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 JANUARY 27, 2001

                                       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 333-25853

                            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 Number)



                               150 Apollo Drive
                             Chelmsford, MA 01824
                                (978) 250-2900
    (Address Including Zip Code and Telephone Number, Including Area Code,
                 of Registrant's Principal Executive Offices)

                                     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 February
28, 2001 was 273,371,380.


Sycamore Networks, Inc.




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

Item 1.       Financial Statements

              Consolidated Balance Sheets as of January 27, 2001 and July 31, 2000                     3

              Consolidated Statements of Operations for the three and six months
              ended January 27, 2001 and January 29, 2000                                              4

              Consolidated Statements of Cash Flows for the six months
              ended January 27, 2001 and January 29, 2000                                              5

              Notes to Consolidated Financial Statements                                               6

Item 2.       Management's Discussion and Analysis of Financial
              Condition and Results of Operations                                                      9

Item 3.       Quantitative and Qualitative Disclosure About Market Risk                               22

Part II.      Other Information

Item 1.       Legal Proceedings                                                                       22

Item 2.       Changes in Securities and Use of Proceeds                                               22

Item 4.       Submission of Matters to a Vote of Security Holders                                     23

Item 6.       Exhibits and Reports on Form 8-K                                                        24

              Signature                                                                               25

              Exhibit Index                                                                           26


                                      -2-


Part I. Financial Information
ITEM 1. FINANCIAL STATEMENTS

SYCAMORE NETWORKS, INC.
CONSOLIDATED BALANCE SHEETS
(IN THOUSANDS, EXCEPT SHARE DATA)



                                                                                            January 27,         July 31,
                                                                                                2001              2000

                                                                                            -----------------------------
                                                                                                        
Assets
Current assets:
  Cash and cash equivalents                                                                   $  321,406       $  429,965
  Marketable securities                                                                          653,509          710,398
  Accounts receivable, net of allowance for doubtful accounts
   of $604 and $0 at January 27, 2001 and July 31, 2000,
   respectively                                                                                   94,569           43,407
  Inventories                                                                                     65,953           39,739
  Prepaids and other current assets                                                               17,125           25,932
                                                                                            -----------------------------
Total current assets                                                                           1,152,562        1,249,441

Property and equipment, net                                                                      106,729           42,840
Marketable securities                                                                            461,651          376,740
Other assets                                                                                      71,972           28,894
                                                                                            -----------------------------
Total assets                                                                                  $1,792,914       $1,697,915
                                                                                            =============================

Liabilities and stockholders' equity
Current liabilities:

  Accounts payable                                                                            $   88,574       $   49,030
  Accrued compensation                                                                             6,485            7,177
  Accrued expenses                                                                                18,248            7,529
  Deferred revenue                                                                                24,968           29,708
  Other current liabilities                                                                        8,340            8,866

                                                                                            -----------------------------
Total current liabilities                                                                        146,615          102,310

Long-term liabilities                                                                                850            4,487

Commitments and contingencies

Stockholders' equity:
 Preferred stock, $.01 par value, 5,000,000 shares
   authorized; none issued or outstanding                                                              -                -
 Common stock, $.001 par value; 2,500,000,000 shares
   authorized; 273,340,380 and 271,664,673 shares issued and
   outstanding                                                                                       273              272
 Additional paid-in capital                                                                    1,737,325        1,720,565
 Accumulated deficit                                                                             (34,082)         (21,675)
 Notes receivable                                                                                      -             (262)
 Deferred compensation                                                                           (63,604)        (112,816)
 Accumulated other comprehensive income                                                            5,537            5,034

                                                                                            -----------------------------
Total stockholders' equity                                                                     1,645,449        1,591,118

                                                                                            -----------------------------

Total liabilities and stockholders' equity                                                    $1,792,914       $1,697,915

                                                                                            =============================


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 DATA)



                                                                      Three Months Ended           Six Months Ended
                                                                      ------------------           ----------------
                                                                   January 27,   January 29,   January 27,   January 29,
                                                                      2001          2000          2001          2000
                                                                   -----------------------------------------------------
                                                                                                 
Revenues.........................................................     $149,243      $ 29,049      $269,691      $ 48,559
Cost of revenues (exclusive of the non-cash stock
compensation expense of $488, $339, $2,131 and $601).............       79,111        15,396       143,250        25,736

                                                                      --------------------------------------------------
Gross profit.....................................................       70,132        13,653       126,441        22,823

Operating expenses:
 Research and development (exclusive of the non-cash stock
 compensation expense of $2,902, $1,360, $28,291 and $2,242).....       42,314        12,888        77,993        22,217
 Sales and marketing (exclusive of the non-cash stock
 compensation expense of $2,503, $1,080, $17,238 and $2,686).....       21,870         4,955        39,270         8,408
 General and administrative (exclusive of the non-cash stock
 compensation expense of $567, $586, $1,553 and $1,125)..........        4,557         1,764         8,619         2,720
 Amortization of stock compensation..............................        6,460         3,365        49,213         6,654
 Acquisition costs...............................................            -             -         4,948             -

                                                                      --------------------------------------------------
   Total operating expenses......................................       75,201        22,972       180,043        39,999

Loss from operations.............................................       (5,069)       (9,319)      (53,602)      (17,176)

Interest and other income, net...................................       26,295         4,299        48,624         4,783

                                                                      --------------------------------------------------
Income (loss) before income taxes................................       21,226        (5,020)       (4,978)      (12,393)

Provision for income taxes.......................................        7,429             -         7,429             -

                                                                      --------------------------------------------------
Net income (loss)................................................     $ 13,797      $ (5,020)     $(12,407)     $(12,393)
                                                                      ========      ========      ========      ========

Basic net income (loss) per share................................     $   0.06      $  (0.03)     $  (0.05)     $  (0.10)
Diluted net income (loss) per share..............................     $   0.05      $  (0.03)     $  (0.05)     $  (0.10)

Shares used in per-share calculation - basic.....................      235,299       197,634       232,979       119,886
Shares used in per-share calculation - diluted...................      281,244       197,634       232,979       119,886


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

                                     - 4 -


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



                                                                              Six Months Ended
                                                                              ----------------
                                                                      January 27,           January 29,
                                                                         2001                  2000
                                                                      ---------------------------------
                                                                                      
Cash flows from operating activities:
   Net loss                                                            $ (12,407)            $ (12,393)
   Adjustments to reconcile net loss to net
   cash provided by operating activities:
     Depreciation and amortization                                        13,753                 2,316
     Amortization of stock compensation                                   49,213                 6,654
     Tax benefit from employee stock plans                                11,192                     -
Changes in operating assets and liabilities:
     Accounts receivable                                                 (51,162)                 (570)
     Inventories                                                         (26,214)              (19,197)
     Prepaids and other current assets                                     8,807                 1,166
     Deferred revenue                                                     (4,740)                    -
     Accounts payable                                                     39,544                22,689
     Accrued expenses and other liabilities                                7,641                 4,638

                                                                       -------------------------------
Net cash provided by operating activities                                 35,627                 5,303

                                                                       -------------------------------
Cash flows from investing activities:
     Purchases of property and equipment                                 (77,642)               (9,755)
     Purchases of marketable securities                                 (372,190)             (150,664)
     Maturities of marketable securities                                 344,671                 7,020
     Increase in other assets                                            (43,078)               (2,959)

                                                                       -------------------------------
Net cash used in investing activities                                   (148,239)             (156,358)

                                                                       -------------------------------

Cash flows from financing activities:
     Proceeds from issuance of common stock, net                           5,571               285,727
     Proceeds from notes payable                                             262                   273
     Payments on notes payable                                            (1,780)               (5,151)

                                                                       -------------------------------
Net cash provided by financing activities                                  4,053               280,849

                                                                       -------------------------------

Net (decrease) increase in cash and cash
  equivalents                                                           (108,559)              129,794

Cash and cash equivalents, beginning of period                           429,965                27,332

                                                                       -------------------------------
Cash and cash equivalents, end of period                               $ 321,406             $ 157,126

                                                                       -------------------------------
Supplementary non-cash activity:
     Issuance of common stock in exchange for
       note receivable                                                         -             $     100


   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") develops and markets networking products
that enable service providers to quickly and cost-effectively provide bandwidth
and create new high-speed data services. To date, the Company has principally
marketed its products in the North America and Europe.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

BASIS OF PRESENTATION

All historical financial information has been restated to reflect the
acquisition of Sirocco Systems, Inc. in the first quarter of fiscal 2001, which
was accounted for as a pooling of interests.

The accompanying financial data as of January 27, 2001 and for the three and six
months ended January 27, 2001 and January 29, 2000 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, 2000.

In the opinion of management, all adjustments (which include only normal
recurring adjustments) necessary to present a fair statement of financial
position as of January 27, 2001, results of operations for the three and six
months ended January 27, 2001 and January 29, 2000 and cash flows for the six
months ended January 27, 2001 and January 29, 2000 have been made. The results
of operations for the three and six months ended January 27, 2001 are not
necessarily indicative of the operating results for the full fiscal year or any
future periods.

In September 1999, the FASB issued Emerging Issues Task Force Topic No. D-83
("EITF D-83"), "Accounting for Payroll Taxes Associated with Stock Option
Exercises." EITF D-83 requires that payroll taxes paid on the difference between
the exercise price and the fair value of acquired stock in association with an
employee's exercise of non-qualified stock options to be treated as operating
expenses. Payroll taxes on stock option exercises were $179,000 and $1,971,000
for the three and six months ended January 27, 2001, respectively.

3. NET INCOME (LOSS) PER SHARE AND PRO FORMA NET INCOME (LOSS) PER SHARE

Basic net income (loss) per share is computed by dividing the net income (loss)
for the period by the weighted-average number of common shares outstanding
during the period, less the weighted-average number of shares of common stock
that are subject to repurchase. Diluted net income (loss) per share is computed
by dividing the net income (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.

Pro forma net income (loss) per share is computed using the weighted-average
number of common shares outstanding, including the pro forma effects of the
automatic conversion of the Company's Series A, B, C and D redeemable
convertible preferred stock into shares of the Company's common stock effective
upon the closing of the Company's initial public offering as if such conversion
occurred at the date of original issuance.

All share and per share data presented reflects two three-for-one stock splits
effected in August 1999 and February 2000.

                                      -6-


The following table sets forth the computation of basic and diluted net income
(loss) per share, (in thousands, except per share data):



                                                                   Three Months Ended           Six Months Ended
                                                                   ------------------           ----------------
                                                                 January 27,   January 29,   January 27,   January 29,
                                                                    2001          2000          2001          2000
                                                                  --------      --------      --------      --------
                                                                                             
Numerator:
Net income (loss)............................................     $ 13,797      $ (5,020)     $(12,407)     $(12,393)

Denominator:
Historical:
  Weighted average common shares outstanding.................      272,876       258,110       272,662       181,856
  Weighted average common shares outstanding
   subject to repurchase.....................................      (37,577)      (60,476)      (39,683)      (61,970)
                                                                  --------      --------      --------      --------

Shares used in per share calculation -
  basic......................................................      235,299       197,634       232,979       119,886
                                                                  ========      ========      ========      ========
  Weighted average common shares outstanding.................      272,876       197,634       232,979       119,886
  Weighted average common stock equivalents..................        8,368             -             -             -
                                                                  --------      --------      --------      --------

Shares used in per share calculation - diluted...............      281,244       197,634       232,979       119,886
                                                                  ========      ========      ========      ========

Net income (loss) per share:
  Basic......................................................     $   0.06      $  (0.03)     $  (0.05)     $  (0.10)
                                                                  ========      ========      ========      ========
  Diluted....................................................     $   0.05      $  (0.03)     $  (0.05)     $  (0.10)
                                                                  ========      ========      ========      ========

Denominator:
Pro Forma:
Historical weighted-average shares of common stock
  outstanding-basic .........................................      235,299       197,634       232,979       119,886

Weighted average number of shares assumed issued
  upon conversion of redeemable convertible
  preferred stock............................................            -             -             -        64,690
                                                                  --------      --------      --------      --------

Shares used in per share calculation-pro forma basic.........      235,299       197,634       232,979       184,576
                                                                  ========      ========      ========      ========

Weighted common share stock equivalents......................       45,945             -             -             -
                                                                  --------      --------      --------      --------
Shares used in per share calculation - pro forma diluted.....      281,244       197,634       232,979       184,576
                                                                  ========      ========      ========      ========

Net income (loss) per share:
  Pro forma basic............................................     $   0.06      $  (0.03)     $  (0.05)     $  (0.07)
                                                                  ========      ========      ========      ========
  Pro forma diluted..........................................     $   0.05      $  (0.03)     $  (0.05)     $  (0.07)
                                                                  ========      ========      ========      ========


Options to purchase 18,614,181 shares of common stock at an average exercise
price of $50.71 have not been included in the computation of diluted net income
(loss) per share for the three months ended January 27, 2001 as their effect
would have been anti-dilutive.

4. INVENTORY

Inventory consisted of the following (in thousands):

                               January 27,        July 31,
                                  2001              2000
                         -------------------------------

Raw materials                  $21,666           $14,340
Work in process                 29,712             3,685
Finished goods                  14,575            21,714
                         -------------------------------
                               $65,953           $39,739
                         ===============================

                                      -7-


5. COMMON STOCK

In December 2000, the stockholders of the Company approved an increase in the
number of authorized shares of common stock of the Company from 1,500,000,000 to
2,500,000,000 and approved an amendment to the Company's 1999 Stock Incentive
Plan to increase (a) the number of shares of common stock reserved for issuance
under the plan by 25,000,000, and (b) revise the automatic annual share increase
provision of the plan so that the number of shares of Company common stock
reserved for issuance under the plan will automatically increase on the first
day of each fiscal year of the Company by an amount equal to the lesser of (i)
18,000,000 shares, (ii) five percent (5%) of the number of shares of Company
common stock outstanding on the first day of each fiscal year of the Company, or
(iii) such lesser number of shares as determined by the Company's Board of
Directors.

6. COMPREHENSIVE INCOME (LOSS)

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



                                                    Three Months Ended                       Six Months Ended
                                                    ------------------                       ----------------
                                            January 27, 2001    January 29, 2000    January 27, 2001    January 29, 2000
                                                                                          
Net income (loss)                                    $13,797            $(5,020)           $(12,407)            $(12,393)
Other comprehensive income:
    Unrealized gain (loss) on investments              1,336                  -                 503                  (31)
                                           -----------------------------------------------------------------------------

Comprehensive income (loss)                          $15,133            $(5,020)           $(11,904)            $(12,424)
                                           =============================================================================

The related taxes on the components of comprehensive income (loss) were $467,600
and $176,000 for the three and six months ended January 27, 2001, respectively.

7. ACQUISITION

On September 7, 2000, the Company acquired Sirocco Systems, Inc. ("Sirocco") in
a transaction accounted for as a pooling of interests. An aggregate of
approximately 28.6 million shares of Sycamore common stock were either exchanged
for all outstanding shares of Sirocco or reserved for common stock issuable
under outstanding Sirocco stock options assumed by the Company in the
transaction. Acquisition costs related to this transaction were $4.9 million for
the six months ended January 27, 2001.

8. RECENT ACCOUNTING PRONOUNCEMENTS

In December 1999, the SEC issued Staff Accounting Bulletin No. 101, "Revenue
Recognition in Financial Statements" (SAB 101). SAB 101 summarizes certain areas
of the Staff's views in applying generally accepted accounting principles to
revenue recognition in financial statements. In June 2000, the SEC issued SAB
No. 101B which defers the implementation date of SAB 101 until no later than the
fourth fiscal quarter of fiscal years beginning after December 15, 1999, with
earlier adoption encouraged. The Company is required to and will adopt SAB 101
in the fourth quarter of fiscal 2001. The Company believes that its current
revenue recognition policy complies with SAB 101 and does not expect the
adoption of SAB 101 to have a material impact on its financial position or
results of operations.

In September 2000, the FASB issued Statement of Financial Accounting Standards
No. 140, "Accounting for the Transfers and Servicing of Financial Assets and
Extinguishments of Liabilities" (SFAS No. 140). SFAS No. 140 is effective for
transfers occurring after March 31, 2001 and for disclosures relating to the
securitization transactions and  collateral for fiscal years ending after
December 15, 2000. The Company does not expect the adoption of SFAS No. 140 to
have a material impact on its financial position or results of operations

                                      -8-


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 but not limited to the rate of product purchases by
current and prospective customers; the commercial success of the our line of
intelligent optical networking products; our reliance on a limited number of
customers; new product introductions and enhancements by us and our competitors;
the length and variability of the sales cycles for our products; competition;
manufacturing and sourcing risks; variations in our quarterly results; general
economic conditions including, stock market volatility as well as conditions
specific to the telecommunications, internet and related industries; and the
other factors discussed in our Form 10-K and other reports filed by us from time
to time with the Securities and Exchange Commission. We disclaim any intention
or obligation to update or revise any forward-looking statements, whether as a
result of new information, future results or otherwise. 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 develop and market intelligent optical networking products that transport
voice and data traffic over wavelengths of light. Our products enable service
providers to quickly and cost-effectively provide bandwidth and create new high-
speed voice and data services. Our products and product plans include optical
transport, access and switching systems and end-to-end optical networking
management solutions. We began shipment of our first product in May 1999 and to
date, have principally marketed our products in North America and Europe.

On September 7, 2000, we acquired Sirocco Systems, Inc. ("Sirocco") in a
transaction accounted for as a pooling of interests. An aggregate of
approximately 28.6 million shares of Sycamore common stock were either exchanged
for all outstanding shares of Sirocco or reserved for common stock issuable
under outstanding Sirocco stock options assumed by us in the transaction. All
periods presented have been restated to include Sirocco's results of operations,
financial position and cash flows.

RESULTS OF OPERATIONS

REVENUES

Revenues increased 414% or $120.2 million to $149.2 million for the three months
ended January 27, 2001 compared to $29.0 million for the same period in fiscal
2000. Revenues increased 455% or $221.1 million to $269.7 million for the six
months ended January 27, 2001 compared to $48.6 million for the same period in
fiscal 2000. The increase in revenues represents increased market acceptance of
our products and the broadening of our product offerings, including the SN8000
and SN16000. For the three months ended January 27, 2001, three customers
represented more than ten percent of our revenues on an individual basis,
compared to one customer for the same period in fiscal 2000. For the six months
ended January 27, 2001, two customers represented more than ten percent of our
revenues on an individual basis, compared to one customer for the same period in
fiscal 2000.

COST OF REVENUES

Cost of revenues increased 414% or $63.7 million to $79.1 million for the three
months ended January 27, 2001 compared to $15.4 million for the same period in
fiscal 2000. Cost of revenues increased 457% or $117.5 million to $143.3 million
for the six months ended January 27, 2001 compared to $25.7 million for the same
period in fiscal 2000. Cost of revenues as a percentage of revenue was 53% for
the three and six months ended January 27, 2001 and for the same periods in
fiscal 2000, respectively. The increase in cost of revenues in absolute dollars
is primarily related to increased revenues, as well as headcount increases in
our manufacturing overhead and customer service organizations and increases in
warranty and other period costs. Cost of revenues, and the resulting gross
margins, may be highly variable and dependent on many factors, some of which are
outside our control, such as the demand for our products, new product
introductions, the mix of products sold, competitive pricing and increased
investment in engineering, furnishing, installation and testing (EFI&T)
services. We expect our costs of revenue to increase and gross margins to

                                      -9-


decline during the balance of fiscal 2001 primarily as a result of the foregoing
factors. We also believe that gross margins may be additionally impacted due to
constraints relating to certain component shortages that currently exist in the
supply chain.

RESEARCH AND DEVELOPMENT EXPENSES

Research and development expenses increased $29.4 million to $42.3 million for
the three months ended January 27, 2001 from $12.9 million for the same period
in fiscal 2000. Research and development expenses increased $55.8 million to
$78.0 for the six months ended January 27, 2001 from $22.2 million for the same
period in fiscal 2000. The increase in expenses was primarily due to increased
costs associated with a significant increase in personnel and personnel-related
expenses, increases in non-recurring engineering costs and increases in
prototype expenses for the design and development of new products as well as
enhancements to existing products. Research and development is essential to our
future success and we expect the dollar amounts of research and development
expenses will increase in future periods to support the continued development of
our intelligent optical transport and optical switching products as well as new
or complementary technologies.

SALES AND MARKETING EXPENSES

Sales and marketing expenses increased $16.9 million to $21.9 for the three
months ended January 27, 2001 from $5.0 million for the same period in fiscal
2000. Sales and marketing expenses increased $30.9 million to $39.3 million for
the six months ended January 27, 2001 from $8.4 million for the same period in
fiscal 2000. The increase in expenses reflect the hiring of additional sales and
marketing personnel, sales based commissions, additional office space and
marketing program costs, including web development, trade shows and new product
launch activities. We intend to continue to expand our domestic and
international sales force and marketing efforts and as a result we expect that
the dollar amounts of sales and marketing expenses will increase in future
periods.

GENERAL AND ADMINISTRATIVE EXPENSES

General and administrative expenses increased $2.8 million to $4.6 million for
the three months ended January 27, 2001 from $1.8 million for the same period in
fiscal 2000. General and administrative expenses increased $5.9 million to $8.6
million for the six months ended January 27, 2001 from $2.7 million for the same
period in fiscal 2000. The increase in expenses reflects the hiring of
additional general and administrative personnel and expenses necessary to
support increased levels of business activities. We expect that the dollar
amounts of general and administrative expenses will increase in future periods
as a result of the expansion of business activity and related expenses to
support our operations.

AMORTIZATION OF STOCK COMPENSATION

Amortization of stock compensation expense increased $3.1 million to $6.5
million for the three months ended January 27, 2001 from $3.4 million for the
same period in fiscal 2000. Amortization of stock compensation increased $42.6
million to $49.2 million for the six months ended January 27, 2001 from $6.7
million for the same period in fiscal 2000. 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 as well as the granting of options to non-employees and consultants. The
increase for the six months ended January 27, 2001 is primarily due to the
accelerated vesting of certain restricted stock and stock options in connection
with our merger with Sirocco, which represented approximately $36.3 million of
the increase for the period. Amortization of stock compensation is expected to
impact our reported results of operations through the third quarter of fiscal
2005.

ACQUISITION COSTS

In connection with the acquisition of Sirocco in the first quarter of fiscal
2001, we incurred $4.9 million of acquisition costs for legal, accounting and
professional services.

                                      -10-


NET INTEREST INCOME AND OTHER INCOME

Net interest income and other income increased $22.0 million to $26.3 million
for the three months ended January 27, 2001 from $4.3 million for the same
period in fiscal 2000.  Net interest and other income increased $43.8 million to
$48.6 million for the six months ended January 27, 2001 from $4.8 million for
same period in fiscal 2000.  The increase in interest income and other income
primarily reflects the invested proceeds of our two public offerings within
fiscal 2000.

PROVISION FOR INCOME TAXES

Provision for income taxes currently payable was $7.4 million for the three and
six months ended January 27, 2001.  The provision for income taxes was 35% of
income before income taxes for the three months ended January 27, 2001. Income
taxes currently payable for federal and state purposes have been reduced by the
tax benefits from stock option transactions. The tax benefits totaled
approximately $11.0 million for the six months ended January 27, 2001 and were
credited directly to shareholders' equity. We did not provide for income taxes
for the first quarter of fiscal 2001 and for the first and second quarter of
fiscal 2000 due to net losses for the periods.

LIQUIDITY AND CAPITAL RESOURCES

Prior to our initial public offering in October 1999, we financed our operations
primarily through private sales of our capital stock totaling approximately
$84.7 million and through borrowings on long-term debt agreements for the
purchase of capital equipment.  In fiscal 2000, we completed two public
offerings, for which we sold 30.9 million shares of common stock and generated
net proceeds of $1.5 billion. We primarily invest excess funds in short-term
money market funds, commercial paper, government and non-government debt
securities. As of January 27, 2001, we had $1.4 billion in cash, cash
equivalents and marketable securities.

Net cash provided by operating activities for the six months ended January 27,
2001 was $35.6 million, compared to $5.3 million for the six months ended
January 29, 2000. The increase in net cash provided by operating activities is
primarily due to increased accounts payable, other accrued liabilities, and
operating results after reflecting adjustments for non-cash charges for
amortization of stock compensation and depreciation, partially offset by
increased account receivable and inventory purchases.

Net cash used in investing activities was $148.2 million for the six months
ended January 27, 2001, compared to $156.4 million for the six months ended
January 29, 2000. The decrease in net cash used in investing activities reflects
a decrease in net purchase of available-for-sale marketable securities, offset
by the increased purchases of property and equipment, primarily for computers
and test equipment for our development and manufacturing activities, as well as
the  purchase of land in Tyngsboro, Massachusetts, where our future corporate
headquarters will be established.

Net cash provided by financing activities was $4.1 million for the six months
ended January 27, 2001, compared to $280.8 million for the six months ended
January 29, 2000. The decrease in net cash provided by financing activities
reflects decreased proceeds from the issuance of common stock, offset by
decreased payments on notes payable.

Cash provided by financing activities for the six months ended January 27, 2001
consisted of $5.6 million of proceeds from the sale of our common stock, offset
by $1.8 million of payments on notes payable. Net cash provided by financing
activities for the six months ended January 29, 2000 primarily reflects the net
proceeds and use of proceeds generated from our IPO in October 1999.

Increasingly, as a result of the financial demands of major network deployments,
service providers are looking to their suppliers for financing assistance. From
time to time we may provide or commit to extend credit or credit support to our
customers as we consider appropriate in the course of our business, considering
our resources. Currently, we have customer financing commitments of
approximately $200 million, subject to draw down over two to three years and
completion of definitive lease financing documentation. Depending on market
conditions, we may seek to factor these arrangements to financial institutions
and investors to free up our capital and reduce the amount of our commitments
for such arrangements. 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.

                                      -11-


Although we believe that our current cash will be sufficient to fund our
operations for at least the next 12 months, there can be no assurance that we
will not require additional financing within this time frame or that such
additional funding, if needed, will be available on terms acceptable to us or at
all.

ITEM 3.

RISKS RELATED TO OUR BUSINESS

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

Our future growth depends on the commercial success of our line of intelligent
optical networking products. As of January 27, 2001, our SN 3000 Optical Access
Switch, SN 6000 Intelligent Optical Transport product, SN 8000 Intelligent
Optical Network Node, Silvx Manager Network Management System and SN 16000
Intelligent Optical Switch are the only products that have been shipped to
customers. We cannot assure you that we will be successful in completing the
development or introduction 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.

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

We currently have a limited number of customers, one of whom, Williams
Communications, has accounted for a majority of our revenues to date. Due to the
diversification of our customer base and the substantial performance of our
current contract with Williams Communications, sales to Williams may decline in
absolute dollars and may decline as a percentage of our revenues. In the second
quarter of fiscal 2001, two other customers each accounted for over 10% of our
revenues. None of these customers is contractually committed to purchase any
minimum quantities of products from us. We expect that in the foreseeable future
a majority of our revenues 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. 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.

OUR FAILURE TO GENERATE SUFFICIENT REVENUES WOULD PREVENT US FROM MAINTAINING
PROFITABILITY

We cannot assure you that our revenues will grow or that we will generate
sufficient revenues to maintain profitability. We have large fixed expenses and
we expect to continue to incur significant and increasing sales and marketing,
product development, customer support and service, administrative and other
expenses. Although our revenue has grown in recent quarters, we cannot be
certain that our revenue growth will continue or increase in the future or that
we will realize sufficient revenues to continue to be profitable on a quarterly
basis or to achieve profitability on an annual basis.

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

Our revenues and operating results will 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;

  * the timing of recognizing revenue and deferred revenue;

                                      -12-


  * 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;

  * satisfaction of post delivery obligations, including installation and
    acceptance;

  * 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;

  * employer payroll taxes to be paid on an employee's gain on stock options
    exercised (such payroll taxes are recorded as operating expenses and could
    be material based upon the number of optionees who exercise their options
    and the price of our common stock);

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

We plan to increase our operating expenses to fund greater levels of research
and development, expand our sales and marketing operations, broaden our customer
support capabilities and develop new distribution channels. We also plan to
expand our general and administrative capabilities to address the increased
reporting and other administrative demands which will result from the increasing
size of our business. Our operating expenses are largely based on anticipated
organizational growth and revenue trends and a high percentage of our expenses
are, and will continue to be, fixed. As a result, a delay in generating or
recognizing revenue for the reasons set forth above, or for any other reason,
could cause significant variations in our operating results from quarter to
quarter and could result in substantial operating losses.

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 or growth for one quarter as any indication of
our future performance. In the most recent quarters, the sequential revenue
growth slowed from prior levels, and a disproportionate share of the revenue
occurred in the last month of the quarter due to component constraints.
Occurrences of the foregoing factors are extremely difficult to predict. As a
result, it is likely that in some future our operating results may be below the
expectations of public market analysts and investors or that our net sales may
grow at a slower quarter over quarter percentage rate. In this 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. Because of the nature of the products,
they can only be fully tested when completely deployed in very large networks
with high amounts of traffic. 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:

                                      -13-


  * loss of or delay in revenues 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 REVENUES 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
likely to be lengthy. 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, we
believe that our 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,
the complexity of our customers' network environment and the degree of hardware
and software configuration necessary. 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 revenues
and results of operations to vary significantly and unexpectedly from quarter to
quarter.

OUR LIMITED OPERATING HISTORY MAKES FORECASTING DIFFICULT

We were founded in February 1998. We shipped our first product in May 1999. As a
result, there is limited meaningful historical financial data upon which
investors may evaluate us and our prospects. We also have limited historical
financial data upon which to base our projected revenues. Our operating expenses
are largely based on anticipated revenue trends, and a high percentage of our
expenses are and will continue to be fixed. You should consider the risks and
difficulties frequently encountered by companies like ours in a new and rapidly
evolving market. Our ability to sell products and the level of success, if any,
we achieve depend, among other things, on the level of demand for intelligent
optical networking products, which is a new and rapidly evolving market. If we
do not achieve our expected revenue, our operating results will be below our
expectations and the expectations of our investors and market analysts, which
could cause the price of our common stock to decline.

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

Our future success will depend on our attracting additional customers. The
growth of our customer base could be adversely affected by:

  * customer unwillingness to implement our new optical networking architecture;

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

  * new product introductions by our competitors;

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

                                      -14-


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

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 AND 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. Any such disruption in supply
would seriously impact present and future sales and revenue. Further, the
optical component industry is expanding rapidly and manufacturers of optical
components face unpredictable and growing demand for components. There is in an
industry-wide shortage of some optical components which may result in increased
pricing of such components, extended waiting periods after the placement of
orders for such components and allocations by suppliers limiting the supply of
such components to a given customer in a specific time period. Because optical
components are integrated into our products, this shortage could negatively
impact our sales and operating results.

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

The market for intelligent optical networking products is likely to be
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. In addition, 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 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 ensures 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.

                                      -15-


OUR MARKET IS HIGHLY COMPETITIVE, AND OUR FAILURE TO COMPETE SUCCESSFULLY WOULD
LIMIT OUR ABILITY TO INCREASE OUR MARKET SHARE

Competition in the public network infrastructure market is intense. This market
has historically been dominated by large companies, such as Lucent Technologies,
Nortel Networks, Cisco Systems and Ciena Corporation. In addition, a number of
private companies have announced plans for 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;

     * 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.

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.

WE ARE LIKELY TO FACE DIFFICULTIES IN OBTAINING AND RETAINING CUSTOMERS IF WE DO
NOT EXPAND OUR SALES ORGANIZATION AND OUR CUSTOMER SERVICE AND SUPPORT
OPERATIONS

Our products and services require a sophisticated sales effort targeted at a
limited number of key individuals within our prospective customers'
organizations. This effort requires specialized sales personnel and consulting
engineers. We are  building our direct sales force and plan to hire additional
qualified sales personnel and consulting engineers. Competition for these
individuals is intense, and we might not be able to hire and train the kind and
number of sales personnel and consulting engineers required for us to be
successful. In addition, we believe that our future success is dependent upon
our ability to establish successful relationships with a variety of distribution
partners. If we are unable to expand our direct sales operations or our indirect
sales channel, we may not be able to increase market awareness or sales of our
products, which may prevent us from maintaining profitability.

We are currently expanding our customer service and support organization and
will need to increase our staff and third party subcontractor relationships to
support new customers, including new international opportunities, and a growing
volume of turnkey sales. The installation and support of our products requires
highly trained customer service and support personnel. Hiring customer service
and support personnel is very competitive in our industry because there are a
limited number of people available with the necessary technical skills and
understanding of our market. Once we hire them, they may require extensive
training in our intelligent optical networking products. If we are unable to
expand our customer service and support organization and train our personnel
rapidly or outsource these functions to competent trained subcontractors, our
continued growth may be adversely affected and we may not be able to increase
sales of our products.

                                      -16-


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 a small number
of contract manufacturers to manufacture our products in accordance with our
specifications and to fill orders on a timely basis. We have supply contracts
with Celestica Corporation and Jabil Circuit Inc., which provide comprehensive
manufacturing services, including assembly, test, control and shipment to our
customers, and procure material on our behalf. We may not be able to effectively
manage our relationship with such contract manufacturers, and such contract
manufacturers may not meet our future requirements for timely delivery. Each of
our contract manufacturers also builds 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. We also
purchase products from certain other manufacturers, primarily on a purchase
order basis. 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.

SALES TO EMERGING SERVICE PROVIDERS MAY INCREASE THE UNPREDICTABILITY OF OUR
RESULTS

As a result of current economic and market conditions, decreased funding is
available for large capital expenditures by service providers. This decrease in
available funding significantly affects spending by our customers that are
emerging service providers. In addition, the timing and volume of purchases by
emerging service providers can be unpredictable due to other factors, including
their need to build a customer base and capacity while working within their
budgetary constraints. Our ability to recognize revenue from emerging service
providers will depend on the relative financial strength of the particular
customer. We may be required to write off or decrease the value of our accounts
receivable from a customer whose financial condition materially deteriorates.
Decreases in purchasing volume or emerging service providers or changes in the
financial condition of emerging service provider customers could have a material
adverse effect on our results of operations.

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

The market for intelligent optical networking products is new. 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 COULD RESULT IN SUBSTANTIAL PRODUCT RETURNS,
WHICH COULD SERIOUSLY HARM OUR BUSINESS

Many of our customers will require that our products be specifically designed to
interface with their existing networks, each of which may have different
specifications and utilize multiple protocol standards. Our customers' networks
contain multiple generations of products that have been added over time as these
networks have grown and evolved. Our products must interoperate with all of the
products within these 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 we find errors in
the existing software used in our customers' networks, we will have to modify
our products to fix or overcome these errors so that our products will
interoperate and scale with the existing software and hardware. 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.

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

                                      -17-


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.

OUR FAILURE TO CONTINUALLY IMPROVE OUR INTERNAL CONTROLS AND SYSTEMS, AND HIRE
NEEDED PERSONNEL COULD IMPAIR OUR FUTURE GROWTH

We have expanded our operations rapidly since our inception. We continue to
increase the scope of our operations and have grown our headcount substantially
both domestically and internationally. For example, at January 29, 2000, we had
a total of 344 employees and at January 27, 2001, we had a total of 1,071
employees. Our growth 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 continue to expand, train and manage our work force
worldwide. We may not be able to implement adequate control systems in an
efficient and timely manner. Competition for highly skilled personnel is
intense, especially in the New England area. Any failure to attract, assimilate
or retain qualified personnel to fulfill our current or future needs could
impair our growth.

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

Our future success depends upon 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. The loss of the services of any of our
key employees could delay the development and introduction of, and negatively
impact our ability to sell, our products.

IF WE BECOME SUBJECT TO UNFAIR HIRING 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 in the future as we seek to hire qualified
personnel or that those claims will not result in material litigation. 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 from such claims could divert the attention of our management away
from our operations.

                                      -18-


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, OUR PRODUCTS COULD BECOME OBSOLETE

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.  We may be a party to claims as a result of an allegation that
we infringe others' intellectual property. Such disputes could result in
significant expenses to Sycamore and divert the efforts of our technical and
management personnel.

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:

     * 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.

WE MAY FACE RISKS ASSOCIATED WITH OUR INTERNATIONAL EXPANSION THAT COULD IMPAIR
OUR ABILITY TO GROW OUR REVENUES ABROAD

We intend to continue to expand our sales into international markets. This
expansion will require significant management attention and financial resources
to develop successfully direct and indirect international sales and  services
channels and to support customers in international markets. We may not be able
to develop international market demand for our products.

                                      -19-


We have 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;

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

     * unexpected changes in regulatory requirements;

     * certification requirements;

     * currency fluctuations;

     * reduced protection for intellectual property rights in some countries;

     * potentially adverse tax consequences; and

     * political and economic instability.

ANY ACQUISITIONS 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.
On September 7, 2000, we completed our acquisition of Sirocco. We may also
evaluate other potential transactions and transaction prospects. In the event of
an acquisition, we could:

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

     * incur debt;

     * assume liabilities;

     * incur amortization expenses related to goodwill and other intangible
       assets; or

     * incur large and immediate write-offs.

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

     * problems combining the purchased operations, technologies or products;

     * unanticipated costs;

     * diversion of management's attention from our core business;

     * 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.

                                      -20-


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 may provide or commit to extend credit or credit
support to our customers, including emerging service providers, 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.

RISKS RELATED TO THE SECURITIES MARKET

OUR STOCK MAY BE VOLATILE

An active public market for our common stock may not be sustained. 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 broadband access technology companies;

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

     * fluctuations in stock market prices and volumes.

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. Such litigation, if
instituted, could result in substantial costs and a diversion of management's
attention and resources.

THERE MAY BE SALES OF A SUBSTANTIAL AMOUNT OF OUR COMMON STOCK THAT COULD CAUSE
OUR STOCK PRICE TO FALL

As of January 27, 2001 options to purchase a total of 33,208,256 shares of our
common stock were outstanding. These options are subject to vesting schedules. A
number of the shares underlying these options are freely tradable. In

                                      -21-


addition, certain of our current stockholders hold a substantial number of
shares which are subject to restrictions limiting their ability to sell such
shares. These stockholders may be able to sell such shares in the public market
in the near future. Sales of a substantial number of shares of our common stock
could cause our stock price to fall. 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 January 27, 2001, the executive officers, directors and entities
affiliated with them, in the aggregate, beneficially owned approximately 43.3%
of our outstanding common stock. These stockholders, if acting together, would
be able to influence significantly 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.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK

The following discussion about our market risk disclosures 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 were to increase immediately and uniformly by 10 percent from levels at
January 27, 2001 the fair value of the portfolio would decline by approximately
$4.5 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 is becoming increasingly
global. As a result, we make sales in non-dollar currencies and have exposure to
foreign currency rate fluctuations.  While foreign currency exposure resulting
from sales in non-dollar denominated currencies has been immaterial to date, in
the future, fluctuations in foreign currencies may have an impact on our
financial results. We are prepared to hedge against fluctuations in foreign
currencies if this exposure becomes material.

PART II. OTHER INFORMATION

Item 1. Legal Proceedings

In the ordinary course of business, we become involved in various lawsuits and
claims. While the outcome of these matters is not currently determinable, we
believe that the outcome will not have a material adverse affect on our results
of operations or our financial position.

Item 2. Changes in Securities and Use of Proceeds

On December 14, 2000, the Company's stockholders approved amendments to the
Company's Articles of Organization to increase the authorized number of shares
of the Company's common stock from 1,500,000,000 to 2,500,000,000.

                                      -22-


The Company's stockholders also approved an amendment to the Company's 1999
Stock Incentive Plan to (a) increase the number of shares of common stock
reserved for issuance under the plan by 25,000,000, and (b) revise the automatic
annual share increase provision of the plan so that the number of shares of
Company common stock reserved for issuance under the plan will automatically
increase on the first day of each fiscal year of the Company by an amount equal
to the lesser of (i) 18,000,000 shares, (ii) five percent (5%) of the number of
shares of Company common stock outstanding on the first day of each fiscal year
of the Company, or (iii) such lesser number of shares as determined by the
Company's Board of Directors.

These amendments became effective in December 2000.

Item 3. Defaults Upon Senior Securities

     None.

Item 4. Submission of Matters to a Vote of Security Holders

At the Company's annual meeting held on December 14, 2000, the stockholders of
the Company elected the following nominees, each to serve for a three-year term
as a Class I Director and until his successor is elected and appointed:

      Nominee                          For                  Withheld
      -------                          ---                  --------
      Timothy A. Barrows               222,726,246          396,252

      John W. Gerdelman                222,777,972          344,526

Gururaj Deshpande, Daniel Smith and Paul J. Ferri also continued as directors of
the Company after the annual meeting.

At the same annual meeting, by the affirmative vote of 216,359,133 shares, the
stockholders of the Company approved an increase in the number of authorized
shares of common stock of the Company from 1,500,000,000 to 2,500,000,000. The
number of votes withheld or voted against increasing the number of authorized
shares of common stock of the Company was 6,637,135 and the number of
abstentions was 126,230.

At the same annual meeting, by the affirmative vote of 171,633,866 shares, the
stockholders of the Company approved an amendment to the Company's 1999 Stock
Incentive Plan to increase (a) the number of shares of common stock reserved for
issuance under the plan by 25,000,000, and (b) revise the automatic annual share
increase provision of the plan so that the number of shares of Company common
stock reserved for issuance under the plan will automatically increase on the
first day of each fiscal year of the Company by an amount equal to the lesser of
(i) 18,000,000 shares, (ii) five percent (5%) of the number of shares of Company
common stock outstanding on the first day of each fiscal year of the Company, or
(iii) such lesser number of shares as determined by the Company's Board of
Directors. The number of votes withheld or voted against the amendment to the
Company's 1999 Stock Incentive Plan was 18,908,476, the number of abstentions
was 146,107 and the number of broker non-votes was 32,429,499.

At the same annual meeting, the stockholders of the Company ratified the
appointment by the Board of Directors of the Company of PricewaterhouseCoopers
LLP as the company's independent public accountants for the Company's fiscal
year ending July 31, 2001 by the following vote:

      For                        Against                Abstain
      ---                        -------                -------
      222,710,311                293,903                118,284

Item 5. Other Information

     None.

                                      -23-


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
   **3.2     Certificate of Amendment to the Amended and Restated Certificate of
             Incorporation
     3.3     Certificate of Amendment to the Amended and Restated Certificate of
             Incorporation
   **3.4     Amended and Restated By-Laws
   * 4.1     Specimen common stock certificate
   **4.2     See Exhibits 3.1, 3.2 and 3.3, for provisions of the Certificate of
             Incorporation and By-Laws of the Registrant defining the rights of
             holders of common stock
   10.17     Lease dated as of October 27,2000, between Sycamore Networks, Inc.
             and BCIA New England Holdings LLC for One Executive Drive,
             Chelmsford, Massachusetts



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

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

(b) Reports on Form 8-K:  None.

                                      -24-


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: March 12, 2001

                                      -25-


EXHIBIT INDEX



  Number           Exhibit Description

__________         _____________________________________________________________
                
   **3.1           Amended and Restated Certificate of Incorporation
   **3.2           Certificate of Amendment to the Amended and Restated
                   Certificate of Incorporation
     3.3           Certificate of Amendment to the Amended and Restated
                   Certificate of Incorporation
   **3.4           Amended and Restated By-Laws
   * 4.1           Specimen common stock certificate
   **4.2           See Exhibits 3.1, 3.2 and 3.3, for provisions of the
                   Certificate of Incorporation and By-Laws of the Registrant
                   defining the rights of holders of common stock
   10.17           Lease dated as of October 27,2000, between Sycamore Networks,
                   Inc. and BCIA New England Holdings LLC for One Executive
                   Drive, Chelmsford, Massachusetts




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

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

                                      -26-