EXHIBIT 4.6


THE SECURITIES REPRESENTED BY THIS WARRANT HAVE NOT BEEN REGISTERED UNDER EITHER
THE SECURITIES ACT OF 1933, AS AMENDED (THE "1933 ACT"), OR APPLICABLE STATE
SECURITIES LAWS (THE "STATE ACTS"), AND SHALL NOT BE SOLD, ASSIGNED, PLEDGED,
HYPOTHECATED, DONATED OR OTHERWISE TRANSFERRED (WHETHER OR NOT FOR
CONSIDERATION) BY THE HOLDER EXCEPT BY REGISTRATION OR PURSUANT TO AN EXEMPTION
FROM REGISTRATION UPON THE ISSUANCE TO THE COMPANY OF A FAVORABLE OPINION OF
COUNSEL OR OTHER EVIDENCE REASONABLY SATISFACTORY TO THE COMPANY TO THE EFFECT
THAT ANY SUCH TRANSFER SHALL NOT BE IN VIOLATION OF THE 1933 ACT AND THE STATE
ACTS.



6,431,505 Shares of Common Stock                                  Warrant No. 1


                                     WARRANT
                           To Purchase Common Stock of
            SAVVIS Communications Corporation, a Delaware corporation


         1. GRANT OF WARRANT. THIS IS TO CERTIFY THAT Nortel Networks Inc., a
Delaware corporation, or its registered assigns (the "Holder"), is entitled to
exercise this Warrant to purchase from SAVVIS Communications Corporation, a
Delaware corporation (the "Company"), up to an aggregate of 6,431,505 shares of
common stock, par value $0.01 per share, of the Company (the "Common Stock"),
subject to adjustment determined in accordance with ARTICLE V of the Agreement
(as defined below) all on the terms and conditions and pursuant to the
provisions hereinafter set forth. This Warrant is being granted pursuant to the
terms of that certain Warrant Agreement dated as of March 15, 2002 (the
"Agreement"), by and among the Company and the Holder, and the Company and the
Holder intend to be legally bound hereby and thereby. Any capitalized terms used
herein but not defined herein shall have the meanings ascribed to them in the
Agreement. The Company acknowledges that the Holder's agreement to take certain
actions in connection with the Restructuring (as contemplated by the Agreement)
and the payment of $100.00 is fair and full consideration for the rights granted
to the Holder hereunder, since the Company acknowledges that, due to
restrictions on the exercisability of this Warrant and other restrictions on the
rights of the Holder contained herein and in the Agreement, the value of this
Warrant is contingent, speculative and uncertain.

         2. EXERCISE PRICE. The purchase price payable for each of the shares of
Common Stock sold upon exercise of this Warrant shall be $0.75 (the "Exercise
Price"). Such Exercise Price and the number of shares of Common Stock into which
this Warrant is exercisable are subject to adjustment from time to time as
provided in ARTICLE V of the Agreement.


                                       1
<PAGE>


         3. EXERCISE. This Warrant may be exercised in whole or in part at any
time or from time to time after the date hereof and on or before the fifth
anniversary of the date hereof (the "Expiration Date"), unless otherwise
extended pursuant to the terms of the Agreement.

         In order to exercise this Warrant, in whole or in part, the Holder
hereof shall deliver to the Company at its principal office at 12851 World Gate
Drive, Herndon, Virginia 20170, or at such other office as shall be designated
by the Company pursuant to the Agreement:

                  (a) written notice of the Holder's election to exercise this
Warrant, which notice shall be substantially in the form of the attached
"Subscription Form" and shall specify the number of shares of Common Stock to be
purchased pursuant to such exercise;

                  (b) either (i) a wire transfer of immediately available funds
to the Company or (ii) notice that the Exercise Price is satisfied by reduction
of the number of shares to be received by the Holder upon exercise of this
Warrant as provided in Section 4 below, with the amount of such reduction
specified in such notice; in each case such wire transfer or reduction in the
number of shares shall be in an amount equal to the aggregate purchase price for
all shares of Common Stock to be purchased pursuant to such exercise; and

                  (c) this Warrant, properly endorsed.

Upon receipt thereof, the Company shall, as promptly as practicable, and in any
event within ten (10) days thereafter, execute or cause to be executed and
delivered to the Holder a certificate or certificates representing the aggregate
number of full shares of Common Stock issuable upon such exercise. The stock
certificate or certificates so delivered shall be registered in the name of the
Holder or such other name as shall be designated in said notice.

         This Warrant shall be deemed to have been exercised and such
certificate or certificates shall be deemed to have been issued, and the Holder
or any other person so designated to be named therein shall be deemed to have
become a Holder of record of such shares for all purposes, as of the date of
that said notice, together with said payment and this Warrant, is received by
the Company as aforesaid (the "Exercise Date"). Except as otherwise provided in
the Agreement or this Warrant, the Holder of this Warrant shall not, by virtue
of its ownership of this Warrant, be entitled to any rights of a stockholder in
the Company, either at law or in equity; provided, however, that the Holder
shall, for all purposes, be deemed to have become the Holder of record of such
shares on the Exercise Date. If the exercise is for less than all of the shares
of Common Stock issuable as provided in this Warrant, the Company shall issue a
new Warrant of like tenor and date for the balance of such shares issuable
hereunder to the Holder. The Holder of this Warrant, by its acceptance hereof,
consents to and agrees to be bound by and to comply with all of the provisions
of this Warrant.

         4. "CASHLESS" EXERCISE. At the option of the Holder, the Holder may
exercise this Warrant without a cash payment of the Exercise Price, by
designating that the number of the shares of Common Stock issuable to the Holder
upon such exercise shall be reduced by the number of shares having a Current
Market Value as of the Exercise Date equal to the amount of


                                       2
<PAGE>


the total Exercise Price for such exercise. In such instance, no cash or other
consideration will be paid by the Holder in connection with such exercise other
than the surrender of the Warrant itself, and no commission or other
remuneration will be paid or given by the Holder or the Company in connection
with such exercise. If such exercise results in only a partial exercise of this
Warrant, then the Company shall deliver to the Holder a new Warrant evidencing
the remaining rights under the Warrant, as provided in Section 3 above.

         5. TAXES. The issuance of any Common Stock or other certificate upon
the exercise of this Warrant shall be made without charge to the registered
Holder hereof, or for any tax in respect of the issuance of such certificate,
unless such tax is imposed by law upon the Holder (including, without
limitation, Federal, state or local income taxes), in which case such taxes
shall be paid by the Holder. The obligations of the parties under this Section
shall survive any redemption, repurchase or acquisition of this Warrant or the
Common Stock issued upon exercise of this Warrant by the Company, and any
cancellation or termination of this Warrant.

         6. TRANSFER. Except as otherwise provided under the Agreement, this
Warrant and all options and rights hereunder are transferable, as to all or any
part of the number of shares of Common Stock purchasable upon its exercise, by
the Holder hereof in person or by its duly authorized attorney on the books of
the Company upon surrender of this Warrant at the principal offices of the
Company, together with the "Assignment Form" attached hereto duly executed. The
Company shall deem and treat the registered Holder of this Warrant at any time
as the absolute owner hereof for all purposes and shall not be affected by any
notice to the contrary. If this Warrant is transferred in part, the Company
shall, at the time of surrender of this Warrant, issue to the transferee a
Warrant covering the number of shares of Common Stock transferred and to the
transferor a Warrant covering the number of shares not transferred.

         7. NO FRACTIONAL SHARES. No fractional shares of Common Stock shall be
issued upon the exercise of this Warrant and, in lieu thereof, any fractional
shares shall be rounded down to the nearest whole.

         8. REGISTRATION RIGHTS. The Common Stock into which this Warrant is
exercisable is subject to the Registration Rights Agreement, as such agreement
may be amended from time to time.

         9. RESERVATION OF SHARES. The Company shall, at all times following the
Consent Effectiveness Date and prior to the Expiration Date, reserve and keep
available such number of authorized shares of its Common Stock, solely for the
purpose of effecting the exercise of this Warrant, as may from time to time be
issuable upon exercise of this Warrant.

         10. APPLICABLE LAW. THIS WARRANT SHALL BE GOVERNED BY, CONSTRUED AND
ENFORCED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT GIVING
EFFECT TO THE CONFLICT OF LAWS PROVISIONS THEREOF. EACH OF THE PARTIES HEREBY
SUBMITS TO PERSONAL JURISDICTION AND WAIVES ANY OBJECTION AS TO VENUE IN THE
COUNTY OF NEW YORK, STATE OF NEW YORK. SERVICE OF PROCESS ON THE PARTIES IN ANY
ACTION


                                       3
<PAGE>


ARISING OUT OF OR RELATING TO THIS AGREEMENT SHALL BE EFFECTIVE IF MAILED TO THE
PARTIES IN ACCORDANCE WITH SECTION 7.10 OF THE AGREEMENT. THE PARTIES HERETO
WAIVE ALL RIGHT TO TRIAL BY JURY IN ANY ACTION OR PROCEEDING TO ENFORCE OR
DEFEND ANY RIGHTS HEREUNDER.

         11. SUCCESSORS AND ASSIGNS. This Warrant and the rights evidenced
hereby shall inure to the benefit of, and be binding upon, the successors and
assigns of the Holder hereof and shall be enforceable by any such Holder. In the
event this Warrant is sold, transferred or assigned, the transferor will give
written notice to the Company within fifteen (15) days following such sale,
transfer or assignment and in such notice designate the name and address of the
transferee.


                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]


                                       4
<PAGE>


         IN WITNESS WHEREOF, the Company has caused this Warrant to be duly
executed and issued on its behalf.

         DATED as of March 18, 2002.


                                            SAVVIS COMMUNICATIONS CORPORATION
                                            A DELAWARE CORPORATION





                                          By: /s/ Nancy A. Bridgman Lysinger
                                              ------------------------------
                                              Name: Nancy A. Bridgman Lysinger
                                              Title:  Treasurer & Vice President



                                       5
<PAGE>


                                SUBSCRIPTION FORM

                 (To be executed only upon exercise of Warrant)



         The undersigned registered owner of this Warrant irrevocably exercises
this Warrant for and purchases ________ shares of Common Stock of SAVVIS
Communications Corporation, a Delaware corporation, purchasable with this
Warrant, and herewith makes payment therefor, all at the price and on the terms
and conditions specified in this Warrant and requests that certificates for the
shares of Common Stock hereby purchased (and any securities or other property
issuable upon such exercise) be issued in the name of and delivered to
__________________________________ whose address is ___________________________,
and if such shares of Common Stock shall not include all of the shares of Common
Stock issuable as provided in this Warrant, that a new Warrant of like tenor and
date for the balance of the shares of Common Stock issuable thereunder to be
delivered to the undersigned.

         DATED:  __________________, __________________________________________


                                            By:
                                                   -----------------------------
                                            Name:
                                                   -----------------------------
                                            Title:
                                                   -----------------------------


                                            Address:
                                                     ---------------------------

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

                                                     ---------------------------
<PAGE>


                                 ASSIGNMENT FORM


         FOR VALUE RECEIVED, the undersigned registered owner of this Warrant
hereby sells, assigns and transfers unto the Assignee named below all of the
rights of the undersigned under this Warrant, with respect to the number of
shares of Common Stock set forth below:


                                                        No. of Shares
         Name and Address of Assignee                   Common Stock
         ----------------------------                   ------------








and does hereby irrevocably constitute and appoint as Attorney__________________
to register such transfer on the books of ________________________________
maintained for the purpose, with full power of substitution in the premises.

         DATED:  _________________, _____.  ____________________________________

                                            By:
                                                   -----------------------------
                                            Name:
                                                   -----------------------------
                                            Title:
                                                   -----------------------------


NOTICE:           The signature to this assignment must correspond with the name
                  as written upon the face of the within Warrant in every
                  particular, without alteration or enlargement or any change
                  whatever.


                           ACKNOWLEDGMENT BY ASSIGNEE

         The undersigned Assignee hereby acknowledges receipt of the Warrant
Agreement, and agrees to be bound by its terms.



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

                                            By:
                                                   -----------------------------
                                            Name:
                                                   -----------------------------
                                            Title:
                                                   -----------------------------