UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                    FORM 10-Q

     [X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES

                              EXCHANGE ACT OF 1934

                  FOR THE QUARTERLY PERIOD ENDED APRIL 27, 2002

                                       OR

     [_] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES

                              EXCHANGE ACT OF 1934

                  FOR THE TRANSITION PERIOD FROM _____ TO _____

                        COMMISSION FILE NUMBER 000-27273

                             SYCAMORE NETWORKS, INC.
             (Exact name of registrant as specified in its charter)

                Delaware                                  04-3410558
    (State or other jurisdiction                      (I.R.S. Employer
  of incorporation or organization)                   Identification No.)

                                150 Apollo Drive
                              Chelmsford, MA 01824
                    (Address of principal executive offices)
                                   (Zip code)

                                 (978) 250-2900
              (Registrant's telephone number, including area code)

                                      NONE
              (Former name, former address and former fiscal year,
                          if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports) Yes X No ___, and (2) has been subject to such
filing requirements for the past 90 days. Yes X No___ .

The number of shares outstanding of the Registrant's Common Stock as of May 31,
2002 was 273,680,683.

                                       1



Sycamore Networks, Inc.



Index
- -----
                                                                               
Part I.      Financial Information

Item 1.      Financial Statements

             Consolidated Balance Sheets as of April 27, 2002 and July 31, 2001    3

             Consolidated Statements of Operations for the three and nine months
             ended April 27, 2002 and April 28, 2001                               4

             Consolidated Statements of Cash Flows for the nine months
             ended April 27, 2002 and April 28, 2001                               5

             Notes to Consolidated Financial Statements                            6

Item 2.      Management's Discussion and Analysis of Financial
             Condition and Results of Operations                                  12

Item 3.      Quantitative and Qualitative Disclosure About Market Risk            31

Part II.     Other Information

Item 1.      Legal Proceedings                                                    31

Item 6.      Exhibits and Reports on Form 8-K                                     32

             Signature                                                            33

             Exhibit Index                                                        34


                                       2



Part I. Financial Information
ITEM 1. FINANCIAL STATEMENTS

SYCAMORE NETWORKS, INC.
CONSOLIDATED BALANCE SHEETS
(IN THOUSANDS, EXCEPT PAR VALUE)



                                                                            April 27,      July 31,
                                                                              2002           2001
                                                                              ----           ----
                                                                                   
Assets
Current assets:
     Cash and cash equivalents                                            $   262,318    $   492,500
     Short-term investments                                                   588,755        332,471
     Accounts receivable, net of allowance for doubtful accounts
         of $5,185 and $4,773 at April 27, 2002 and July 31, 2001,
         respectively                                                          24,649         41,477
     Inventories                                                               15,077         66,939
     Prepaids and other current assets                                          8,632         13,739
                                                                          -----------    -----------
Total current assets                                                          899,431        947,126
                                                                          -----------    -----------

Property and equipment, net                                                    59,266        106,625
Long-term investments                                                         206,097        423,578
Other assets                                                                   13,380         73,992
                                                                          -----------    -----------
Total assets                                                              $ 1,178,174    $ 1,551,321
                                                                          ===========    ===========

Liabilities and Stockholders' Equity
Current liabilities:
     Accounts payable                                                     $    12,849    $    62,513
     Accrued expenses                                                          19,779         25,199
     Accrued restructuring costs                                               31,649         61,003
     Deferred revenue                                                           7,041          6,607
     Other current liabilities                                                  5,186          8,139
                                                                          -----------    -----------
Total current liabilities                                                      76,504        163,461
                                                                          -----------    -----------

Stockholders' equity:
    Preferred stock, $.01 par value, 5,000 shares authorized; none
       issued or outstanding                                                       --             --
    Common stock, $.001 par value; 2,500,000 shares authorized;
       273,681 shares issued and outstanding at April 27, 2002
       and July 31, 2001, respectively                                            274            274
     Additional paid-in capital                                             1,736,084      1,738,505
     Accumulated deficit                                                     (607,556)      (301,429)
     Deferred compensation                                                    (29,195)       (54,110)
     Treasury stock, at cost, 2,077 and 680 shares held at
          April 27, 2002 and July 31, 2001, respectively                         (219)          (126)
     Accumulated other comprehensive income                                     2,282          4,746
                                                                          -----------    -----------
Total stockholders' equity                                                  1,101,670      1,387,860
                                                                          -----------    -----------

Total liabilities and stockholders' equity                                $ 1,178,174    $ 1,551,321
                                                                          ===========    ===========


The accompanying notes are an integral part of the consolidated financial
statements.

                                       3



SYCAMORE NETWORKS, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS
(IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)



                                                                            Three Months Ended         Nine Months Ended
                                                                            ------------------         -----------------
                                                                           April 27,    April 28,    April 27,    April 28,
                                                                             2002         2001         2002         2001
                                                                             ----         ----         ----         ----
                                                                                                      
Revenue .................................................................  $  13,582    $  54,203    $  56,625    $ 323,894
Cost of revenue (exclusive of non-cash stock compensation
expense of $440, $480, $1,393 and $2,611) ...............................      3,052      132,254      145,069      275,504
                                                                           ---------    ---------    ---------    ---------
Gross profit (loss) .....................................................     10,530      (78,051)     (88,444)      48,390

Operating expenses:
   Research and development (exclusive of non-cash stock
    compensation expense of $2,395, $2,894, $7,460
      and $31,186) ......................................................     25,541       44,407       88,041      122,400
   Sales and marketing (exclusive of non-cash stock
    compensation expense of $2,205, $2,495, $8,771
      and $19,732) ......................................................      8,870       22,213       33,953       61,483
   General and administrative (exclusive of non-cash stock
    compensation expense of $501, $1,461, $1,778
      and $3,014) .......................................................      2,186        4,419        7,990       13,038
   Amortization of stock compensation ...................................      5,541        7,330       19,402       56,543
   Restructuring charges and related asset impairments ..................         --       81,926       77,306       81,926
   Acquisition costs ....................................................         --           --           --        4,948
                                                                           ---------    ---------    ---------    ---------
        Total operating expenses ........................................     42,138      160,295      226,692      340,338
                                                                           ---------    ---------    ---------    ---------

 Loss from operations ...................................................    (31,608)    (238,346)    (315,136)    (291,948)
 Losses on investments ..................................................         --           --      (22,737)          --
 Interest and other income, net .........................................      8,765       18,940       31,746       67,564
                                                                           ---------    ---------    ---------    ---------
 Loss before income taxes ...............................................    (22,843)    (219,406)    (306,127)    (224,384)
 Provision for income taxes .............................................         --        5,703           --       13,132
                                                                           ---------    ---------    ---------    ---------
 Net loss ...............................................................  $ (22,843)   $(225,109)   $(306,127)   $(237,516)
                                                                           =========    =========    =========    =========

Basic and diluted net loss per share ....................................  $   (0.09)   $   (0.94)   $   (1.21)   $   (1.01)

Shares used in per share calculation - basic and diluted ................    256,468      240,492      252,877      235,483


   The accompanying notes are an integral part of the consolidated financial
                                  statements.

                                       4



SYCAMORE NETWORKS, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
(IN THOUSANDS)



                                                                                   Nine months ended
                                                                                   -----------------
                                                                               April 27,      April 28,
                                                                                 2002          2001
                                                                                 ----          ----
                                                                                      
Cash flows from operating activities:
   Net loss                                                                    $(306,127)   $(237,516)
   Adjustments to reconcile net loss to net
   cash used in operating activities:
     Depreciation and amortization                                                32,440       24,715
     Restructuring charges and related asset impairments                         134,022       52,476
     Amortization of stock compensation                                           19,402       56,543
Changes in operating assets and liabilities:
     Accounts receivable                                                          16,828       (2,732)
     Inventories                                                                   1,344      (40,589)
     Prepaids and other current assets                                             5,107       10,299
     Deferred revenue                                                                434      (13,583)
     Accounts payable                                                            (49,664)      23,603
     Accrued expenses and other liabilities                                       (8,373)      12,682
     Accrued restructuring costs                                                 (29,354)      78,166
                                                                               ---------    ---------
Net cash used in operating activities                                           (183,941)     (35,936)
                                                                               ---------    ---------

Cash flows from investing activities:
     Purchases of property and equipment                                         (13,036)    (101,108)
     Purchases of investments                                                   (781,671)    (472,768)
     Maturities of investments                                                   740,404      517,638
     Decrease (increase) in other assets                                           5,286      (46,798)
                                                                               ---------    ---------
Net cash used in investing activities                                            (49,017)    (103,036)
                                                                               ---------    ---------

Cash flows from financing activities:
     Proceeds from issuance of common stock                                        3,056        5,803
     Purchase of treasury stock                                                     (280)        (279)
     Payments received for notes receivable                                           --          262
     Payments on notes payable                                                        --       (1,780)
                                                                               ---------    ---------
Net cash provided by financing activities                                          2,776        4,006
                                                                               ---------    ---------

Net decrease in cash and cash equivalents                                       (230,182)    (134,966)
Cash and cash equivalents, beginning of period                                   492,500      429,965
                                                                               ---------    ---------
Cash and cash equivalents, end of period                                       $ 262,318    $ 294,999
                                                                               =========    =========


    The accompanying notes are an integral part of the consolidated financial
                                  statements.

                                       5



SYCAMORE NETWORKS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. NATURE OF THE BUSINESS

Sycamore Networks, Inc. (the "Company") was incorporated in Delaware on February
17, 1998. The Company is a leading provider of intelligent optical networking
products that enable telecommunications service providers to quickly and
cost-effectively transform the capacity created by their fiber optic networks
into usable bandwidth for the deployment of new high-speed data services.

The Company is subject to risks common to technology-based companies including,
but not limited to, the development of new technology, development of markets
and distribution channels, dependence on key personnel, and the ability to
obtain additional capital as needed to meet its product plans. The Company's
ultimate success is dependent upon its ability to successfully develop and
market its products.

2. BASIS OF PRESENTATION

The accompanying financial data as of April 27, 2002 and for the three and nine
months ended April 27, 2002 and April 28, 2001 has been prepared by the Company,
without audit, pursuant to the rules and regulations of the Securities and
Exchange Commission ("SEC"). Certain information and footnote disclosures
normally included in financial statements prepared in accordance with generally
accepted accounting principles have been condensed or omitted pursuant to such
rules and regulations. However, the Company believes that the disclosures are
adequate to make the information presented not misleading. These consolidated
financial statements should be read in conjunction with the consolidated
financial statements and the notes thereto included in the Company's Annual
Report on Form 10-K for the fiscal year ended July 31, 2001.

In the opinion of management, all adjustments (which include only normal
recurring adjustments) necessary to present a fair statement of financial
position as of April 27, 2002, and results of operations and cash flows for the
periods ended April 27, 2002 and April 28, 2001 have been made. The results of
operations for the three and nine months ended April 27, 2002 are not
necessarily indicative of the operating results for the full fiscal year or any
future periods.

3. REVENUE DETAIL

Components of revenue and cost of revenue included in the consolidated
statements of operations are as follows (in thousands):



                                 Three Months Ended          Nine Months Ended
                                 ------------------          -----------------
                               April 27,     April 28,     April 27,     April 28,
                                 2002          2001          2002          2001
                                 ----          ----          ----          ----
                                                            
Revenue
  Product                     $     6,929   $    48,195   $    39,826   $   312,436
  Service                           6,653         6,008        16,799        11,458
                              -----------   -----------   -----------   -----------
                              $    13,582   $    54,203   $    56,625   $   323,894
                              -----------   -----------   -----------   -----------

Cost of Revenue
  Product                     $    (2,587)  $   120,379   $   124,221   $   247,811
  Service                           5,639        11,875        20,848        27,693
                              -----------   -----------   -----------   -----------
                              $     3,052   $   132,254   $   145,069   $   275,504
                              -----------   -----------   -----------   -----------


For the nine months ended April 27, 2002, two international customers
represented the majority of the Company's revenue. For the full fiscal year
ending July 31, 2002, the Company anticipates that revenue will continue to be
highly concentrated in a relatively small number of customers, and that
international revenue will represent a relatively high percentage of total
revenue. At April 27, 2002, more than 90% of the Company's accounts receivable
balance was attributable to two international customers.

                                        6



4. NET LOSS PER SHARE

Basic net loss per share is computed by dividing the net loss for the period by
the weighted-average number of common shares outstanding during the period less
unvested restricted stock. Diluted net loss per share is computed by dividing
the net loss for the period by the weighted-average number of common and common
equivalent shares outstanding during the period, if dilutive. Common equivalent
shares are composed of unvested shares of restricted common stock and the
incremental common shares issuable upon the exercise of stock options and
warrants outstanding. The following table sets forth the computation of basic
and diluted net loss per share, (in thousands, except per share data):



                                                                   Three Months Ended        Nine Months Ended
                                                                   ------------------        -----------------
                                                                 April 27,    April 28,    April 27,   April 28,
                                                                   2002         2001         2002        2001
                                                                 ---------    ---------    ---------   ---------
                                                                                           
Numerator
   Net loss                                                      $ (22,843)   $(225,109)   $(306,127)  $(237,516)
                                                                 =========    =========    =========   =========

Denominator
   Weighted-average shares of common stock outstanding             271,657      273,359      272,252     272,894
   Weighted-average shares subject to repurchase                   (15,189)     (32,867)     (19,375)    (37,411)
                                                                 ---------    ---------    ---------   ---------

  Shares used in per-share calculation - basic and diluted         256,468      240,492      252,877     235,483
                                                                 =========    =========    =========   =========

Net loss per share:
   Basic and diluted                                             $   (0.09)   $   (0.94)   $   (1.21)  $   (1.01)
                                                                 =========    =========    =========   =========


Options to purchase 29.7 million and 38.5 million shares of common stock at a
weighted-average exercise price of $10.16 and $44.19 have not been included in
the computation of diluted net loss per share for the three and nine months
ended April 27, 2002 and April 28, 2001, respectively, as their effect would
have been anti-dilutive. Warrants to purchase 150,000 shares of common stock at
an exercise price of $11.69 have not been included in the computation of diluted
net loss per share for each period presented, as their effect would have been
anti-dilutive.

5. STOCK OPTION EXCHANGE OFFER

In May 2001 the Company announced an offer to exchange outstanding employee
stock options having an exercise price of $7.25 or more per share in return for
restricted stock and new stock options to be granted by the Company (the
"Exchange Offer"). Pursuant to the Exchange Offer, in exchange for eligible
options, an option holder generally received a number of shares of restricted
stock equal to one-tenth (1/10) of the total number of shares subject to the
options tendered by the option holder and accepted for exchange, and commitment
for new options to be issued exercisable for a number of shares of common stock
equal to nine-tenths (9/10) of the total number of shares subject to the options
tendered by the option holder and accepted for exchange. In order to address
potential adverse tax consequences for employees of certain international
countries, these employees were allowed to forego the restricted stock grants
and receive all stock options.

A total of 17.6 million options were accepted for exchange under the Exchange
Offer and accordingly, were canceled in June 2001. A total of 1.7 million shares
of restricted stock were issued in June 2001 and the Company recorded deferred
compensation of $12.6 million related to these grants at that time. Due to
cancellations of restricted stock relating to employee terminations, which were
primarily due to the Company's fiscal 2002 restructuring program as described in
Note 8, the number of outstanding shares of restricted stock related to the
Exchange Offer was subsequently reduced to 1.3 million shares and the total
deferred compensation relating to the Exchange Offer was reduced to
approximately $10.1 million. The deferred compensation costs will be amortized
ratably over the vesting periods of the restricted stock, generally over a four
year period, with 25% of the shares vesting one year after the date of grant and
the remaining 75% vesting quarterly thereafter. Until the restricted stock
vests, such shares are subject to forfeiture in the event the employee leaves
the Company.

Upon the completion of the Exchange Offer, options to purchase approximately
15.9 million shares were expected to be granted in the second quarter of fiscal
2002, no sooner than six months and one day from June 20, 2001. However, due to
the effect of employee terminations, which were primarily due to the Company's
fiscal 2002 restructuring program as described in Note 8, the number of options
which were granted in the second quarter of fiscal 2002 related to the Exchange
Offer was approximately 12.6 million shares. The new options will generally vest
over three years, with 8.34% of the options vesting on the date of grant and the
remaining 91.66% vesting quarterly thereafter subject to forfeiture in the event
the employee leaves the Company. The new options were granted with an exercise
price of $4.89 per share, equal to the fair market value of the Company's common
stock on the date of the grant.

                                        7



6. INVENTORIES

Inventories consisted of the following (in thousands):

                                             April 27,     July 31,
                                               2002          2001
                                             --------      --------

Raw materials                                $  3,449      $ 25,299
Work in process                                   754        18,849
Finished goods                                 10,874        22,791
                                             --------      --------
                                             $ 15,077      $ 66,939
                                             ========      ========

7. COMPREHENSIVE LOSS

The Company reports comprehensive loss in accordance with Statement of Financial
Accounting Standards No. 130, "Reporting Comprehensive Income" (SFAS No. 130).
The components of comprehensive loss are as follows (in thousands):



                                               Three Months Ended       Nine Months Ended
                                               ------------------       -----------------
                                             April 27,    April 28,   April 27,    April 28,
                                                2002         2001        2002         2001
                                             ---------    ---------   ---------    ---------
                                                                       
Net loss                                     $ (22,843)   $(225,109)  $(306,127)   $(237,516)
Other comprehensive income:
  Unrealized gain (loss) on investments         (2,428)         433      (2,464)         936
                                             ---------    ---------   ---------    ---------
Comprehensive loss                           $ (25,271)   $(224,676)  $(308,591)   $(236,580)
                                             =========    =========   =========    =========


8. RESTRUCTURING AND RELATED ASSET IMPAIRMENTS

Beginning in the third quarter of fiscal 2001, unfavorable economic conditions
and reduced capital spending by telecommunications service providers negatively
impacted the Company's operating results in a progressive and increasing manner.
As a result, the Company has enacted two separate business restructuring
programs, the first in the third quarter of fiscal 2001 (the "fiscal 2001
restructuring"), and the second in the first quarter of fiscal 2002 (the "fiscal
2002 restructuring"). Details regarding each of these restructuring actions are
as follows:

Fiscal 2001 Restructuring:
- --------------------------

As a result of the unfavorable conditions referred to above, the Company
implemented a restructuring program in the third quarter of fiscal 2001,
designed to reduce expenses in order to align resources with long-term growth
opportunities. The restructuring program included a workforce reduction,
consolidation of excess facilities, and the restructuring of certain business
functions to eliminate non-strategic products and overlapping feature sets. This
included the discontinuance of the SN 6000 Intelligent Optical Transport product
and the bi-directional capabilities of the SN 8000 Intelligent Optical Network
Node. As a result of the restructuring program, the Company recorded
restructuring charges and related asset impairments of $81.9 million classified
as operating expenses and an excess inventory charge of $84.0 million relating
to the discontinued product lines, which was classified as cost of revenue.

The restructuring charges and related asset impairments recorded in the third
quarter of fiscal 2001, and the reserve activity since that time, are summarized
as follows (in thousands):



                                                                               Accrual                    Accrual
                                        Total                   Fiscal 2001   Balance at   Fiscal 2002   Balance at
                                     Restructuring   Non-cash      Cash        July 31,       Cash       April 27,
                                        Charge       Charges     Payments        2001       Payments        2002
                                        ------       -------     --------        ----       --------        ----
                                                                                       
Workforce reductions                   $  4,174      $    829    $   2,823    $     522     $     380    $     142
Facility consolidations and
certain other costs                      24,437         1,214        1,132       22,091         3,409       18,682
Inventory and asset write-downs         137,285        84,972       13,923       38,390        38,390           --
                                       --------      --------    ---------    ---------     ---------    ---------
Total                                  $165,896      $ 87,015    $  17,878    $  61,003     $  42,179    $  18,824
                                       ========      ========    =========    =========     =========    =========


                                        8



The fiscal 2001 restructuring program was substantially completed during the
first half of fiscal 2002. The remaining cash payments consist primarily of
facility consolidation charges that will be paid over the respective lease terms
through fiscal 2007 and administrative expenses associated with the
restructuring activities.

Fiscal 2002 Restructuring:
- -------------------------

As a result of a continued decline in overall economic conditions and further
reductions in capital spending by telecommunications service providers, the
Company implemented a second restructuring program in the first quarter of
fiscal 2002, designed to further reduce expenses to align resources with
long-term growth opportunities. The restructuring program included a workforce
reduction, consolidation of excess facilities, and charges related to excess
inventory and other asset impairments.

As a result of the restructuring program, the Company recorded restructuring
charges and related asset impairments of $77.3 million classified as operating
expenses and an excess inventory charge of $102.4 million classified as cost of
revenue. In addition, the Company recorded charges totaling $22.7 million
classified as a non-operating expense, relating to impairments of investments in
non-publicly traded companies that were determined to be other than temporary.
The following paragraphs provide detailed information relating to the
restructuring charges and related asset impairments which were recorded during
the first quarter of fiscal 2002.

      Workforce reduction

The restructuring program resulted in the reduction of 239 regular employees
across all business functions and geographic regions. The workforce reductions
were substantially completed in the first quarter of fiscal 2002. The Company
recorded a workforce reduction charge of approximately $7.1 million relating
primarily to severance and fringe benefits. In addition the number of temporary
and contract workers employed by the Company was also reduced.

      Consolidation of facilities and certain other costs

The Company recorded a charge of $17.2 million relating to the consolidation of
excess facilities and certain other costs. The total charge includes $11.2
million related to the write-down of certain land, as well as lease terminations
and non-cancelable lease costs. The Company also recorded other restructuring
costs of $6.0 million relating primarily to administrative expenses and
professional fees in connection with the restructuring activities.

      Inventory and asset write-downs

The Company recorded a charge of $155.5 million relating to the write-down of
inventory to its net realizable value and the impairment of certain other
assets. The total charge includes $102.4 million of inventory write-downs and
purchase commitments for inventory which was recorded as part of cost of
revenue. This excess inventory charge was due to a severe decline in the demand
for the Company's products. The Company also recorded charges totaling $53.1
million for asset impairments, including the assets related to the Company's
vendor financing agreements and fixed assets that were abandoned by the Company.
Since revenue had been recognized under the vendor financing agreements on a
cash basis, the amount of the impairment loss was limited to the cost of the
systems shipped to the vendor financing customers, which had been recorded in
other long-term assets.

      Losses on investments

The Company recorded charges totaling $22.7 million for impairments of
investments in non-publicly traded companies that were determined to be other
than temporary. The impairment charges were classified as a non-operating
expense.

                                        9



The restructuring charges and related asset impairments recorded in the first
quarter of fiscal 2002, and the reserve activity since that time, are summarized
as follows (in thousands):




                                                                                                      Accrual
                                                Original                                             Balance at
                                              Restructuring    Non-cash       Cash                   April 27,
                                                 Charge        Charges      Payments   Adjustments      2002
                                                 ------        -------      --------   -----------      ----
                                                                                       
Workforce reduction                           $  7,106      $      173      $   6,088  $        --    $     845
Facility consolidations and certain other
costs                                           17,181           8,572          1,195           --        7,414
Inventory and asset write-downs                155,451         102,540         39,306        9,039        4,566
Losses on investments                           22,737          22,737             --           --           --
                                              --------      ----------      ---------  -----------    ---------
Total                                         $202,475      $  134,022      $  46,589  $     9,039    $  12,825
                                              ========      ==========      =========  ===========    =========


During the third quarter of fiscal 2002, the Company recorded a $9.0 million
credit to cost of revenue due to changes in estimates, the majority of which
related to favorable settlements with contract manufacturers. The remaining cash
expenditures relating to workforce reductions will be substantially paid by the
fourth quarter of fiscal 2002. Facility consolidation charges will be paid over
the respective lease terms through fiscal 2005. The Company expects to
substantially complete the fiscal 2002 restructuring program by the first
quarter of fiscal 2003.

9. RECENT ACCOUNTING PRONOUNCEMENTS

In June 2001, the FASB issued SFAS No. 142, Goodwill and Other Intangible
Assets, which addresses the recognition and measurement of goodwill and other
intangible assets subsequent to their acquisition. SFAS No. 142 also addresses
the initial recognition and measurement of intangible assets acquired outside of
a business combination whether acquired individually or with a group of other
assets. SFAS No. 142 provides that intangible assets with finite useful lives be
amortized and that intangible assets with indefinite lives and goodwill will not
be amortized, but will rather be tested at least annually for impairment.
Although SFAS No. 142 is not required to be adopted by the Company until fiscal
2003, its provisions must be applied to goodwill and other intangible assets
acquired after June 30, 2001. As of April 27, 2002, the Company does not have
any goodwill or other intangible assets relating to business combinations that
were accounted for under APB Opinion No. 16. Accordingly, the adoption of SFAS
No. 142 will not have a material impact on the Company's financial position or
results of operations.

In October 2001, the FASB issued SFAS No. 144, Accounting for the Impairment or
Disposal of Long-Lived Assets, which addresses the financial accounting and
reporting for the disposal of long-lived assets. SFAS No. 144 is effective for
financial statements issued for fiscal years beginning after December 15, 2001
and interim periods within those fiscal years. Accordingly, the Company will be
required to adopt SFAS No. 144 in the first quarter of fiscal 2003. The adoption
of SFAS No. 144 is not expected to have a material impact on the Company's
financial position or results of operations.

10. LITIGATION

Beginning on July 2, 2001, several purported class action complaints were filed
in the United States District Court for the Southern District of New York
against the Company and several of its officers and directors and the
underwriters for the Company's initial public offering on October 21, 1999. Some
of the complaints also include the underwriters for the Company's follow-on
offering on March 14, 2000. The complaints were consolidated into a single
action and an amended complaint was filed on April 19, 2002. The amended
complaint was filed on behalf of persons who purchased the Company's common
stock between October 21, 1999 and December 6, 2000. The amended complaint
alleges violations of the Securities Act of 1933, as amended, and the Securities
Exchange Act of 1934, as amended, primarily based on the assertion that the
Company's lead underwriters, the Company and the other named defendants made
material false and misleading statements in the Company's Registration
Statements and Prospectuses filed with the SEC in October 1999 and March 2000
because of the failure to disclose (a) the alleged solicitation and receipt of
excessive and undisclosed commissions by the underwriters in connection with the
allocation of shares of common stock to certain investors in the Company's
public offerings and (b) that certain of the underwriters allegedly had entered
into agreements with investors whereby underwriters agreed to allocate the
public offering shares in exchange for which the investors agreed to make
additional purchases of stock in the aftermarket at pre-determined prices. The
amended complaint alleges claims against the Company, several of the Company's
officers and directors and the underwriters under Sections 11 and 15 of the
Securities Act. It also alleges claims against the Company, the individual
defendants and the underwriters under Sections 10(b) and 20(a) of the Securities
Exchange Act. The action against the Company is being coordinated with over
three hundred other nearly identical actions filed against other companies. No
date has been set for a response to the amended complaint. The actions seek
damages in an unspecified amount. The Company believes that the claims against
it are

                                       10



without merit and intends to defend against the complaints vigorously. The
Company is not currently able to estimate the possibility of loss or range of
loss, if any, relating to these claims.

The Company is subject to legal proceedings, claims, and litigation arising in
the ordinary course of business. While the outcome of these matters is currently
not determinable, management does not expect that the ultimate costs to resolve
these matters will have a material adverse effect on the Company's results of
operations or financial position.

                                       11



ITEM 2.

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
OPERATIONS

Except for the historical information contained herein, we wish to caution you
that certain matters discussed in this report constitute forward-looking
statements that involve risks and uncertainties. Our actual results could differ
materially from those stated or implied in forward-looking statements due to a
number of factors, including, without limitation, those risks and uncertainties
discussed under the heading "Factors That May Affect Future Operating Results"
contained in our Annual Report on Form 10-K and other reports we file from time
to time with the SEC and the risks and uncertainties discussed under the
captions "Risks Related To Our Business" and "Risks Related to the Securities
Market." Forward-looking statements include statements regarding our
expectations, beliefs, intentions or strategies regarding the future and can be
identified by forward-looking words such as "anticipate," "believe," "could,"
"estimate," "expect," "intend," "may, " "should," "will," and "would" or similar
words.

OVERVIEW

We are a leading provider of intelligent optical networking products that enable
telecommunications service providers to quickly and cost-effectively transform
the capacity created by their fiber optic networks into usable bandwidth for the
deployment of new high-speed data services. Since our inception in February
1998, our revenue has increased from $11.3 million for the fiscal year ended
July 31, 1999 to $374.7 million for the fiscal year ended July 31, 2001. Our
rapid growth in revenue during the majority of this period reflected a strong
economic environment for telecommunications service providers, driven by strong
capital markets and by changes in the regulatory environment, in particular
those brought about by the Telecommunications Act of 1996. These factors enabled
the entry of a significant number of new companies, typically referred to as
emerging service providers or emerging carriers, into the telecommunications
services industry.

Beginning in the third quarter of fiscal 2001, our revenue declined
significantly due to unfavorable economic conditions caused by a rapid and
significant decrease in capital spending by telecommunications service
providers. Emerging service providers, which had been the early adopters of our
technology, were no longer able to continue to fund aggressive deployments of
equipment within their networks due to their inability to access the capital
markets. Since then, many emerging service providers have experienced severe
financial difficulties, and in many cases, have filed for bankruptcy protection,
or have liquidated their assets and are no longer in business. This trend was
compounded by decisions by incumbent service providers to slow their capital
expenditures significantly, in part due to reduced competitive pressure from
emerging carriers. In addition, many incumbent service providers have found
their prospects for raising additional capital through the issuance of debt or
equity securities to be greatly reduced, causing them to decrease capital
expenditures to the minimum amount required to support their existing customer
commitments. These conditions are currently impacting many of our current and
prospective customers, and make any recovery in capital spending extremely
difficult to forecast. Our revenue has been, and continues to be, negatively
impacted by these unfavorable economic conditions.

We currently anticipate that the cost of revenue and the resulting gross margin
will continue to be adversely affected by several factors, including reduced
demand for our products, the effects of new product introductions including
volumes and manufacturing efficiencies, component limitations, the mix of
products and services sold, competitive pricing, and possible increases in
inventory levels which could increase our exposure to excess and obsolete
inventory charges. While we have taken actions to reduce our cost structure, we
anticipate that we will continue to incur operating losses unless our revenue
increases significantly compared to current levels. During the last half of
fiscal 2001 and the first three quarters of fiscal 2002, we incurred substantial
operating losses totaling $613.5 million, which includes net restructuring and
asset impairment charges totaling $336.6 million. We expect to incur operating
losses until the overall economic environment and the demand for our products
improve. At this time, we have limited visibility into future revenue and cannot
predict when, or if, the economic environment and the demand for our products
will improve.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

Management's discussion and analysis of its financial condition and results of
operations are based upon our interim consolidated financial statements. The
preparation of these financial statements requires us to make estimates and
judgments that affect the reported amounts of assets, liabilities, revenue and
expenses and related disclosure of contingent liabilities. We evaluate these
estimates on an ongoing basis, including those relating to bad debts,
inventories, valuation of investments, warranty obligations, restructuring
reserves, litigation and other contingencies. Estimates are based on our
historical experience and other assumptions that are considered reasonable under
the circumstances, the results of which form the basis for making judgments
about the carrying values of assets and liabilities that are not readily
apparent from other sources. Actual results may differ from these

                                       12



estimates. To the extent there are material differences between our estimates
and the actual results, our future results of operations will be affected.

We believe that the following critical accounting policies affect the most
significant judgments and estimates used in the preparation of our consolidated
financial statements. When products are shipped to customers, we evaluate
whether all of the fundamental criteria for revenue recognition have been met.
The most significant judgments for revenue recognition typically involve whether
there are any significant uncertainties regarding customer acceptance and
whether collectibility can be considered reasonably assured. In addition, the
Company's transactions often consist of multiple element arrangements which must
be analyzed to determine the relative fair value of each element, the amount of
revenue to be recognized upon shipment, if any, and the period and conditions
under which deferred revenue should be recognized. After customers have been
invoiced, management evaluates the outstanding accounts receivable balances
until they are collected, to determine whether an allowance for doubtful
accounts should be recorded. In the event of a sudden deterioration in a
particular customer's financial condition, additional provisions for doubtful
accounts may be required, such as the specific provision that we recorded in the
fourth quarter of fiscal 2001. We accrue for the estimated cost of product
warranties at the time revenue is recognized, based primarily on our historical
experience. If actual warranty claims exceed the amounts accrued, additional
warranty charges would be required which would reduce gross margins in future
periods.

We continuously monitor our inventory balances and provisions are recorded for
any differences between the cost of the inventory and its estimated market
value, based on assumptions about future demand and market conditions. To the
extent that a severe decline in forecasted demand occurs, significant charges
for excess inventory are likely to occur, such as the $102.4 million charge we
recorded in the first quarter of fiscal 2002. During the third quarter of fiscal
2001 and the first quarter of fiscal 2002, we recorded charges for restructuring
and related asset impairments totaling $368.4 million, including inventory
related charges of $186.4 million. These restructuring activities required us to
make numerous assumptions and estimates, including future revenue levels and
product mix, the timing of and the amounts received for subleases of excess
facilities, the fair values of impaired assets, the amounts of other than
temporary impairments of strategic investments, and the projected administrative
expenses and professional fees associated with the restructuring activities. The
estimates and assumptions relating to the restructuring activities must be
continually monitored and evaluated, and if these estimates and assumptions
change, we may be required to record additional charges or credits against the
reserves previously recorded for these restructuring activities. For example,
during the third quarter of fiscal 2002, we recorded a $9.0 million credit to
cost of revenue, due to changes in estimates relating to the restructuring
charge that had been recorded in the first quarter of fiscal 2002.

RESULTS OF OPERATIONS

REVENUE

Revenue decreased 75% or $40.6 million to $13.6 million for the three months
ended April 27, 2002 compared to $54.2 million for the same period in fiscal
2001. Revenue decreased 83% or $267.3 million to $56.6 million for the nine
months ended April 27, 2002 compared to $323.9 million for the same period in
fiscal 2001. The decrease in revenue was due to the decline in the overall
economic environment, in particular the reductions in capital spending by our
target customers. For the three and nine months ended April 27, 2002, product
revenue declined significantly while service revenue increased compared to the
same periods in fiscal 2001. The increase in service revenue was due to revenue
from maintenance and other services associated with product shipments that
occurred in previous periods. For the nine months ended April 27, 2002, two
international customers represented the majority of the Company's revenue. For
the full fiscal year ending July 31, 2002, the Company anticipates that revenue
will continue to be highly concentrated in a relatively small number of
customers, and that international revenue will represent a relatively high
percentage of total revenue.

Sales to emerging carriers, which had represented a large percentage of our
revenue in the first half of fiscal 2001, were insignificant in the first three
quarters of fiscal 2002, and we expect this trend to continue for the
foreseeable future. While we have redirected our marketing efforts towards
incumbent carriers, these customers typically have longer sales evaluation
cycles than emerging carriers, and many incumbent carriers have also announced
significant reductions in their capital expenditure budgets. Accordingly, there
can be no certainty as to the severity or duration of the current economic
downturn and its impact on our future revenue.

                                       13



COST OF REVENUE

Cost of revenue decreased $129.1 million to $3.1 million for the three months
ended April 27, 2002 compared to $132.2 million for the same period in fiscal
2001. Cost of revenue for the three months ended April 27, 2002 included a
credit of $9.0 million, due to changes in estimates relating to the excess
inventory charge recorded in the first quarter of fiscal 2002. Cost of revenue
for the three months ended April 28, 2001 included an inventory write-down of
$84.0 million associated with the consolidation and elimination of certain
product lines. Excluding the impact of these charges, cost of revenue as a
percentage of revenue was 89% for the three months ended April 27, 2002,
compared to 89% for the same period in fiscal 2001. Cost of revenue as a
percentage of revenue for each period reflects the lower utilization of certain
fixed manufacturing and customer support costs at reduced revenue levels. Cost
of revenue for services decreased $6.3 million to $5.6 million for the three
months ended April 27, 2002 compared to $11.9 million for the same period in
fiscal 2001, due primarily to the overall decrease in revenue and the
corresponding decrease in customer support costs due to the Company's
restructuring activities. In addition to the costs associated with supporting
existing customers, cost of revenue for services includes costs to support
evaluations and trials for potential customers, such as incumbent carriers which
typically have relatively long sales evaluation cycles.

Cost of revenue decreased $130.4 million to $145.1 million for the nine months
ended April 27, 2002 compared to $275.5 million for the same period in fiscal
2001. Cost of revenue for the nine months ended April 27, 2002 included a net
charge of $93.4 million relating to excess inventory due to a significant
reduction in the Company's demand forecasts in the first quarter of fiscal 2002.
The original charge of $102.4 million, recorded in the first quarter of fiscal
2002, was reduced by a $9.0 million credit in the third quarter of fiscal 2002
due to changes in estimates. Cost of revenue for the nine months ended April 28,
2001 included an inventory write-down of $84.0 million associated with the
consolidation and elimination of certain product lines. Excluding the effect of
these charges, cost of revenue as a percentage of revenue was 91% for the nine
months ended April 27, 2002, compared to 59% for the same period in fiscal 2001.
Excluding the impact of the excess inventory charges, the increase in cost of
revenue as a percentage of revenue reflects the overall decrease in revenue and
lower utilization of certain fixed manufacturing and customer support costs.
Cost of revenue for services decreased $6.9 million to $20.8 million for the
nine months ended April 27, 2002 compared to $27.7 million for the same period
in fiscal 2001, due primarily to the overall decrease in revenue and
corresponding decrease in customer support costs.

RESEARCH AND DEVELOPMENT EXPENSES

Research and development expenses decreased $18.9 million to $25.5 million for
the three months ended April 27, 2002 compared to $44.4 million for the same
period in fiscal 2001. Research and development expenses decreased $34.4 million
to $88.0 million for the nine months ended April 27, 2002 compared to $122.4
million for the same period in fiscal 2001. The decreases in expenses were
primarily due to reduced costs for project related materials and a decrease in
personnel related expenses due to the Company's restructuring activities, which
resulted in a consolidation of product offerings and more focused development
efforts.

SALES AND MARKETING EXPENSES

Sales and marketing expenses decreased $13.3 million to $8.9 million for the
three months ended April 27, 2002 compared to $22.2 million for the same period
in fiscal 2001. Sales and marketing expenses decreased $27.5 million to $34.0
million for the nine months ended April 27, 2002 compared to $61.5 million for
the same period in fiscal 2001. The decrease in expenses for each period was
primarily due to reduced costs for personnel and related expenses due to the
Company's restructuring activities as well as decreased program marketing costs.

GENERAL AND ADMINISTRATIVE EXPENSES

General and administrative expenses decreased $2.2 million to $2.2 million for
the three months ended April 27, 2002 compared to $4.4 million for the same
period in fiscal 2001. General and administrative expenses decreased $5.0
million to $8.0 million for the nine months ended April 27, 2002 compared to
$13.0 million for the same period in fiscal 2001. The decrease in expenses for
each period was primarily due to reduced costs for personnel and related
expenses due to the Company's restructuring activities.

AMORTIZATION OF STOCK COMPENSATION

Amortization of stock compensation expense decreased $1.8 million to $5.5
million for the three months ended April 27, 2002 compared to $7.3 million for
the same period in fiscal 2001. Amortization of stock compensation expense
decreased $37.1 million to $19.4 million for the nine months ended April 27,
2002 compared to $56.5 million for the same period in fiscal 2001. Amortization
of stock compensation expense primarily resulted from the granting of stock
options and restricted shares with exercise or sale prices which were deemed to
be below fair market value. The decrease in amortization expense for the three

                                       14



months ended April 27, 2002 was primarily due to headcount reductions due to the
Company's restructuring activities. The significant decrease in amortization
expense for the nine months ended April 27, 2002 was primarily due to $36.3
million of amortization expense recorded during the first quarter of fiscal
2001, due to the accelerated vesting of certain restricted stock and stock
options in connection with the acquisition of Sirocco Systems, Inc. ("Sirocco").
Amortization of stock compensation is expected to impact our reported results of
operations through the fourth quarter of fiscal 2005.

RESTRUCTURING CHARGES AND RELATED ASSET IMPAIRMENTS

As a result of a continued decline in overall economic conditions and further
reductions in capital spending by telecommunications service providers, we
implemented a second restructuring program in the first quarter of fiscal 2002,
designed to further reduce expenses to align resources with long-term growth
opportunities. The restructuring program included a workforce reduction,
consolidation of excess facilities, and charges related to excess inventory and
other asset impairments.

As a result of the restructuring program, we recorded restructuring charges and
related asset impairments of $77.3 million classified as operating expenses and
an excess inventory charge of $102.4 million classified as cost of revenue. In
addition, we recorded charges totaling $22.7 million classified as a
non-operating expense, relating to impairments of investments in non-publicly
traded companies that were determined to be other than temporary. We expect
pretax savings of approximately $45 million in annual operating expenses in
connection with the restructuring program and certain cost reduction
initiatives, as compared to the levels immediately preceding the restructuring
program.

The following paragraphs provide detailed information relating to the
restructuring charges and related asset impairments which were recorded during
the first quarter of fiscal 2002.

      Workforce reduction

The restructuring program resulted in the reduction of 239 regular employees
across all business functions and geographic regions. The workforce reductions
were substantially completed in the first quarter of fiscal 2002. We recorded a
workforce reduction charge of approximately $7.1 million relating primarily to
severance and fringe benefits. In addition the number of temporary and contract
workers employed by us was also reduced.

      Consolidation of facilities and certain other costs

We recorded a charge of $17.2 million relating to the consolidation of excess
facilities and certain other costs. The total charge includes $11.2 million
related to the write-down of certain land, as well as lease terminations and
non-cancelable lease costs. We also recorded other restructuring costs of $6.0
million relating primarily to administrative expenses and professional fees in
connection with the restructuring activities.

      Inventory and asset write-downs

We recorded a charge of $155.5 million relating to the write-down of inventory
to its net realizable value and the impairment of certain other assets. The
total charge includes $102.4 million of inventory write-downs and purchase
commitments for inventory which was recorded as part of cost of revenue. This
excess inventory charge was due to a severe decline in the demand for our
products. We also recorded charges totaling $53.1 million for asset impairments,
including the assets related to our vendor financing agreements and fixed assets
that were abandoned by us. Since revenue had been recognized under the vendor
financing agreements on a cash basis, the amount of the impairment loss was
limited to the cost of the systems shipped to the vendor financing customers,
which had been recorded in other long-term assets.

      Losses on investments

We recorded charges totaling $22.7 million for impairments of investments in
non-publicly traded companies that were determined to be other than temporary.
The impairment charges were classified as a non-operating expense.

                                       15



The restructuring charges and related asset impairments recorded in the first
quarter of fiscal 2002, and the reserve activity since that time, are summarized
as follows (in thousands):



                                                                                                      Accrual
                                                Original                                             Balance at
                                              Restructuring    Non-cash       Cash                   April 27,
                                                 Charge        Charges      Payments   Adjustments      2002
                                                 ------        -------      --------   -----------      ----
                                                                                     
Workforce reduction                            $   7,106       $    173     $  6,088   $        --   $     845
Facility consolidations and certain other
costs                                             17,181          8,572        1,195            --       7,414
Inventory and asset write-downs                  155,451        102,540       39,306         9,039       4,566
Losses on investments                             22,737         22,737           --            --          --
                                               ---------       --------     --------   -----------   ---------
Total                                          $ 202,475       $134,022     $ 46,589   $     9,039   $  12,825
                                               =========       ========     ========   ===========   =========


During the third quarter of fiscal 2002, we recorded a $9.0 million credit to
cost of revenue due to changes in estimates, the majority of which related to
favorable settlements with contract manufacturers. The remaining cash
expenditures relating to workforce reductions will be substantially paid by the
fourth quarter of fiscal 2002. Facility consolidation charges will be paid over
the respective lease terms through fiscal 2005. We expect to substantially
complete the fiscal 2002 restructuring program by the first quarter of fiscal
2003.

      Fiscal 2001 Restructuring

In the third quarter of fiscal 2001, we implemented our first restructuring
program, designed to reduce expenses in order to align resources with long-term
growth opportunities. The restructuring program included a workforce reduction,
consolidation of excess facilities, and the restructuring of certain business
functions to eliminate non-strategic products and overlapping feature sets. As a
result of the restructuring program, we recorded restructuring charges and
related asset impairments of $81.9 million classified as operating expenses and
an excess inventory charge of $84.0 million relating to the discontinued product
lines, which was classified as cost of revenue. The fiscal 2001 restructuring
program was substantially completed during the first half of fiscal 2002. The
remaining cash payments consist primarily of facility consolidation charges that
will be paid over the respective lease terms through fiscal 2007 and
administrative expenses associated with the restructuring activities.

ACQUISITION COSTS

Acquisition costs for the first quarter of fiscal 2001 were $4.9 million related
to the acquisition of Sirocco. These costs included legal and accounting
services and other professional fees associated with the transaction.

INTEREST AND OTHER INCOME, NET

Interest and other income, net decreased $10.1 million to $8.8 million for the
three months ended April 27, 2002 compared to $18.9 million for the same period
in fiscal 2001. Interest and other income decreased $35.9 million to $31.7
million for the nine months ended April 27, 2002 compared to $67.6 million for
the same period in fiscal 2001. The decreases in interest and other income were
primarily attributable to lower interest rates and a lower average cash balance
during each period in fiscal 2002.

PROVISION FOR INCOME TAXES

We did not provide for income taxes for the three and nine months ended April
27, 2002 due to the net losses sustained in each period. During the three and
nine months ended April 28, 2001, we recorded provisions for income taxes of
$5.7 million and $13.1 million, respectively. During the second quarter of
fiscal 2001, we recorded a tax provision of $7.4 million because our expectation
at that time was that we would generate taxable income for the full fiscal year.
During the third quarter of fiscal 2001, we began to incur net losses and
accordingly, the provision for taxes currently payable that was recorded in the
second quarter of fiscal 2001 was subsequently reversed. However, due to the
cumulative net losses, we determined that it was more likely than not that the
net deferred tax assets would not be realized, and accordingly, we recorded a
provision of $13.1 million to establish a full valuation allowance against the
net deferred tax assets.

                                       16



LIQUIDITY AND CAPITAL RESOURCES

Total cash, cash equivalents and investments were $1.06 billion at April 27,
2002. Included in this amount were cash and cash equivalents of $262.3 million,
compared to $492.5 million at July 31, 2001. The decrease in cash and cash
equivalents of $230.2 million was attributable to cash used in operating
activities of $183.9 million and cash used in investing activities of $49.0
million, offset by cash provided by financing activities of $2.7 million.

Cash used in operating activities of $183.9 million consisted of the net loss
for the period of $306.1 million, adjusted for non-cash charges totaling $185.9
million and changes in working capital totaling $63.7 million, the most
significant components of which were decreases in accounts payable of $49.7
million and accrued restructuring costs of $29.4 million. Non-cash charges
included depreciation and amortization, restructuring charges and related asset
impairments, and amortization of stock compensation. Cash used in investing
activities of $49.0 million consisted primarily of net purchases of investments
of $41.3 million and purchases of property and equipment of $13.0 million. Cash
provided by financing activities of $2.7 million consisted primarily of the
proceeds received from employee stock plan activity.

During the first quarter of fiscal 2002, each of our two major vendor financing
customers experienced a significant deterioration in their financial condition.
As a result, we determined that we were unlikely to realize any significant
proceeds from these vendor financing agreements. Accordingly, we recorded an
impairment charge for the assets related to these financing agreements, which
consisted of the cost of the systems shipped to the vendor financing customers,
and had been recorded in other long-term assets.

As a result of the financial demands of major network deployments, service
providers are continuing to request financing assistance from their suppliers.
From time to time we have provided extended payment terms on trade receivables
to certain key customers to assist them with their network deployment plans. In
addition, we may provide or commit to extend additional credit or credit
support, such as vendor financing, to our customers, as we consider appropriate
in the course of our business. Our ability to provide customer financing is
limited and depends on a number of factors, including our capital structure, the
level of our available credit and our ability to factor commitments. The
extension of financing to our customers will limit the capital that we have
available for other uses.

Currently, our primary source of liquidity comes from our cash and cash
equivalents and investments, which total $1.06 billion at April 27, 2002. Our
investments are classified as available-for-sale and consist of securities that
are readily convertible to cash, including certificates of deposits, commercial
paper and government securities, with original maturities ranging from 90 days
to three years. At April 27, 2002, $588.8 million of investments with maturities
of less than one year were classified as short-term investments, and $206.1
million of investments with maturities of greater than one year were classified
as long-term investments. At current revenue levels, we anticipate that some
portion of our existing cash and cash equivalents and investments will continue
to be consumed by operations. Our accounts receivable, while not considered a
primary source of liquidity, represents a concentration of credit risk because
the accounts receivable balance at any point in time typically consists of a
relatively small number of customer account balances. At April 27, 2002, more
than 90% of our accounts receivable balance was attributable to two
international customers. As of April 27, 2002, we do not have any outstanding
debt or credit facilities, and do not anticipate entering into any debt or
credit agreements in the foreseeable future. Our fixed commitments for cash
expenditures consist primarily of payments under operating leases, and are
substantially unchanged from those which were disclosed in Note 5 to the
consolidated financial statements included in the Company's Form 10-K for the
year ended July 31, 2001.

Based on our current plans and business conditions, we believe that our existing
cash, cash equivalents and investments will be sufficient to satisfy our
anticipated cash requirements for at least the next twelve months.

                                       17



FACTORS THAT MAY AFFECT FUTURE OPERATING RESULTS

RISKS RELATED TO OUR BUSINESS

WE ARE EXPOSED TO GENERAL ECONOMIC CONDITIONS AND CONDITIONS SPECIFIC TO THE
TELECOMMUNICATIONS INDUSTRY

         As a result of unfavorable economic conditions and a sudden and severe
decline in the purchasing patterns of our customers, our revenue began to
decline in the third quarter of fiscal 2001, and we have incurred significant
operating losses since that time. The economic downturn and reduced capital
spending by telecommunications service providers has also resulted in longer
selling cycles with extended trial periods for new equipment purchases. While we
have implemented restructuring and cost control programs to reduce our business
expenses, our costs are largely based on the requirements that we believe are
necessary to support sales to incumbent carriers, and a high percentage of our
expenses are, and will continue to be, fixed. As a result, we currently expect
to continue to incur operating losses unless revenue increases significantly
above the current levels.

         In addition to the economic downturn and the decline in capital
spending by telecommunications service providers, recent terrorist acts and
related military actions appear to have added additional uncertainty to an
already weak overall economic environment. Further acts of war or terrorism, or
related effects such as disruptions in air transportation, enhanced security
measures and political instability in certain foreign countries, may adversely
affect our business, operating results and financial condition. Although the
overall economy in the United States has shown some preliminary signs of
recovery in recent months, the telecommunications equipment industry has
remained severely depressed. Our business and results of operations have been
and will continue to be seriously harmed if current economic conditions do not
improve.

WE ARE ENTIRELY DEPENDENT ON OUR LINE OF INTELLIGENT OPTICAL NETWORKING PRODUCTS
AND OUR FUTURE REVENUE DEPENDS ON THEIR COMMERCIAL SUCCESS

         Our future revenue depends on the commercial success of our line of
intelligent optical networking products. As of April 27, 2002, our SN 3000
Optical Access Switch, SN 8000 Intelligent Optical Transport Node, SN 10000
Intelligent Optical Transport System, SN 16000 Intelligent Optical Switch and
Silvx Manager Network Management System are the only products that are currently
available for sale to customers. To be successful, we believe that we must
continually enhance the capabilities of our existing products, and successfully
develop and introduce new products. We cannot assure you that we will be
successful in completing the development, introduction or production
manufacturing of new products or enhancing our existing products. Failure of our
current or planned products to operate as expected could delay or prevent their
adoption. If our target customers do not adopt, purchase and successfully deploy
our current and planned products, our results of operations could be adversely
affected.

         Our line of intelligent optical networking products enables the
creation of a fundamentally different, more flexible and data-centric network
architecture than those created by traditional SONET/SDH-based network equipment
that has historically been used by incumbent carriers for optical networking.
While we believe that our mesh-based architecture offers significant competitive
advantages over traditional SONET/SDH-based equipment, we are directing our
sales efforts towards incumbent carriers, many of which have made significant
investments in SONET/SDH-based equipment. If we are unable to convince incumbent
carriers to deploy our intelligent optical networking solutions and transition
their networks toward more flexible, data-centric mesh architectures, our
business and results of operations will be seriously harmed.

WE EXPECT THAT SUBSTANTIALLY ALL OF OUR REVENUE WILL BE GENERATED FROM A LIMITED
NUMBER OF CUSTOMERS, AND OUR REVENUE IS SUBSTANTIALLY DEPENDENT UPON SALES OF
PRODUCTS TO THESE CUSTOMERS

         We currently have a limited number of customers, one of whom, Williams
Communications, accounted for 47%, 92%, and 100% of our revenue during fiscal
2001, 2000 and 1999, respectively. Another customer, 360networks, accounted for
11% of our revenue in fiscal 2001. As a result of unfavorable economic and other
conditions, several of our largest customers to date, including Williams and
360networks, have slowed their capital expenditures and decreased their rate of
ordering products from us. In any given quarter, a relatively small number of
customers typically comprise a large percentage of total revenue, though the
composition of these customers may vary from quarter to quarter. For the nine
months ended April 27, 2002, two international customers represented the
majority of the Company's revenue.

         Historically, a large percentage of our sales have been made to
emerging carriers such as Williams and 360networks. Many of these emerging
carriers have experienced severe financial difficulties, causing them to
dramatically reduce their capital expenditures, and in some cases, file for
bankruptcy protection. As a result, we believe that sales to emerging carriers
are likely to

                                       18



remain at reduced levels. To be successful, we will need to increase our sales
to incumbent carriers, which typically have longer sales evaluation cycles and
have also reduced their capital spending plans. In addition, we have relatively
limited experience in selling our products to incumbent carriers. There can be
no assurance that we will be successful in increasing our sales to incumbent
carriers.

          None of our customers are contractually committed to purchase any
minimum quantities of products from us. We expect that in the foreseeable future
a majority of our revenue will continue to depend on sales of our intelligent
optical networking products to a limited number of customers. The rate at which
our current and prospective customers purchase products from us will depend, in
part, on their success in selling communications services based on these
products to their own customers. Many incumbent carriers have recently announced
reductions in their capital expenditure budgets, reduced their revenue
forecasts, or announced restructurings. Any failure of current or prospective
customers to purchase products from us for any reason, including any
determination not to install our products in their networks or a downturn in
their business, would seriously harm our financial condition or results of
operations.

WE EXPECT GROSS MARGINS TO REMAIN AT REDUCED LEVELS IN THE NEAR TERM

          Our gross margins declined significantly compared to historical levels
beginning in the third quarter of fiscal 2001. For the first nine months of
fiscal 2002, after excluding the effect of special charges, our gross profit was
9% of revenue, as compared to 47% of revenue for the first half of fiscal 2001.
We currently anticipate that gross margins are likely to continue to be
adversely affected by several factors, including reduced demand for our
products, the effects of new product introductions including volumes and
manufacturing efficiencies, component limitations, the mix of products and
services sold, competitive pricing, and possible increases in inventory levels
which could increase our exposure to excess and obsolete inventory charges, such
as the charge which occurred in the first quarter of fiscal 2002.

CURRENT ECONOMIC CONDITIONS COMBINED WITH OUR LIMITED OPERATING HISTORY MAKES
FORECASTING DIFFICULT

          Current economic conditions in the telecommunications industry,
combined with our operating history, make it difficult to accurately forecast
revenue, and there is limited historical data upon which to base our planned
operating expenses. At the present time, our operating expenses are largely
based on the requirements that we believe are necessary to support sales to
incumbent carriers, and a high percentage of these expenses are and will
continue to be fixed. Our ability to sell products and the level of success, if
any, we may achieve depend, among other things, upon the level of demand for
intelligent optical networking products, which continues to be a rapidly
evolving market. In addition, we continue to have limited visibility into the
capital spending plans of our current and prospective customers, which increases
the difficulty of forecasting our revenue or predicting any recovery in capital
spending trends. We have directed our sales efforts towards incumbent carriers,
many of which have historically financed their capital expenditures using
significant amounts of debt. In recent months, many of these incumbent carriers
have come under increased scrutiny from credit rating agencies and investors due
to their relatively high debt levels, which may limit their ability to make
future equipment purchases. We expect that these conditions are likely to
continue to limit our ability to forecast our revenue. If operating results are
below the expectations of our investors and market analysts, this could cause
declines in the price of our common stock.

OUR FAILURE TO GENERATE SUFFICIENT REVENUE WOULD PREVENT US FROM ACHIEVING
PROFITABILITY

          Beginning in the third quarter of fiscal 2001, our revenue has
declined considerably and we have incurred significant operating losses since
that time. As of April 27, 2002, we had an accumulated deficit of $607.6
million. We cannot assure you that our revenue will increase or that we will
generate sufficient revenue to achieve or sustain profitability. While we have
implemented restructuring programs designed to decrease the Company's business
expenses, we will continue to have large fixed expenses and we expect to
continue to incur significant sales and marketing, product development, customer
support and service, administrative and other expenses. As a result, we will
need to generate significantly higher revenue over the current levels in order
to achieve and maintain profitability.

THE UNPREDICTABILITY OF OUR QUARTERLY RESULTS MAY ADVERSELY AFFECT THE TRADING
PRICE OF OUR COMMON STOCK

          Our revenue and operating results have varied significantly from
quarter to quarter. For example, from the fourth quarter of fiscal 1999 through
the second quarter of fiscal 2001, our revenue increased each quarter
sequentially compared to the previous quarter. However, beginning in the third
quarter of fiscal 2001, our revenue declined due to a sudden and severe decline
in the

                                       19



purchasing patterns of our customers, and as a result, we have incurred
significant operating losses since that time. We believe that our revenue and
operating results are likely to continue to vary significantly from quarter to
quarter due to a number of factors, many of which are outside of our control and
any of which may cause our stock price to fluctuate. The primary factors that
may affect us include the following:

     * fluctuation in demand for intelligent optical networking products;

     * the timing and size of sales of our products;

     * the length and variability of the sales cycle for our products, which we
     believe is increasing in length, due to overall market conditions and our
     emphasis on selling to incumbent carriers;

     * the timing of recognizing revenue and deferred revenue;

     * new product introductions and enhancements by our competitors and
     ourselves;

     * changes in our pricing policies or the pricing policies of our
     competitors;

     * our ability to develop, introduce and ship new products and product
     enhancements that meet customer requirements in a timely manner;

     * delays or cancellations by customers;

     * our ability to obtain sufficient supplies of sole or limited source
     components;

     * increases in the prices of the components we purchase;

     * our ability to attain and maintain production volumes and quality levels
     for our products;

     * manufacturing lead times;

     * the timing and level of prototype expenses;

     * costs related to acquisitions of technology or businesses;

     * general economic conditions as well as those specific to the
     telecommunications, Internet and related industries.

          While we have implemented restructuring and cost control programs, we
plan to continue to invest in our business, to continue to maintain a strong
product development and customer support infrastructure that will enable us to
move quickly when economic conditions improve. Our operating expenses are
largely based on the requirements that we believe are necessary to support sales
to incumbent carriers, and a high percentage of our expenses are, and will
continue to be, fixed. As a result, we currently expect to continue to incur
operating losses unless revenue increases significantly above the current
levels.

          Due to the foregoing factors, we believe that quarter-to-quarter
comparisons of our operating results are not a good indication of our future
performance. You should not rely on our results for one quarter as any
indication of our future performance. Occurrences of the foregoing factors are
extremely difficult to predict. In addition, our ability to forecast our future
business has been significantly impaired by the general economic downturn. As a
result, our future operating results may be below our expectations or those of
public market analysts and investors, and our net sales may continue to decline
or recover at a slower rate than anticipated by us or analysts and investors. In
either event, the price of our common stock could decrease.

OUR PRODUCTS ARE COMPLEX AND ARE DEPLOYED IN COMPLEX ENVIRONMENTS AND MAY HAVE
ERRORS OR DEFECTS THAT WE FIND ONLY AFTER FULL DEPLOYMENT, WHICH COULD SERIOUSLY
HARM OUR BUSINESS

          Our intelligent optical networking products are complex and are
designed to be deployed in large and complex networks. Our customers may
discover errors or defects in the hardware or the software, or the product may
not operate as expected after it has been fully deployed. From time to time,
there may be interruptions or delays in the deployment of our products due to
product performance problems or post delivery obligations. If we are unable to
fix errors or other problems, or if our customers experience interruptions or
delays that cannot be promptly resolved, we could experience:

                                       20



     * loss of or delay in revenue and loss of market share;

     * loss of customers;

     * failure to attract new customers or achieve market acceptance;

     * diversion of development resources;

     * increased service and warranty costs;

     * delays in collecting accounts receivable;

     * legal actions by our customers; and

     * increased insurance costs,

any of which could seriously harm our financial condition or results of
operations.

THE LONG AND VARIABLE SALES CYCLES FOR OUR PRODUCTS MAY CAUSE REVENUE AND
OPERATING RESULTS TO VARY SIGNIFICANTLY FROM QUARTER TO QUARTER

          A customer's decision to purchase our intelligent optical networking
products involves a significant commitment of its resources and a lengthy
evaluation, testing and product qualification process. As a result, our sales
cycle is lengthy and recently has increased in length, as we have directed our
sales efforts towards incumbent carriers. Throughout the sales cycle, we spend
considerable time and expense educating and providing information to prospective
customers about the use and features of our products. Even after making a
decision to purchase our products, we believe that most customers will deploy
the products slowly and deliberately. Timing of deployment can vary widely and
depends on the economic environment of our customers, the skills of our
customers, the size of the network deployment and the complexity of our
customers' network environment. Customers with complex networks usually expand
their networks in large increments on a periodic basis. Accordingly, we may
receive purchase orders for significant dollar amounts on an irregular and
unpredictable basis. Because of our limited operating history and the nature of
our business, we cannot predict these sales and deployment cycles. The long
sales cycles, as well as our expectation that customers will tend to
sporadically place large orders with short lead times, may cause our revenue and
results of operations to vary significantly and unexpectedly from quarter to
quarter.

                                       21



WE MAY NOT BE SUCCESSFUL IF OUR CUSTOMER BASE DOES NOT GROW

          Our future success will depend on our attracting additional customers.
Due to the overall economic downturn in our industry and the financial
difficulties experienced by emerging carriers, the number of potential customers
for our products at the current time has been reduced. Our ability to attract
new customers could also be adversely affected by:

     * customer unwillingness to implement our optical networking architecture;

     * any delays or difficulties that we may incur in completing the
     development, introduction and production manufacturing of our planned
     products or product enhancements;

     * new product introductions by our competitors;

     * any failure of our products to perform as expected; or

     * any difficulty we may incur in meeting customers' delivery, installation
     or performance requirements.

OUR BUSINESS IS SUBJECT TO RISKS FROM INTERNATIONAL OPERATIONS

          International sales represented 35% of total revenue in fiscal 2001,
and a substantial majority of total revenue in the first three quarters of
fiscal 2002, and we expect that international sales will continue to represent a
significant portion of our revenue. Doing business internationally requires
significant management attention and financial resources to successfully develop
direct and indirect sales channels and to support customers in international
markets. While international sales currently represent a high percentage of
total revenue, these sales are concentrated within a relatively small number of
customers. We may not be able to maintain or expand international market demand
for our products.

          We have relatively limited experience in marketing, distributing and
supporting our products internationally and to do so, we expect that we will
need to develop versions of our products that comply with local standards. In
addition, international operations are subject to other inherent risks,
including:

     * greater difficulty in accounts receivable collection and longer
     collection periods;

     * difficulties and costs of staffing and managing foreign operations in
     compliance with local laws and customs;

     * necessity to work with third parties in certain countries to perform
     installation and obtain customer acceptance, and the resulting impact on
     revenue recognition;

     * the impact of recessions in economies outside the United States;

     * unexpected changes in regulatory requirements, including trade protection
     measures and import and licensing requirements;

     * certification requirements;

     * currency fluctuations;

     * reduced protection for intellectual property rights in some countries;

     * potentially adverse tax consequences; and

     * political and economic instability, particularly in emerging markets.

                                       22



WE RELY ON SINGLE SOURCES FOR SUPPLY OF CERTAIN COMPONENTS AND OUR BUSINESS MAY
BE SERIOUSLY HARMED IF OUR SUPPLY OF ANY OF THESE COMPONENTS OR OTHER COMPONENTS
IS DISRUPTED

          We currently purchase several key components, including commercial
digital signal processors, RISC processors, field programmable gate arrays,
SONET transceivers and erbium doped fiber amplifiers, from single or limited
sources. We purchase each of these components on a purchase order basis and have
no long-term contracts for these components. Although we believe that there are
alternative sources for each of these components, in the event of a disruption
in supply, we may not be able to develop an alternate source in a timely manner
or at favorable prices. Such a failure could hurt our ability to deliver our
products to our customers and negatively affect our operating margins. In
addition, our reliance on our suppliers exposes us to potential supplier
production difficulties or quality variations. For example, component yield
limitations negatively impacted our ability to manufacture and meet customer
demand for the SN 16000 product during fiscal 2001. While these yield
limitations have since been resolved, any future disruption in supply could
seriously impact our revenue and results of operations.

          During the past year, the optical component industry has been
downsizing manufacturing capacity while consolidating product lines from earlier
acquisitions. This business environment could impact product deliveries and
result in the consolidation of product offerings. Because optical components are
integrated into our products, the business environment for optical component
manufacturers could negatively impact our revenue and results of operations.

WE DEPEND UPON CONTRACT MANUFACTURERS AND ANY DISRUPTION IN THESE RELATIONSHIPS
MAY CAUSE US TO FAIL TO MEET THE DEMANDS OF OUR CUSTOMERS AND DAMAGE OUR
CUSTOMER RELATIONSHIPS

          We have limited internal manufacturing capabilities. We rely on
contract manufacturers to manufacture our products in accordance with our
specifications and to fill orders on a timely basis. Currently, the majority of
our products are produced under an agreement with Jabil Circuit, Inc., which
provides comprehensive manufacturing services, including assembly, test, control
and shipment to our customers, and procures material on our behalf. During the
normal course of business, we may provide demand forecasts to our contract
manufacturers up to six months prior to scheduled delivery of products to our
customers. If we overestimate our requirements, the contract manufacturers may
assess cancellation penalties or we may have excess inventory which could
negatively impact our gross margins. If we underestimate our requirements, the
contract manufacturers may have inadequate inventory, which could interrupt
manufacturing of our products and result in delays in shipment to our customers
and revenue recognition. During the first quarter of fiscal 2002, we recorded an
excess inventory charge of $102.4 million due to a severe decline in our
forecasted revenue. A portion of this charge was related to inventory purchase
commitments.

          We may not be able to effectively manage our relationship with our
contract manufacturers, and such contract manufacturers may not meet our future
requirements for timely delivery. Our contract manufacturers also build products
for other companies, and we cannot assure you that they will always have
sufficient quantities of inventory available to fill orders placed by our
customers or that they will allocate their internal resources to fill these
orders on a timely basis. In addition, our reliance on contract manufacturers
limits our ability to control the manufacturing processes of our products, which
exposes us to risks including the unpredictability of manufacturing yields and a
reduced ability to control the quality of finished products.

          The contract manufacturing industry is a highly competitive,
capital-intensive business with relatively low profit margins. In addition,
there have been a number of major acquisitions within the contract manufacturing
industry in recent periods. While to date there has been no significant impact
on our contract manufacturers, future acquisitions could potentially have an
adverse effect on our working relationship with our contract manufacturers. For
example, in the event of a major acquisition involving one of our contract
manufacturers, difficulties could be encountered in the merger integration
process that could negatively impact our working relationship. Qualifying a new
contract manufacturer and commencing volume production is expensive and time
consuming and could result in a significant interruption in the supply of our
products. If we are required or choose to change contract manufacturers, we may
lose revenue and damage our customer relationships.

                                       23



IF WE DO NOT RESPOND RAPIDLY TO TECHNOLOGICAL CHANGES, OUR PRODUCTS COULD BECOME
OBSOLETE

         The market for intelligent optical networking products continues to
evolve, and has been characterized by rapid technological change, frequent new
product introductions and changes in customer requirements. We may be unable to
respond quickly or effectively to these developments. We may experience design,
manufacturing, marketing and other difficulties that could delay or prevent our
development, introduction or marketing of new products and enhancements. The
introduction of new products by competitors, market acceptance of products based
on new or alternative technologies or the emergence of new industry standards
could render our existing or future products obsolete.

         In developing our products, we have made, and will continue to make,
assumptions about the standards that may be adopted by our customers and
competitors. If the standards adopted are different from those which we have
chosen to support, market acceptance of our products may be significantly
reduced or delayed and our business will be seriously harmed. The introduction
of products incorporating new technologies and the emergence of new industry
standards could render our existing products obsolete.

         In addition, in order to introduce products incorporating new
technologies and new industry standards, we must be able to gain access to the
latest technologies of our customers, our suppliers and other network vendors.
Any failure to gain access to the latest technologies could impair the
competitiveness of our products.

CUSTOMER REQUIREMENTS ARE LIKELY TO EVOLVE, AND WE WILL NOT RETAIN CUSTOMERS OR
ATTRACT NEW CUSTOMERS IF WE DO NOT ANTICIPATE AND MEET SPECIFIC CUSTOMER
REQUIREMENTS

         Our current and prospective customers may require product features and
capabilities that our current products do not have. To achieve market acceptance
for our products, we must effectively and timely anticipate and adapt to
customer requirements and offer products and services that meet customer
demands. Our failure to develop products or offer services that satisfy customer
requirements would seriously harm our ability to increase demand for our
products.

         We intend to continue to invest in product and technology development.
The development of new or enhanced products is a complex and uncertain process
that requires the accurate anticipation of technological and market trends. We
may experience design, manufacturing, marketing and other difficulties that
could delay or prevent the development, introduction, volume production or
marketing of new products and enhancements. The introduction of new or enhanced
products also requires that we manage the transition from older products in
order to minimize disruption in customer ordering patterns and ensure that
adequate supplies of new products can be delivered to meet anticipated customer
demand. Our inability to effectively manage this transition would cause us to
lose current and prospective customers.

OUR MARKET IS HIGHLY COMPETITIVE, AND OUR FAILURE TO COMPETE SUCCESSFULLY COULD
ADVERSELY AFFECT OUR MARKET POSITION

         Competition in the public network infrastructure market is intense.
This market has historically been dominated by large companies, such as Nortel
Networks, Lucent Technologies, Alcatel and Ciena Corporation. In addition, a
number of smaller companies have either announced plans for new products or
introduced new products to address the same network problems which our products
address. Many of our current and potential competitors have significantly
greater selling and marketing, technical, manufacturing, financial and other
resources, including vendor-sponsored financing programs. Moreover, our
competitors may foresee the course of market developments more accurately and
could develop new technologies that compete with our products or even render our
products obsolete. Due to the rapidly evolving markets in which we compete,
additional competitors with significant market presence and financial resources
may enter those markets, thereby further intensifying competition.

         In order to compete effectively, we must deliver products that:

       * provide extremely high network reliability;

       * scale easily and efficiently with minimum disruption to the network;

       * interoperate with existing network designs and equipment vendors;

       * reduce the complexity of the network by decreasing the need for
       overlapping equipment;

                                       24



       * provide effective network management; and

       * provide a cost-effective solution for service providers.

         In addition, we believe that knowledge of the infrastructure
requirements applicable to service providers, experience in working with service
providers to develop new services for their customers and an ability to provide
vendor-sponsored financing, are important competitive factors in our market. We
have a limited ability to provide vendor-sponsored financing and this may
influence the purchasing decisions of prospective customers, who may decide to
purchase products from one of our competitors who are able to provide more
extensive financing programs. Furthermore, as we are increasingly directing our
sales efforts towards incumbent carriers which typically have longer sales
evaluation cycles, we believe that being able to demonstrate strong financial
viability is becoming an increasingly important consideration to our customers
in making their purchasing decisions.

         If we are unable to compete successfully against our current and future
competitors, we could experience price reductions, order cancellations and
reduced gross margins, any one of which could materially and adversely affect
our business, results of operations and financial condition.

THE INDUSTRY IN WHICH WE COMPETE IS SUBJECT TO CONSOLIDATION

         We believe that the industry in which we compete may enter into a
consolidation phase. Recently, one of our larger competitors, Ciena Corporation,
announced an agreement to acquire another company in our industry, ONI Systems.
Over the past 12-18 months, the market valuations of the majority of companies
in our industry have declined significantly, and many companies have experienced
dramatic decreases in revenue due to decreased customer demand in general, a
smaller customer base due to the financial difficulties impacting emerging
carriers, reductions in capital expenditures by incumbent carriers, and other
factors. We expect that the weakened financial position of many companies in our
industry may cause acquisition activity to increase. We believe that industry
consolidation may result in stronger competitors that are better able to compete
as sole-source vendors for customers. This could lead to more variability in
operating results as we compete to be a single vendor solution and could have a
material adverse effect on our business, operating results, and financial
condition.

THE INTELLIGENT OPTICAL NETWORKING MARKET IS EVOLVING AND OUR BUSINESS WILL
SUFFER IF IT DOES NOT DEVELOP AS WE EXPECT

         The market for intelligent optical networking products continues to
evolve. In recent periods, there has been a sharp decline in capital spending by
our current and prospective customers. We cannot assure you that a viable market
for our products will develop or be sustainable. If this market does not
develop, develops more slowly than we expect or is not sustained, our business,
results of operations and financial condition would be seriously harmed.

IF OUR PRODUCTS DO NOT INTEROPERATE WITH OUR CUSTOMERS' NETWORKS, INSTALLATIONS
WILL BE DELAYED OR CANCELLED AND WE COULD HAVE SUBSTANTIAL PRODUCT RETURNS,
WHICH COULD SERIOUSLY HARM OUR BUSINESS

         Many of our customers utilize multiple protocol standards, and each of
our customers may have different specification requirements to interface with
their existing networks. Our customers' networks contain multiple generations of
products that have been added over time as these networks have grown and
evolved. Specifically, incumbent carriers typically have less evolutionary
networks that contain more generations of products. Our products must
interoperate with all of the products within our customers' networks as well as
future products in order to meet our customers' requirements. The requirement
that we modify product design in order to achieve a sale may result in a longer
sales cycle, increased research and development expense and reduced margins on
our products. If our products do not interoperate with those of our customers'
networks, installations could be delayed, orders for our products could be
cancelled or our products could be returned. This would also seriously harm our
reputation, all of which could seriously harm our business and prospects.

                                       25



UNDETECTED SOFTWARE OR HARDWARE ERRORS AND PROBLEMS ARISING FROM USE OF OUR
PRODUCTS IN CONJUNCTION WITH OTHER VENDORS' PRODUCTS COULD RESULT IN DELAYS OR
LOSS OF MARKET ACCEPTANCE OF OUR PRODUCTS

         Networking products frequently contain undetected software or hardware
errors when first introduced or as new versions are released. We expect that
errors will be found from time to time in new or enhanced products after we
begin commercial shipments. In addition, service providers typically use our
products in conjunction with products from other vendors. As a result, when
problems occur, it may be difficult to identify the source of the problem. These
problems may cause us to incur significant warranty, support and repair costs,
divert the attention of our engineering personnel from our product development
efforts and cause significant customer relations problems. The occurrence of
these problems could result in the delay or loss of market acceptance of our
products and would likely have a material adverse effect on our business,
results of operations and financial condition. Defects, integration issues or
other performance problems in our products could result in financial or other
damages to our customers or could damage market acceptance for our products. Our
customers could also seek damages for losses from us. A product liability claim
brought against us, even if unsuccessful, would likely be time consuming and
costly.

OUR FAILURE TO ESTABLISH AND MAINTAIN KEY CUSTOMER RELATIONSHIPS MAY RESULT IN
DELAYS IN INTRODUCING NEW PRODUCTS OR CAUSE CUSTOMERS TO FOREGO PURCHASING OUR
PRODUCTS

         Our future success will also depend upon our ability to develop and
manage key customer relationships in order to introduce a variety of new
products and product enhancements that address the increasingly sophisticated
needs of our customers. Our failure to establish and maintain these customer
relationships may adversely affect our ability to develop new products and
product enhancements. In addition, we may experience delays in releasing new
products and product enhancements in the future. Material delays in introducing
new products and enhancements or our inability to introduce competitive new
products may cause customers to forego purchases of our products and purchase
those of our competitors, which could seriously harm our business.

         The majority of our product sales to date have been to emerging
carriers rather than incumbent carriers. We believe that it is important for us
to increase our sales to incumbent carriers, including incumbent local exchange
carriers such as the Regional Bell Operating Companies ("RBOCs"). Incumbent
carriers typically have longer sales evaluation cycles than emerging carriers,
and we have limited experience in selling our products to incumbent carriers. In
addition, we are currently investing in product certification standards such as
the OSMINE standard, which will be necessary for us to increase our sales to the
RBOCs. While we have made a commitment to invest resources in obtaining these
certification standards, there is no assurance that such efforts will enable us
to increase our sales to incumbent carriers. Any failure to establish or
maintain strong customer relationships would likely have a material adverse
effect on our business and results of operations.

OUR FAILURE TO CONTINUALLY IMPROVE OUR INTERNAL CONTROLS AND SYSTEMS, AND RETAIN
NEEDED PERSONNEL COULD ADVERSELY AFFECT OUR RESULTS OF OPERATIONS

           Since inception, the scope of our operations has increased and we
have grown our headcount substantially. However, beginning in the third quarter
of fiscal 2001, our headcount levels have been reduced significantly, due
primarily to our restructuring activities. At April 27, 2002, we had a total of
665 employees, which represents a reduction of approximately 40% from headcount
levels immediately prior to the restructuring actions. Our initial growth,
followed by more recent headcount reductions, has placed a significant strain on
our management systems and resources. Our ability to successfully offer our
products and services and implement our business plan in a rapidly evolving
market requires an effective planning and management process. We expect that we
will need to continue to improve our financial, managerial and manufacturing
controls and reporting systems, and will need to effectively manage our
headcount levels worldwide. We may not be able to implement adequate control
systems in an efficient and timely manner. In spite of recent economic
conditions, competition for highly skilled personnel is intense, especially in
the New England area where we are headquartered. Any failure to attract,
assimilate or retain qualified personnel to fulfill our current or future needs
could adversely affect our results of operations.

                                       26



WE DEPEND ON OUR KEY PERSONNEL TO MANAGE OUR BUSINESS EFFECTIVELY IN A RAPIDLY
CHANGING MARKET, AND IF WE ARE UNABLE TO RETAIN OUR KEY EMPLOYEES, OUR ABILITY
TO COMPETE COULD BE HARMED

         We depend on the continued services of our executive officers and other
key engineering, sales, marketing and support personnel, who have critical
industry experience and relationships that we rely on to implement our business
plan. None of our officers or key employees is bound by an employment agreement
for any specific term. We do not have "key person" life insurance policies
covering any of our employees. All of our key employees have been granted
stock-based awards which are intended to represent an integral component of
their compensation package. These stock-based awards may not provide the
intended incentive to our employees if our stock price declines or experiences
significant volatility. The loss of the services of any of our key employees,
the inability to attract and retain qualified personnel in the future, or delays
in hiring qualified personnel could delay the development and introduction of,
and negatively impact our ability to sell, our products.

IF WE BECOME SUBJECT TO UNFAIR HIRING, WRONGFUL TERMINATION OR OTHER EMPLOYMENT
RELATED CLAIMS, WE COULD INCUR SUBSTANTIAL COSTS IN DEFENDING OURSELVES

         Companies in our industry, whose employees accept positions with
competitors, frequently claim that their competitors have engaged in unfair
hiring practices. We cannot assure you that we will not receive claims of this
kind or other claims relating to our employees, or that those claims will not
result in material litigation. During the third quarter of fiscal 2001 and the
first quarter of fiscal 2002, we terminated approximately 371 employees in
response to changing business conditions, and as a result, we may face claims
relating to their compensation and/or wrongful termination based on
discrimination. We could incur substantial costs in defending ourselves or our
employees against such claims, regardless of their merits. In addition,
defending ourselves or our employees against such claims could divert the
attention of our management away from our operations.

OUR ABILITY TO COMPETE COULD BE JEOPARDIZED IF WE ARE UNABLE TO PROTECT OUR
INTELLECTUAL PROPERTY RIGHTS FROM THIRD-PARTY CHALLENGES

         We rely on a combination of patent, copyright, trademark and trade
secret laws and restrictions on disclosure to protect our intellectual property
rights. We also enter into confidentiality or license agreements with our
employees, consultants and corporate partners and control access to and
distribution of our software, documentation and other proprietary information.
Despite our efforts to protect our proprietary rights, unauthorized parties may
attempt to copy or otherwise obtain and use our products or technology.

         Monitoring unauthorized use of our products is difficult and we cannot
be certain that the steps we have taken will prevent unauthorized use of our
technology, particularly in foreign countries where the laws may not protect our
proprietary rights as fully as in the United States. If competitors are able to
use our technology, our ability to compete effectively could be harmed.

IF NECESSARY LICENSES OF THIRD-PARTY TECHNOLOGY ARE NOT AVAILABLE TO US OR ARE
VERY EXPENSIVE, THE COMPETITIVENESS OF OUR PRODUCTS COULD BE IMPAIRED

         From time to time we may be required to license technology from third
parties to develop new products or product enhancements. We cannot assure you
that third-party licenses will be available to us on commercially reasonable
terms, if at all. The inability to obtain any third-party license required to
develop new products and product enhancements could require us to obtain
substitute technology of lower quality or performance standards or at greater
cost, either of which could seriously harm the competitiveness of our products.

WE COULD BECOME SUBJECT TO CLAIMS REGARDING INTELLECTUAL PROPERTY RIGHTS, WHICH
COULD SERIOUSLY HARM OUR BUSINESS AND REQUIRE US TO INCUR SIGNIFICANT COSTS

         In recent years, there has been significant litigation in the United
States involving patents and other intellectual property rights. Our industry in
particular is characterized by the existence of a large number of patents and
frequent claims and related litigation regarding patents and other intellectual
property rights. In the course of our business, we may receive claims of
infringement or otherwise become aware of potentially relevant patents or other
intellectual property rights held by other parties. We evaluate the validity and
applicability of these intellectual property rights, and determine in each case
whether we must negotiate licenses or cross-licenses to incorporate or use the
proprietary technologies in our products.

         Any parties asserting that our products infringe upon their proprietary
rights would force us to defend ourselves and possibly our customers,
manufacturers or suppliers against the alleged infringement. Regardless of their
merit, these claims could result in costly litigation and subject us to the risk
of significant liability for damages. These claims, again regardless of their
merit, would likely be time consuming and expensive to resolve, would divert
management time and attention and would put the Company at risk to:

                                       27



         * stop selling, incorporating or using our products that use the
         challenged intellectual property;

         * obtain from the owner of the intellectual property right a license to
         sell or use the relevant technology, which license may not be available
         on reasonable terms, or at all;

         * redesign those products that use such technology; or

         * accept a return of products that use such technologies.

         If we are forced to take any of the foregoing actions, our business may
         be seriously harmed.

ANY ACQUISITIONS OR STRATEGIC INVESTMENTS WE MAKE COULD DISRUPT OUR BUSINESS AND
SERIOUSLY HARM OUR FINANCIAL CONDITION

         As part of our ongoing business development strategy, we consider
acquisitions and strategic investments in complementary companies, products or
technologies. We completed the acquisition of Sirocco Systems, Inc. in September
2000, and may consider making other acquisitions from time to time. In the event
of an acquisition, we could:

       * issue stock that would dilute our current stockholders' percentage
       ownership;

       * consume cash, which would reduce the amount of cash available for other
       purposes;

       * incur debt;

       * assume liabilities;

       * increase our ongoing operating expenses and level of fixed costs;

       * record goodwill and non-amortizable intangible assets that will be
       subject to impairment testing and potential periodic impairment charges;

       * incur amortization expenses related to certain intangible assets;

       * incur large and immediate write-offs; or

       * become subject to litigation;

         Our ability to achieve the benefits of any acquisition, will also
involve numerous risks, including:

       * problems combining the purchased operations, technologies or products;

       * unanticipated costs;

       * diversion of management's attention from other business issues and
       opportunities;

       * adverse effects on existing business relationships with suppliers and
       customers;

       * risks associated with entering markets in which we have no or limited
       prior experience; and

       * problems with integrating employees and potential loss of key
       employees.

         We cannot assure you that we will be able to successfully integrate any
businesses, products, technologies or personnel that we might acquire in the
future and any failure to do so could disrupt our business and seriously harm
our financial condition.

         As of April 27, 2002, we have made strategic investments in privately
held companies totaling approximately $26.0 million, and we may decide to make
additional investments in the future. During the first quarter of fiscal 2002,
we recorded impairment losses of $22.7 million relating to these investments.
These types of investments are inherently risky as the market for

                                       28



the technologies or products they have under development are typically in the
early stages and may never materialize. We could lose our entire investment in
certain or all of these companies.

          Our strategic investments in privately held companies include an
investment of $2.2 million in Tejas Networks India Private Limited ("Tejas"),
which was made during the fiscal year ended July 31, 2001. The Chairman of the
Board of Sycamore also serves as the Chairman of the Board of Tejas. We have no
obligation to provide any additional funding to Tejas, and have not engaged in
any material transactions with Tejas since the date of our original investment.

ANY EXTENSION OF CREDIT TO OUR CUSTOMERS MAY SUBJECT US TO CREDIT RISKS AND
LIMIT THE CAPITAL THAT WE HAVE AVAILABLE FOR OTHER USES

          We are experiencing increased demands for customer financing and we
expect these demands to continue. We believe it is a competitive factor in
obtaining business. From time to time we have provided extended payment terms on
trade receivables to certain key customers to assist them with their network
deployment plans. In addition, we may provide or commit to extend additional
credit or credit support, such as vendor financing, to our customers as we
consider appropriate in the course of our business. Such financing activities
subject us to the credit risk of customers whom we finance. In addition, our
ability to recognize revenue from financed sales will depend upon the relative
financial condition of the specific customer, among other factors. Although we
have programs in place to monitor the risk associated with vendor financing, we
cannot assure you that such programs will be effective in reducing our risk of
an impaired ability to pay on the part of a customer whom we have financed. We
could experience losses due to customers failing to meet their financial
obligations which could harm our business and materially adversely affect our
operating results and financial condition, such as the losses that we incurred
during the first quarter of fiscal 2002.

          During the first quarter of fiscal 2002, we experienced losses
relating to our two existing vendor financing customers, as each of them
experienced a significant deterioration in their financial condition. As a
result, we determined that we were unlikely to realize any significant proceeds
from these vendor financing agreements. Accordingly, we recorded an impairment
charge for the assets related to these financing agreements, which consisted of
the cost of the systems shipped to the vendor financing customers, and had been
recorded in other long-term assets.

RISKS RELATED TO THE SECURITIES MARKET

OUR STOCK PRICE MAY CONTINUE TO BE VOLATILE

          Historically, the market for technology stocks has been extremely
volatile. Our common stock has experienced, and may continue to experience,
substantial price volatility. The following factors could cause the market price
of our common stock to fluctuate significantly:

     * our loss of a major customer;

     * significant changes or slowdowns in the funding and spending patterns of
     our current and prospective customers;

     * the addition or departure of key personnel;

     * variations in our quarterly operating results;

     * announcements by us or our competitors of significant contracts, new
     products or product enhancements;

     * failure by us to meet product milestones;

     * acquisitions, distribution partnerships, joint ventures or capital
     commitments;

     * variations between our actual results and the published expectations of
     analysts;

     * changes in financial estimates by securities analysts;

     * sales of our common stock or other securities in the future;

     * changes in market valuations of networking and telecommunications
     companies; and

     * fluctuations in stock market prices and volumes.

                                       29



          In addition, the stock market in general, and the Nasdaq National
Market and technology companies in particular, have experienced extreme price
and volume fluctuations that have often been unrelated or disproportionate to
the operating performance of such companies. These broad market and industry
factors may materially adversely affect the market price of our common stock,
regardless of our actual operating performance. In the past, following periods
of volatility in the market price of a company's securities, securities
class-action litigation has often been instituted against such companies.

          Beginning on July 2, 2001, several purported securities class action
complaints were filed against the Company, several of its officers and directors
and the Company's lead underwriters in connection with the Company's initial
public offering and follow-on offering. The Company believes that the claims
against it are without merit and intends to defend against the complaints
vigorously. However, defending the Company and its officers against these
complaints may result in substantial costs and a diversion of management's
attention and resources. See Part II, Item 1 - Legal Proceedings for additional
details regarding these cases.

THERE MAY BE SALES OF A SUBSTANTIAL AMOUNT OF OUR COMMON STOCK THAT COULD CAUSE
OUR STOCK PRICE TO FALL, OR INCREASE THE VOLATILITY OF OUR STOCK PRICE

          As of April 27, 2002, options to purchase a total of 29.7 million
shares of our common stock were outstanding. Included in this amount were
options to purchase approximately 12.6 million shares that were issued during
the second quarter of fiscal 2002, in accordance with the terms of an option
exchange program in which most of our employees were eligible to participate.
While these options are subject to vesting schedules, a number of the shares
underlying these options are freely tradable. Sales of a substantial number of
shares of our common stock could cause our stock price to fall or increase the
volatility of our stock price. In addition, sales of shares by our stockholders
could impair our ability to raise capital through the sale of additional stock.

INSIDERS OWN A SUBSTANTIAL NUMBER OF SYCAMORE SHARES AND COULD LIMIT YOUR
ABILITY TO INFLUENCE THE OUTCOME OF KEY TRANSACTIONS, INCLUDING CHANGES OF
CONTROL

          As of April 27, 2002, the executive officers, directors and entities
affiliated with them, in the aggregate, beneficially owned approximately 39.6%
of our outstanding common stock. These stockholders, if acting together, would
be able to significantly influence matters requiring approval by our
stockholders, including the election of directors and the approval of mergers or
other business combination transactions.

PROVISIONS OF OUR CHARTER DOCUMENTS AND DELAWARE LAW MAY HAVE ANTI-TAKEOVER
EFFECTS THAT COULD PREVENT A CHANGE OF CONTROL

          Provisions of our amended and restated certificate of incorporation,
by-laws, and Delaware law could make it more difficult for a third party to
acquire us, even if doing so would be beneficial to our stockholders.

                                       30



ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK

     The following discussion about our market risk involves forward-looking
statements. Actual results could differ materially from those projected in the
forward-looking statements. We are exposed to market risk related to changes in
interest rates and foreign currency exchange rates. We do not use derivative
financial instruments for speculative or trading purposes.

Interest Rate Sensitivity

     We maintain a portfolio of cash equivalents and short-term and long-term
investments in a variety of securities including: commercial paper, certificates
of deposit, money market funds and government and non-government debt
securities. These available-for-sale securities are subject to interest rate
risk and may fall in value if market interest rates increase. If market interest
rates increase immediately and uniformly by 10 percent from levels at April 27,
2002, the fair value of the portfolio would decline by approximately $1.2
million. We have the ability to hold our fixed income investments until
maturity, and therefore do not expect our operating results or cash flows to be
affected to any significant degree by the effect of a sudden change in market
interest rates on our securities portfolio.

Exchange Rate Sensitivity

          We operate primarily in the United States, and the majority of our
sales to date have been made in US dollars. However, our business has become
increasingly global, with international revenue representing 35% of total
revenue in fiscal 2001, and a substantial majority of total revenue in the first
three quarters of fiscal 2002. We anticipate that international sales will
continue to represent a significant portion of total revenue. As a result, we
expect that sales in non-dollar currencies and our exposure to foreign currency
exchange rate fluctuations are likely to increase. To date, international sales
that create exposure to foreign currency exchange rate fluctuations have been
made primarily in British Pounds and Japanese Yen. We are prepared to hedge
against fluctuations in foreign currencies if the exposure is material, although
we have not engaged in hedging activities to date.

PART II. OTHER INFORMATION

Item 1. Legal Proceedings

Beginning on July 2, 2001, several purported class action complaints were filed
in the United States District Court for the Southern District of New York
against the Company and several of its officers and directors and the
underwriters for the Company's initial public offering on October 21, 1999. Some
of the complaints also include the underwriters for the Company's follow-on
offering on March 14, 2000. The complaints were consolidated into a single
action and an amended complaint was filed on April 19, 2002. The amended
complaint was filed on behalf of persons who purchased the Company's common
stock between October 21, 1999 and December 6, 2000. The amended complaint
alleges violations of the Securities Act of 1933, as amended, and the Securities
Exchange Act of 1934, as amended, primarily based on the assertion that the
Company's lead underwriters, the Company and the other named defendants made
material false and misleading statements in the Company's Registration
Statements and Prospectuses filed with the SEC in October 1999 and March 2000
because of the failure to disclose (a) the alleged solicitation and receipt of
excessive and undisclosed commissions by the underwriters in connection with the
allocation of shares of common stock to certain investors in the Company's
public offerings and (b) that certain of the underwriters allegedly had entered
into agreements with investors whereby underwriters agreed to allocate the
public offering shares in exchange for which the investors agreed to make
additional purchases of stock in the aftermarket at pre-determined prices. The
amended complaint alleges claims against the Company, several of the Company's
officers and directors and the underwriters under Sections 11 and 15 of the
Securities Act. It also alleges claims against the Company, the individual
defendants and the underwriters under Sections 10(b) and 20(a) of the Securities
Exchange Act. The action against the Company is being coordinated with over
three hundred other nearly identical actions filed against other companies. No
date has been set for a response to the amended complaint. The actions seek
damages in an unspecified amount. The Company believes that the claims against
it are without merit and intends to defend against the complaints vigorously.
The Company is not currently able to estimate the possibility of loss or range
of loss, if any, relating to these claims.

The Company is subject to legal proceedings, claims, and litigation arising in
the ordinary course of business. While the outcome of these matters is currently
not determinable, management does not expect that the ultimate costs to resolve
these matters will have a material adverse effect on the Company's results of
operations or financial position.

                                       31



ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K

Exhibits:

(a) List of Exhibits

     Number    Exhibit Description
     ------    -------------------

      3.1      Amended and Restated Certificate of Incorporation of the Company
               (2)

      3.2      Certificate of Amendment to the Amended and Restated Certificate
               of Incorporation of the Company (2)

      3.3      Certificate of Amendment to the Amended and Restated Certificate
               of Incorporation of the Company (3)

      3.4      Amended and Restated By-Laws of the Company (2)

      4.1      Specimen common stock certificate (1)

      4.2      See Exhibits 3.1, 3.2, 3.3 and 3.4, for provisions of the
               Certificate of Incorporation and By-Laws of the Registrant
               defining the rights of holders of common stock of the Company
               (2)(3)
      4.3      Second Amended and Restated Investor Rights Agreement dated
               February 26, 1999, as amended by Amendment No. 1 dated as of July
               23, 1999 (1)
      4.4      Amendment No. 2 dated as of August 5, 1999 to the Second Amended
               and Restated Investor Rights Agreement dated February 26, 1999
               (2)
      4.5      Amendment No. 3 dated as of September 20, 1999 to the Second
               Amended and Restated Investor Rights Agreement dated February 26,
               1999 (2)
      4.6      Amendment No. 4 dated as of February 11, 2000 to the Second
               Amended and Restated Investor Rights Agreement dated February 26,
               1999 (2)


(1)    Incorporated by reference to Sycamore Networks Inc.'s Registration
       Statement on Form S-1 (Registration Statement No. 333-84635).

(2)    Incorporated by reference to Sycamore Networks Inc.'s Registration
       Statement on Form S-1 (Registration Statement File No. 333-30630).

(3)    Incorporated by reference to Sycamore Networks Inc.'s Quarterly Report on
       Form 10-Q for the quarterly period ended January 27, 2001 filed with the
       Commission on March 13, 2001.

(b) Reports on Form 8-K : None

                                       32



SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

Sycamore Networks, Inc.

/s/ Frances M. Jewels
- ---------------------

Frances M. Jewels
Chief Financial Officer
(Duly Authorized Officer and Principal Financial and Accounting Officer)

Dated: June 7, 2002

                                       33



     EXHIBIT INDEX

     Number    Exhibit Description
     ------    -------------------

      3.1      Amended and Restated Certificate of Incorporation of the Company
               (2)

      3.2      Certificate of Amendment to the Amended and Restated Certificate
               of Incorporation of the Company (2)

      3.3      Certificate of Amendment to the Amended and Restated Certificate
               of Incorporation of the Company (3)

      3.4      Amended and Restated By-Laws of the Company (2)

      4.1      Specimen common stock certificate (1)

      4.2      See Exhibits 3.1, 3.2, 3.3 and 3.4, for provisions of the
               Certificate of Incorporation and By-Laws of the Registrant
               defining the rights of holders of common stock of the Company
               (2)(3)
      4.3      Second Amended and Restated Investor Rights Agreement dated
               February 26, 1999, as amended by Amendment No. 1 dated as of July
               23, 1999 (1)
      4.4      Amendment No. 2 dated as of August 5, 1999 to the Second Amended
               and Restated Investor Rights Agreement dated February 26, 1999
               (2)
      4.5      Amendment No. 3 dated as of September 20, 1999 to the Second
               Amended and Restated Investor Rights Agreement dated February 26,
               1999 (2)
      4.6      Amendment No. 4 dated as of February 11, 2000 to the Second
               Amended and Restated Investor Rights Agreement dated February 26,
               1999 (2)


(1)    Incorporated by reference to Sycamore Networks Inc.'s Registration
       Statement on Form S-1 (Registration Statement No. 333-84635).

(2)    Incorporated by reference to Sycamore Networks Inc.'s Registration
       Statement on Form S-1 (Registration Statement File No. 333-30630).

(3)    Incorporated by reference to Sycamore Networks Inc.'s Quarterly Report on
       Form 10-Q for the quarterly period ended January 27, 2001 filed with the
       Commission on March 13, 2001.

                                       34