SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE TO/A
Tender Offer Statement Under Section 14(d)(1) or 13(e)(1)
of the Securities Exchange Act of 1934

(AMENDMENT NO. 3)

RAMP NETWORKS, INC.
(Name of Subject Company)

BLACKBIRD ACQUISITION, INC.
NOKIA CORPORATION
(Names of Filing Persons (Offerors))

Common Stock, Par Value $0.001 Per Share
(Title of Class of Securities)

751567-10-8
(CUSIP Number of Class of Securities)

Ursula Ranin
Nokia Corporation
Keilalahdentie 4
P.O. Box 226
FIN-00045 Nokia Group
Finland
011-358-9-180-71
(Name, Address and Telephone Number of Persons Authorized to Receive Notices
and Communications on Behalf of filing persons)

Copies to:
Michael J. Coleman, Esq.
Shearman & Sterling
1550 El Camino Real, Suite 100
Menlo Park, California 94025-4100
(415) 330-2200

CALCULATION OF FILING FEE

Transaction Valuation* Amount of Filing Fee**
- --------------------------------------------------------------------------------
$132,278,993.40 $26,455.80
- --------------------------------------------------------------------------------

* Estimated for purposes of calculating the amount of the filing fee only.
Calculated by multiplying $5.80, the per share tender offer price, by
22,806,723, the sum of the 21,760,920 currently outstanding shares of
Common Stock sought in the Offer and the 1,045,803 shares of Common Stock
subject to options that were vested as of January 16, 2001.

** Calculated as 1/50 of 1% of the transaction value.

[X] Check the box if any part of the fee is offset as provided by Rule 0-
11(a)(2) and identify the filing with which the offsetting fee was
previously paid. Identify the previous filing by registration statement
number, or the Form or Schedule and the date of its filing.

Amount Previously Paid: $26,455.80 Filing Party: Blackbird Acquisition, Inc., and
Nokia Corporation

Form or Registration No: Schedule TO Date Filed: December 15, 2000

[_] Check the box if the filing relates solely to preliminary communications
made before the commencement of a tender offer.

Check the appropriate boxes to designate any transactions to which the statement
relates:

[X] third-party tender offer subject to Rule 14d-1.

[_] issuer tender offer subject to Rule 13e-4.

[_] going-private transaction subject to Rule 13e-3.

[_] amendment to Schedule 13D under Rule 13d-2.3

Check the following box if the filing is a final amendment reporting the results
of the tender offer: [_]

This Amendment No. 3 (the "Amendment") amends and supplements the
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Tender Offer Statement on Schedule TO, as amended (the "Schedule TO"), filed
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with the Securities and Exchange Commission (the "Commission") on December 15,
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2000 by Blackbird Acquisition, Inc., a Delaware corporation ("Purchaser"), a
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direct wholly owned subsidiary of Nokia Corporation, a company organized under
the laws of the Republic of Finland ("Parent"). The Schedule TO relates to the
------
offer by Purchaser to purchase all outstanding shares of common stock, par value
$0.001 per share (the "Shares"), of Ramp Networks, Inc., a Delaware corporation
------
(the "Company"), at a purchase price of $5.80 per Share, net to the seller in
-------
cash (subject to applicable withholding taxes), without interest, upon the terms
and subject to the conditions set forth in the Offer to Purchase dated December
15, 2000 (the "Offer to Purchase") and in the related Letter of Transmittal
-----------------
(which, together with the Offer to Purchase and any amendments or supplements
hereto and thereto, collectively constitute the "Offer").
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Capitalized terms used and not otherwise defined herein shall have the meanings
assigned to such terms in the Offer to Purchase or in the Schedule TO.

Item 4. Terms of the Offer.

Item 4 of the Schedule TO is hereby amended and supplemented to include the
following additional information:

Section 1. Terms of the Offer; Expiration Date.

Section 1 of the Offer to Purchase on page 7 is amended by inserting the
following at the end of the first paragraph of such Section 1:

"On January 17, 2001, Parent issued a press release announcing the
extension of the Offer by Purchaser to 5:00 p.m, New York City time, on
Friday, January 19, 2001, unless the Offer is further extended. The Offer
had previously been scheduled to expire at 12:00 midnight, New York City
time, on Tuesday, January 16, 2001. Parent also announced that it had been
advised by the Depositary that as of 12:00 midnight, New York City time, on
Tuesday, January 16, 2001, approximately 19,576,443 Shares had been
tendered into the Offer and not withdrawn (including through notice of
guaranteed delivery), which represents approximately 89.6% of the
outstanding Shares. Under applicable law, the Merger that has been
proposed to occur following successful completion of the Offer may be
effected without a meeting of the stockholders of the Company if Purchaser
acquires ownership of at least 90% of the outstanding Shares of the
Company. The Offer is being extended to permit additional Shares to be
tendered so that, if Shares constituting more than 90% of the outstanding
Shares are tendered into the Offer, the proposed Merger may be effected
without a meeting of the stockholders of the Company. A copy of the press
release issued by Purchaser with respect to the foregoing is filed herewith
as Exhibit (a)(10)."

After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Dated: January 17, 2001

BLACKBIRD ACQUISITION, INC.

/s/ Mika Vehvilainen
---------------------------------------
Name: Mika Vehvilainen
Title: President

After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Dated: January 17, 2001

NOKIA CORPORATION

/s/ Mika Vehvilainen
---------------------------------------
Name: Mika Vehvilainen
Title: Attorney-in-fact

EXHIBIT INDEX

Exhibit
No. Description
- ------- -----------

(a)(1) Offer to Purchase dated December 15, 2000. *
(a)(2) Form of Letter of Transmittal. *
(a)(3) Form of Notice of Guaranteed Delivery. *
(a)(4) Form of Letter to Brokers, Dealers, Commercial Banks, Trust Companies
and Other Nominees. *
(a)(5) Form of Letter from Brokers, Dealers, Commercial Banks, Trust
Companies and Nominees to Clients. *
(a)(6) Form of Guidelines for Certification of Taxpayer Identification Number
on Substitute Form W-9. *
(a)(7) Summary Advertisement as published in The Wall Street Journal on
December 15, 2000. *
(a)(8) Press Release issued by Parent on December 7, 2000 (incorporated by
reference to Exhibit 99.1 on the Schedule on TO-C filed by Purchaser
on December 7, 2000).
(a)(9) Press Release issued by Parent on December 21, 2000. **
(a)(10) Press Release issued by Parent on January 17, 2001.
(d)(1) Agreement and Plan of Merger dated as of December 6, 2000, among
Parent, Purchaser and the Company. *
(d)(3) Stockholders' Agreement dated as of December 6, 2000, among Parent,
Purchaser and each of Mahesh Veerina, Venrock Associates, Venrock
Associates II, L.P., Sridhar Bathina, Interwest Investors V, Interwest
Partners V, L.P., Anthony Sun, Philip Gianos, L. William Krause,
Kothandapani Ranganathan, Perry Grace, Richard Bridges, and Raghu
Bathina.*
(d)(4) Confidentiality Agreement dated October 16, 2000 between Nokia
Internet Communications, Inc. and the Company. *
(g) None.
(h) None.

* Incorporated by reference to the Schedule TO filed by Blackbird Acquisition,
Inc. on December 15, 2000.

** Incorporated by reference to the Schedule TO/A filed by Blackbird
Acquisition, Inc. on December 21, 2000.