Document:

EXHIBIT 4.10

CONFIDENTIAL MATERIALS HAVE BEEN OMITTED FROM THIS EXHIBIT PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT AND HAVE BEEN FILED SEPARATELY WITH THE SECURITIES
AND EXCHANGE COMMISSION. ASTERISKS DENOTE OMISSIONS.

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.

117,315 Shares of Common Stock                                     Warrant No. 6

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

1. GRANT OF WARRANT. THIS IS TO CERTIFY THAT CVC II Partners, L.L.C., a Delaware
limited liability 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
117,315 shares of common stock, par value $0.01 per share, of the Company (the
"Common Stock"), subject to adjustment as set forth in accordance with Section 5
and exercisable in accordance with Section 3, 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 Securities Purchase Agreement
dated as of June 28, 2002, (the "Agreement") by and among the Company and
Constellation Venture Capital II, L.P., Constellation Venture Capital Offshore
II, L.P., The BSC Employee Fund IV, L.P. and CVC II Partners, L.L.C. (the
"Constellation Entities"), and the Company and the Constellation Entities 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.
<PAGE>

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 Section 5.

3. EXERCISE. This Warrant may be exercised in whole or in part at any time prior
to January 28, 2007 (the "Expiration Date") with respect to that number of
shares of Common Stock indicated on Schedule A hereto, subject to adjustment in
accordance with Section 5.

         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.

                                      -2-
<PAGE>

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 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. "Current Market Value" means, on any date, the
average of the daily closing market prices for each day for five trading days
ending one business day before such date as of which such a price can be
established in the manner set forth below. The closing market price for each
such trading day shall be the last sale price on such day as reported in the
Consolidated Last Sale Reporting System or as quoted in the National Association
of Securities Dealers Automated Quotation System, or if such last sale price is
not available, the average of the closing bid and asked prices as reported in
either such system, or in any other case the higher bid price quoted for such
day as reported by The Wall Street Journal and the National Quotation Bureau
pink sheets. If there is no active public market, the value shall be the fair
market value thereof as reasonably determined in good faith by the Board of
Directors of the Company.

5. ADJUSTMENTS. If any of the following events shall occur at any time or from
time to time prior to the exercise of the Warrant, the following adjustments
shall be made in the Exercise Price and/or the number of shares then purchasable
upon the exercise of the Warrant, as appropriate:

         (a) "Stock Splits and Combinations". In case the Company shall at any
time or from time to time after the Closing Date (i) subdivide or split the
outstanding shares of Common Stock, (ii) combine or reclassify the outstanding
shares of Common Stock into a smaller number of shares or (iii) issue by
reclassification of the shares of Common Stock any shares of capital stock of
the Company, then, and in each such case, the Exercise Price in effect
immediately prior to such event or the record date therefor, whichever is
applicable, shall be proportionately increased or reduced, as applicable, and
the aggregate number of shares for which the Warrant shall be exercisable shall
be proportionately increased or reduced, as applicable, so that the Holder of
the Warrant thereafter surrendered for exercise shall be entitled to receive the
number of shares of Common Stock or other securities of the Company which such
Holder would have owned or have been entitled to receive after the occurrence of
any of the events described above, had such Warrant been surrendered for
conversion immediately prior to the occurrence of such event or the record date
therefor, whichever is applicable. An adjustment made pursuant to this
subparagraph (a) shall become effective at the close of business on the day upon
which such corporate action becomes effective. Such adjustment shall be made
successively whenever any event listed above shall occur.

         (b) "Dividends and Distributions in Common Stock". In case the Company
shall at any time or from time to time after the Closing Date pay a dividend or
make a distribution payable in shares of Common Stock on any class of Capital
Stock of the Company other than dividends or distributions of shares of Common

                                      -3-
<PAGE>

Stock or other securities with respect to which adjustments are provided in
paragraph (a) above, the Exercise Price shall be reduced to the price determined
by multiplying (i) the applicable Exercise Price by (ii) a fraction, the
numerator of which shall be the number of shares of Common Stock theretofore
outstanding and the denominator of which shall be the sum of such number of
shares and the total number of shares issuable in such dividend or distribution.
The provisions of this clause shall similarly apply to successive distributions.

         (c) "Distribution of Indebtedness, Securities or Assets". In case the
Company shall at any time or from time to time after the Closing Date distribute
to any holders of Common Stock (whether by dividend or in a merger,
amalgamation, consolidation or otherwise) evidences of indebtedness, shares of
Capital Stock of any class or series, other securities, cash or assets (other
than securities referred to in subparagraph (b) above or (e) below or a dividend
payable exclusively in cash and other than as a result of a Fundamental Change)
in respect of such holder's Common Stock, the Exercise Price in effect
immediately prior to the close of business on the record date fixed for
determination of stockholders entitled to receive such distribution shall be
reduced by multiplying such Exercise Price by a fraction, the numerator of which
is the Volume Weighted Market Value on such record date less the fair market
value (as determined by the Board of Directors of the Company, whose
determination in good faith shall be conclusive) of the portion of such
evidences of indebtedness, shares of Capital Stock, other securities, cash and
assets so distributed applicable to one share of Common Stock and the
denominator of which is the Volume Weighted Market Value. Such adjustment shall
be made successively whenever any such event shall occur. "Capital Stock" means
as to any entity (whether a corporation, partnership or another entity),
corporate stock and any and all shares, partnership interests, limited
partnership interests, limited liability company interests, membership
interests, equity interests, participations, rights or other equivalents
(however designated) of corporate stock or any of the foregoing issued by any
such entity. "Volume Weighted Market Value" means, at any date, the price per
share of Common Stock which equals (i) the sum of the products, for each of the
prior 20 trading days, of the Closing Market Price on such day, multiplied by
the volume of shares traded on such day, (ii) divided by the total volume of
shares traded the prior 20 trading days. If no Closing Market Price for shares
of Common Stock can be determined, the Volume Weighted Market Value shall be the
fair market value thereof as reasonably determined in good faith by the Board of
Directors of the Company. For purposes of this definition, "Closing Market
Price" means, on any trading day, the last sale price for shares of Common Stock
on such day as reported in the Consolidated Last Sale Reporting System or as
quoted in the National Association of Securities Dealers Automated Quotation
System, or if such last sale price is not available, the average of the closing
bid and asked prices as reported in either such system, or in any other case the
higher bid price quoted for such day as reported by The Wall Street Journal and
the National Quotation Bureau pink sheets.

         (d) "Fundamental Changes". In case of any Fundamental Change, this
Warrant shall be exercisable for the kind and amount of stock, other securities,
cash and assets that it would have been exercisable for prior thereto (or
anything that such stock, other securities or assets are later converted or
changed into); provided, however, that in the event such Fundamental Change
shall result in a successor entity to the Company, at the option of such
successor entity, such Warrant shall immediately become exercisable at the time

                                      -4-
<PAGE>

of such Fundamental Change for the aggregate number of shares of Common Stock
represented by this Warrant notwithstanding the provisions of Schedule A. In the
event a successor entity does not elect to fully vest the Warrant as provided in
the proviso of the immediately preceding sentence, such successor entity shall
assume in writing all of the obligations of the Company under this Warrant (in
form and substance reasonably satisfactory to the Holder). In any such case,
appropriate adjustment shall be made in the application of the provisions of
this Section 5 with respect to the rights of the Holder of the Warrant after the
Fundamental Change to the end that the provisions of this Section 5 shall be
applicable after that event in a manner as nearly equivalent as practicable as
before the Fundamental Change. "Fundamental Change" means any transaction or
event, including, without limitation, any merger, consolidation, sale of assets,
reclassification, recapitalization, compulsory share exchange or liquidation, in
which all or substantially all outstanding shares of the Company's common stock
are converted into or exchanged for stock, other securities or assets.

         (e) "Adjustment of Exercise Price Upon Issuance of Additional Shares of
Common Stock".

                  (i) In the event the Company shall issue Additional Shares of
Common Stock (including Additional Shares of Common Stock deemed to be issued
pursuant to Section 5(e)(ii)), without consideration or for a consideration per
share less than the Exercise Price in effect on the date of and immediately
prior to such issue, then, and in each such event, the Exercise Price will be
recalculated in accordance with the following formula: the Exercise Price then
in effect shall be multiplied by a fraction, (x) the numerator of which shall be
the number of shares of Common Stock outstanding immediately prior to such
issuance ("Outstanding Common Stock") plus the number of shares of Common Stock
that the aggregate consideration (determined in the manner provided in Section
5(e)(iii)) received by the Company for such issuance would purchase at the
Exercise Price in effect immediately prior to such issuance; and (y) the
denominator of which shall be the number of shares of Outstanding Common Stock
plus the number of Additional Shares of Common Stock. For purposes of the
foregoing calculation, the term "Outstanding Common Stock" shall include,
without limitation, shares of Common Stock issued or issuable upon the exercise,
exchange or conversion of outstanding securities, excluding Common Stock
issuable upon the exercise, exchange or conversion of options, warrants or
similar rights to acquire Common Stock, at a price greater than the Volume
Weighted Market Value as of the date of adjustment. "Additional Shares of Common
Stock" means any shares of Common Stock issued (or deemed to have been issued
pursuant to Section 5(e)(ii)) by the Company other than: (a) Common Stock issued
pursuant to a transaction described in Section 5(a) or 5(b), (b) shares of
Common Stock issued or issuable upon conversion of the Company's Series A
Convertible Preferred Stock, (c) in addition to the shares of Common Stock
described in (d) below, shares of Common Stock or options, warrants or similar
rights to purchase shares of Common Stock, which shares are issuable or issued
to employees, consultants or directors of the Company directly or pursuant to a
stock option, restricted stock, employee stock purchase or similar plan approved
by the Board of Directors of the Company, and (d) shares of Common Stock issued
or issuable upon conversion of all securities convertible, exchangeable or
exercisable for, or rights to purchase, shares of Common Stock validly issued
and outstanding as of the Closing Date.

                                      -5-
<PAGE>

                  (ii) In the case of the issuance of options to purchase or
rights to subscribe for Common Stock, securities by their terms or by agreement
with the Company convertible into or exchangeable for Common Stock or options to
purchase or rights to subscribe for such convertible or exchangeable securities,
the following provisions shall be taken into account in making the adjustment:

                           (A) The shares of Common Stock deliverable upon
exercise of such options to purchase or rights to subscribe for Common Stock
shall be deemed to have been issued at the time such options or rights were
issued and for a consideration equal to the consideration (determined in the
manner provided in Section 5(e)(iii)), if any, received by the Company upon the
issuance of such options or rights plus the minimum exercise price provided in
such options or rights (without taking into account potential antidilution
adjustments) for the Common Stock covered thereby.

                           (B) The aggregate maximum number of shares of Common
Stock deliverable upon conversion of or in exchange (assuming the satisfaction
of any condition to convertibility or exchangeability, including without
limitation, the passage of time, but without taking into account potential
antidilution adjustments, accrual of dividends or payment of any premiums or
preferences conditioned upon the occurrence of specified transactions) for any
such convertible or exchangeable securities or upon the exercise of options to
purchase or rights to subscribe for such convertible or exchangeable securities
and subsequent conversion or exchange thereof shall be deemed to have been
issued at the time such securities were issued or such options or rights were
issued and for a consideration equal to the consideration, if any, received by
the Company for any such securities and related options or rights (excluding any
cash received on account of accrued interest or accrued dividends), plus the
minimum additional consideration, if any, to be received by the Company (without
taking into account potential antidilution adjustments) upon the conversion or
exchange of such securities or the exercise of any related options or rights
(the consideration in each case to be determined in the manner provided in
Section 5(e)(iii)).

                  (iii) In the case of the issuance of Common Stock for cash,
the consideration shall be deemed to be the amount of cash paid therefor before
deducting any reasonable discounts, commissions or other expenses allowed, paid
or incurred by the Company for any underwriting or otherwise in connection with
the issuance and sale thereof. In the case of the issuance of the Common Stock
for a consideration in whole or in part other than cash, the consideration other
than cash shall be deemed to be the fair value thereof as determined in good
faith by the Board of Directors of the Company irrespective of any accounting
treatment.

                  (iv) Notwithstanding any other provisions of this Section
5(e), no adjustment of the Exercise Price pursuant to this Section 5(e) shall
have the effect of increasing the Exercise Price above the Exercise Price in
effect immediately prior to such adjustment.

         (f) "Number of Shares Upon Adjustment of Exercise Price". Upon each
adjustment of the Exercise Price, the Holder of a Warrant shall thereafter be
entitled to purchase, at the Exercise Price resulting from such adjustment, the
number of shares obtained by multiplying the Exercise Price in effect
immediately prior to such adjustment by the number of shares purchasable

                                      -6-
<PAGE>

pursuant to such Warrant immediately prior to such adjustment and dividing the
product thereof by the Exercise Price resulting from such adjustment.

6. 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.

7. 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.

8. 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.

9. REGISTRATION RIGHTS. The Common Stock into which this Warrant is exercisable
is subject to that certain Investor Rights Agreement by and among the Company
and certain other parties dated as of March 6, 2002, as such agreement may be
amended from time to time.

10. RESERVATION OF SHARES. The Company shall, at all times after the Consent
Effectiveness Date (as defined in the Agreement) 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. If, at any time, the
number of authorized but unissued shares of Common Stock shall not be sufficient
to effect the exercise of the Warrant or otherwise to comply with the terms of
the Agreement, the Company shall forthwith use commercially reasonable efforts
to take such corporate action as may be necessary to increase its authorized but
unissued shares of Common Stock to such number of shares as shall be sufficient
for such purposes. The Company shall use commercially reasonable efforts to
obtain any authorization, consent, approval or other action by or make any
filing with any court or administrative body that may be required under
applicable state securities laws in connection with the issuance of shares of
Common Stock upon exercise of the Warrant.

11. 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

                                      -7-
<PAGE>

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 ARISING
OUT OF OR RELATING TO THIS AGREEMENT SHALL BE EFFECTIVE IF MAILED TO THE PARTIES
IN ACCORDANCE WITH SECTION 8.04 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.

12. 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.

13. EXCHANGE OF CERTIFICATES FOR WARRANTS. This Warrant may be exchanged, at the
option of the Holder, and upon surrender of such Warrant to the Company, for
another Warrant, or other Warrants of different denominations, of like tenor and
representing in the aggregate the right to purchase a like number of shares of
Common Stock. The Holder shall make such request in a writing delivered to the
Company, and must surrender the Warrant to be so exchanged. Thereupon, the
Company will execute and deliver to the Holder the new Warrants so requested.
The Warrant surrendered for exchange will be cancelled by the Company.

14. REPLACEMENT OF INSTRUMENTS. Upon receipt by the Company of evidence
reasonably satisfactory to it of the ownership of and the loss, theft,
destruction or mutilation of any certificate or instrument evidencing this
Warrant, and (a) in the case of loss, theft or destruction, of indemnity
reasonably satisfactory to it (provided that if the Holder is an institutional
lender or investor, its own agreement of indemnity shall be deemed to be
satisfactory), or (b) in the case of mutilation, upon surrender or cancellation
thereof, the Company, at its expense, shall execute, register and deliver, in
lieu thereof, a new certificate or instrument for (or covering the purchase of)
an equal number of shares of Common Stock.

15. INFORMATION RIGHTS; INSPECTION RIGHTS. Within ten (10) days of the end of
every calendar month, the Company shall provide the Holder with a written report
detailing the progress of the Constellation Entities towards achieving the
revenue targets set forth on Schedule A. The Holder shall have the right, at any
time, upon reasonable notice and during normal business hours, to audit the
books and records of the Company to confirm the information set forth in the
Company's monthly reports.

16. NOTICES OF CERTAIN EVENTS.

         (a) In the event of (i) any setting by the Company of a record date
with respect to the holders of any class of securities of the Company for the
purpose of determining which of such holders are entitled to dividends or other
distributions, or any right to subscribe for, purchase or otherwise acquire any
shares of Common Stock or any other securities or property, or to receive any
other right; (ii) any capital reorganization of the Company, or reclassification

                                      -8-
<PAGE>

or recapitalization of the Common Stock of the Company or any transfer of all or
substantially all of the assets of the Company to, or consolidation or merger of
the Company with or into, any other entity or Person; or (iii) any involuntary
dissolution, liquidation or winding-up of the Company; then, and in each such
event, the Company will mail or cause to be mailed to the Holder of the Warrant
at the time (as reflected in the records of the Company), a notice specifying,
as the case may be: (A) the date on which any such record is to be set for the
purpose of such dividend, distribution or right, and stating the amount and
character of such dividend, distribution or right; or (B) the date on which any
such reorganization, reclassification, recapitalization, transfer,
consolidation, merger, dissolution, liquidation or winding-up is to take place
and the time, if any is to be fixed, as of which the holders of record of Common
Stock (or such other Capital Stock or securities receivable upon the exercise of
the Warrant) shall be entitled to exchange their shares of Common Stock (or such
other Capital Stock or securities) for securities or other property deliverable
upon such event. Any such notice shall be given, as provided in Section 8.04 of
the Agreement, at least fifteen (15) days prior to the date therein specified
and the Holder of the Warrant may exercise its Warrant at any time within the
fifteen (15) day period from the date of mailing of such notice.

         (b) If there shall be any adjustment as provided in Section 5, or if
the securities or property other than shares of Common Stock of the Company
shall become purchasable in lieu of shares of such Common Stock upon exercise of
the Warrant, the Company shall forthwith cause written notice thereof to be
sent, as provided in Section 8.04 of the Agreement, to the Holder of the Warrant
at the address of such Person shown on the books of the Company, which notice
shall be accompanied by a certificate of the chief financial officer of the
Company setting forth in reasonable detail the basis for the Holder becoming
entitled to purchase such shares and the number of shares that may be purchased
and the Exercise Price thereof, or the facts requiring any such adjustment and
the Exercise Price and the number of shares purchasable after such adjustment,
or the kind and amount of any such securities or property so purchasable upon
the exercise of the Warrant, or the number of shares issued to the Holder as
ownership protection, as the case may be. At the request of the Holder and upon
surrender of the Warrant, the Company shall reissue the Warrant in a form
conforming to such adjustments.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

                                      -9-
<PAGE>

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

DATED as of June 28, 2002.

                                               SAVVIS COMMUNICATIONS CORPORATION
                                               A DELAWARE CORPORATION

                                               By: /s/ Lane H. Blumenfeld
                                                   Name: Lane H. Blumenfeld
                                                   Title: Vice President and
                                                          Acting General Counsel

                                      -10-
<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:
                                                   -----------------------------

<PAGE>

                                   SCHEDULE A

At all times on and after the first date that the Company and its Subsidiaries
have, in the aggregate, [**] determined in accordance with GAAP of at least (i)
[**] the number of shares of Common Stock issuable upon exercise of this Warrant
shall equal [**] (subject to adjustment in accordance with Section 5), (ii) [**]
the number of shares of Common Stock issuable upon exercise of this Warrant
shall be increased by [**] (subject to adjustment in accordance with Section 5)
and (iii) [**] the number of shares of Common Stock issuable upon exercise of
this Warrant shall be increased by [**] (subject to adjustment in accordance
with Section 5), in each case from any combination of the following: (a) [**] in
which any of the [**] directly or indirectly, [**] to the Company or its
Subsidiaries or otherwise [**] (b) [**] and (c) [**] (collectively, (a) through
(c) are the "Covered Transactions"); provided, however, that (x) there shall be
excluded from such [**] and (y) for the avoidance of doubt, there shall be
included in such [**] with respect to any entity which is a part of the same
organization as an entity whose [**] would be included in a Covered Transaction,
such as a subsidiary, parent company, division or business unit of any such
entity. "Affiliate" means, as to any Person, any other Person (a) that directly
or indirectly, through one or more intermediaries, controls or is controlled by,
or is under common control with such Person. For purposes of this definition,
the term "control" means the possession, directly or indirectly, of the power to
direct or cause the direction of the management and policies of a Person,
whether through the ownership of voting securities, by contract or otherwise. In
the event the Company and the Constellation Entities are unable to reach
agreement within twenty (20) days of a transaction as to whether such
transaction is a Covered Transaction, this determination shall be made in
arbitration pursuant to the then-current Commercial Rules and supervision of the
American Arbitration Association (the "AAA"). The arbitration shall be held in
New York, New York. The Company , on the one hand, and the Constellation
Entities, on the other hand, shall appoint one arbitrator within twenty (20)
days of receipt by the respondent of the notice of arbitration. The two
arbitrators appointed by such parties shall, within twenty (20) days after their
appointment, appoint a third, presiding arbitrator. If either such party fails
to nominate an arbitrator, or the two arbitrators appointed by such parties are
unable to appoint a presiding arbitrator within the stated periods, the second
or presiding arbitrator, as the case may be, shall be appointed by the AAA. All
arbitrators shall be fluent in English and all hearings shall be conducted in
the English language. The arbitrators shall, by majority vote, render a written
decision stating reasons therefor. The arbitrators' decision and award shall be
final and binding and may be entered in any court having jurisdiction thereof.
The costs and expenses of the arbitration shall be paid by the losing party. The
parties hereto will use their reasonable best efforts to cause the arbitrators
hereunder to render a final and binding decision within ninety (90) days
following the commencement of any such proceeding.

[**]  CONFIDENTIAL TREATMENT REQUESTEDEXHIBIT 10.1

                  THIS SECURITIES PURCHASE AGREEMENT (this "AGREEMENT"), dated
as of June 28, 2002, is between SAVVIS COMMUNICATIONS CORPORATION, a Delaware
corporation (the "COMPANY") and Constellation Venture Capital II, L.P., a
Delaware limited partnership, Constellation Venture Capital Offshore II, L.P., a
Cayman Islands limited partnership, The BSC Employee Fund IV, L.P., a Delaware
limited partnership, and CVC II Partners, L.L.C., a Delaware limited liability
company (the "PURCHASERS").

                  WHEREAS, the Company desires to issue and sell to each
Purchaser, and each Purchaser desires to purchase from the Company, shares of
the Company's Series A Convertible Preferred Stock, par value $.01 per share
(the "SERIES A PREFERRED STOCK") on the terms and subject to the conditions set
forth herein;

                  WHEREAS, on March 18, 2002, the Company filed a certificate of
designation of the powers, preferences and relative, participating, optional and
other special rights and qualifications, limitations and restrictions thereof
relating to the Series A Preferred Stock (the "CERTIFICATE OF DESIGNATION");

                  WHEREAS, the Series A Preferred Stock is convertible into
shares (the "CONVERSION SHARES") of the Company's Common Stock, $.01 par value
("COMMON STOCK"); and

                  WHEREAS, as a further inducement to the Purchasers' purchase
of shares of Series A Preferred Stock, the Company will issue to the Purchasers
warrants to purchase 10,000,000 shares of Common Stock (the "WARRANT SHARES"),
in the form attached hereto as Exhibit A (collectively, the "WARRANTS");

                  NOW, THEREFORE, in consideration of the premises and the
mutual covenants herein contained, the parties hereto agree as follows:

                       I. PURCHASE AND SALE OF SECURITIES

                  SECTION 1.01 Authorization; Agreements to Sell and to
Purchase. (a) On the Closing Date (as defined in Section 1.02) and on the terms
and subject to the satisfaction of the applicable conditions set forth in this
Agreement, the Company shall issue and sell to each Purchaser, and each
Purchaser, severally and not jointly, shall purchase from the Company, that
number of shares of Series A Preferred Stock set forth opposite the name of each
such Purchaser in Annex I (the "PREFERRED SHARES") and a Warrant for a purchase
price per share equal to $1,000 (the "PURCHASE PRICE") payable as provided in
Section 1.01(b).

                  (b) Payment. On the Closing Date and on the terms and subject
to the satisfaction of the applicable conditions set forth in this Agreement, as
payment in full for the Preferred Shares being purchased by each Purchaser on
such date and against delivery by the Company of the certificate or certificates
representing such Purchaser's Preferred Shares and Warrants being purchased on
such date, each of the Purchasers set forth in Annex I shall pay the amount set
forth opposite the name of such Purchaser in Annex I by wire transfer of
immediately available funds to an account designated by the Company on the day
immediately prior to the Closing Date.
<PAGE>

                  (c)  Provisions of General Application. At the Closing
(as defined in Section 1.02), (i) the Company shall issue and deliver to each
Purchaser, against payment of the Purchase Price therefore, certificates
evidencing the Preferred Shares being purchased by such Purchaser, registered in
the name of such Purchaser, free and clear of all liens, charges or other
encumbrances of any kind, and (ii) the Company shall issue and deliver to the
Purchasers the Warrants registered in the name of the Purchasers, free and clear
of all liens, charges or encumbrances of any kind.

                  SECTION 1.02 Closing. The issuance and purchase contemplated
by Section 1.01 (the "CLOSING") shall take place on a date (the "CLOSING DATE")
to be specified by the Company and the Purchasers, which date shall be no later
than the second business day after the date as of which all the conditions set
forth in Sections 6.01 and 6.02 have been satisfied (or, to the extent
permitted, waived by the parties entitled to the benefit thereof). The Closing
shall take place at the offices of Hogan & Hartson L.L.P., 885 Third Avenue, New
York, New York 10022, or at such other place as may be mutually agreed upon by
the Purchasers and the Company.

                II. REPRESENTATIONS AND WARRANTIES OF THE COMPANY

                  The Company represents and warrants to the Purchasers on the
date hereof and on the Closing Date as follows:

                  SECTION 2.01 Organization and Qualification. The Company is a
corporation duly organized, validly existing and in good standing under the laws
of the State of Delaware and has all requisite corporate power and authority to
own or lease and operate its properties and assets and to carry on its business
as it is now being conducted and as presently proposed to be conducted. The
Company is duly qualified as a foreign corporation to do business, and is in
good standing, in each jurisdiction in which the character of its properties
owned or leased or the nature of its activities makes such qualification
necessary, except where the failure to be so qualified would not have a material
adverse effect on the properties, assets, financial condition, operating
results, business or prospects of the Company and its Subsidiaries (as defined
in Section 2.02), taken as a whole (a "MATERIAL ADVERSE EFFECT").

                  SECTION 2.02 Subsidiaries. Except for the Subsidiaries
disclosed in the Company SEC Filings (as defined in Section 2.08), the Company
does not own, beneficially or of record, any capital stock or other ownership
interest in any other Person. SAVVIS Communications Corporation, a Missouri
corporation ("SAVVIS MISSOURI") is a corporation duly organized, validly
existing and in good standing under the laws of Missouri. Global Network Assets,
LLC, a Delaware limited liability company ("GLOBAL LLC"), is a limited liability
company, duly formed, validly existing and in good standing under the laws of
Delaware. Savvis Procurement Corporation, a Delaware corporation ("SAVVIS
PROCUREMENT"), is a corporation duly organized, validly existing and in good
standing under the laws of Delaware. Each of SAVVIS Missouri, Global LLC and
Savvis Procurement has all requisite power and authority to own or lease and
operate its properties and assets and to carry out its business as it is now
being conducted. Each of SAVVIS Missouri, Global LLC and Savvis Procurement is

                                       2
<PAGE>

duly qualified as a foreign corporation to do business, and is in good standing,
in each jurisdiction in which the character of its properties owned or leased or
the nature of its activities makes such qualification necessary, except where
the failure to be so qualified would not have a Material Adverse Effect. As used
in this Agreement, (i) "PERSON" means any corporation, partnership, limited
liability company, trust, joint venture or other entity and (ii) "SUBSIDIARY"
means, with respect to any Person, any corporation, association or other
business entity of which more than 50% of the total voting power of shares of
capital stock entitled (without regard to the occurrence of any contingency) to
vote in the election of directors, managers or trustees thereof is at the time
owned or controlled, directly or indirectly, by such Person or one or more of
the other Subsidiaries of such Person or a combination thereof. SAVVIS Missouri,
Global LLC and Savvis Procurement are the Company's only Significant
Subsidiaries (as defined in Rule 1-02(w) of Regulation S-X).

                  SECTION 2.03 Capitalization. (a) As of the date hereof, the
authorized capital stock of the Company consists of 250,000,000 shares of Common
Stock and 50,000,000 shares of Preferred Stock, $.01 par value ("PREFERRED
STOCK"), of which 210,000 have been designated Series A Preferred Stock. As of
the date hereof, prior to the issuance of the Preferred Shares, 94,026,666
shares of Common Stock and 158,070 shares of Preferred Stock are issued and
outstanding. All outstanding shares of Common Stock and Preferred Stock have
been duly authorized and validly issued and are fully paid and non-assessable
and have been issued in compliance with all applicable federal and state
securities laws.

                  (b) As of the date hereof, except for options granted pursuant
to the Company's stock option plan (the "STOCK OPTION PLAN") to purchase an
aggregate 34,426,563 shares of Common Stock, and except as set forth on Schedule
2.03(b) of the Disclosure Letter of the Company, dated the date hereof (the
"DISCLOSURE LETTER"), no subscription, warrant, option, convertible or
exchangeable instrument, stock appreciation or other right (contingent or other)
to purchase or acquire any shares of any class of capital stock or other equity
interest of the Company or any of its Subsidiaries is authorized or outstanding,
and (except as otherwise expressly contemplated by this Agreement) there is not
any agreement, arrangement, understanding or commitment of the Company or any of
its Subsidiaries to issue any subscription, warrant, option, convertible or
exchangeable instrument, stock appreciation or other right (contingent or other)
to purchase or acquire any shares of any class of capital stock or other equity
interest of the Company or any of its Subsidiaries or any security of any kind
convertible into or exercisable or exchangeable for any shares of capital stock
or other equity interest of the Company or any Subsidiary or to distribute to
holders of any class of its capital stock, any evidences of indebtedness or
assets. Except as set forth on Schedule 2.03, there are no preemptive rights,
rights of first refusal or other agreements, arrangements, understandings or
rights with respect to the issue or sale of the Company's or any Subsidiary's
capital stock or securities convertible into, exercisable or exchangeable for
capital stock of the Company or any Subsidiary. Except as set forth on Schedule
2.03 and except for the side letter between the Company, certain WCAS Investors
(as defined therein) and the Purchasers, dated the date hereof (the "SIDE
LETTER") and the Investor Rights Agreement dated as of March 6, 2002 as amended
by Amendment No. 1 dated as of June 28, 2002 (as so amended and together with
the Side Letter, the "INVESTOR RIGHTS AGREEMENT"), the Company is not a party to
or subject to any agreement or understanding, and, to the best knowledge of the
Company, there is no agreement or understanding between or among any Persons
that affects or relates to the voting, or giving of written consents or
nominating directors, with respect to the Company, SAVVIS Missouri, Global LLC
or Savvis Procurement.

                                       3
<PAGE>

                  (c) Upon the Closing, the authorized, issued and outstanding
capital stock of the Company will be as set forth on Schedule 2.03(c) to the
Disclosure Letter.

                  SECTION 2.04 Authorization of Agreements, etc. (a) The Company
has the corporate power and authority to execute, deliver and perform its
obligations under this Agreement, the Warrants and the Investor Rights
Agreement, to consummate the transactions contemplated hereby and thereby, and
to conduct its business as now conducted and as proposed to be conducted. Except
as set forth on Schedule 2.04(a) of the Disclosure Letter, each of (i) the
execution and delivery by the Company of this Agreement, the Warrants and the
Investor Rights Agreement and the performance by the Company of its obligations
hereunder and thereunder, (ii) the issuance, sale and delivery by the Company of
all of the Preferred Shares to be issued and sold to the Purchasers hereunder
and (iii) the issuance and delivery by the Company of the Warrants to the
Purchasers will be duly and validly authorized prior to the Closing by all
requisite corporate and stockholder action and will not violate any provision of
applicable law, any order of any Governmental Authority (as defined in Section
2.06), the Certificate of Incorporation or Bylaws of the Company, or any
provision of any indenture, agreement or other instrument to which the Company
or any of its Subsidiaries or their properties or assets is bound, or conflict
with, result in a breach of or constitute (with or without due notice or lapse
of time or both) a default, or result in the vesting, acceleration or material
modification of any benefits under any such indenture, agreement or other
instrument or any compensation agreement or benefit plan, or result in the
creation or imposition of any liens, claims, charges, restrictions, rights of
others, security interests, prior assignments or other encumbrances in favor of
any third Person upon any of the assets of the Company or any of its
Subsidiaries. None of the Company, SAVVIS Missouri, Global LLC nor Savvis
Procurement is in violation of or default of any provision of its articles or
certificate of incorporation or by-laws (or other comparable charter documents).

                  (b) Except as set forth on Schedule 2.04(b) of the Disclosure
Letter, the issuance, sale and delivery of the Preferred Shares and the
Conversion Shares to the Purchasers and the issuance and delivery of the
Warrants and the Warrant Shares to the Purchasers are not and will not be
subject to any preemptive rights of stockholders of the Company or to any right
of first refusal or other similar right in favor of any Person.

                  (c) The Preferred Shares, when issued in accordance with the
terms of this Agreement, will be duly authorized and validly issued, fully paid
and nonassessable, issued in compliance with all applicable federal and
securities laws and will have the powers, preferences, rights and qualifications
set forth in the Certificate of Designation. On the Consent Effectiveness Date
(as defined in Section 2.17 below), (i) each of the Conversion Shares into which
the Preferred Shares are convertible in accordance with the Certificate of
Designation shall have been duly authorized by the Company and duly reserved in
contemplation of the conversion of such Preferred Shares and, when issued in
accordance with the provisions of the Certificate of Designation, will be
validly issued, fully paid and nonassessable shares of capital stock of the
Company, issued in compliance with all applicable federal and securities laws
and (ii) each Warrant Share into which the Warrants are exercisable shall have

                                       4
<PAGE>

been duly authorized by the Company and duly reserved in contemplation of the
exercise of such Warrants and, when issued and paid for in accordance with the
provisions of the Warrants, will be validly issued, fully paid and
non-assessable shares of capital stock of the Company, issued in compliance with
all applicable federal and securities laws.

                  SECTION 2.05 Validity. This Agreement has been duly executed
and delivered by the Company and constitutes the legal, valid and binding
obligation of the Company, enforceable against the Company in accordance with
its terms. The Warrants, when duly executed and delivered by the Company in
accordance with this Agreement, will constitute legal, valid and binding
obligation of the Company, enforceable against the Company in accordance with
their terms. The Investor Rights Agreement has been duly executed and delivered
by the Company and constitutes the legal, valid and binding obligation of the
Company, enforceable against the Company in accordance with its terms.

                  SECTION 2.06 Governmental Approvals; Consents. Subject to the
accuracy of the representations and warranties of the Purchasers set forth in
Article III and except for (i) the effectiveness of the Written Consent of
Stockholders, dated March 6, 2002, and the Written Consent of Stockholders,
dated March 18, 2002 (the "WRITTEN CONSENT"), referred to in the Information
Statement filed by the Company with the SEC on June 18, 2002 (the "INFORMATION
STATEMENT"), (ii) the application for listing the Warrant Shares on the Nasdaq
Stock Market, and (iii) the filing with the Secretary of State of Delaware of
the amendment to the Company's certificate of incorporation to increase the
authorized shares of Common Stock to 900,000,000; no registration or filing
with, or consent or approval of, or other action by, any federal, state or other
governmental agency, court, instrumentality or securities exchange (each, a
"GOVERNMENTAL AUTHORITY") or any other third person or entity is or will be
necessary for the valid execution, delivery and performance of this Agreement,
the Warrants or the Investor Rights Agreement or the issuance and delivery of
the shares of Preferred Shares, the Conversion Shares or the Warrant Shares.

                  SECTION 2.07 Financial Statements. (a) The Company has
furnished to the Purchasers the unaudited consolidated balance sheet of the
Company and its Subsidiaries as of March 31, 2002 (the "MARCH BALANCE SHEET")
and the related consolidated statements of operations, stockholders' equity and
cash flows for the three months then ended. All such financial statements
(including but not limited to any related schedules and/or notes) have been
prepared in accordance with generally accepted accounting principles in the
United States ("GAAP") consistently applied and consistent with prior periods,
except for normal year-end adjustments and the absence of footnotes. All such
financial statements fairly present in all material respects the consolidated
financial position of the Company and its Subsidiaries as of March 31, 2002, and
such statements of operations, stockholders' equity and cash flows fairly
present in all material respects the consolidated results of operations,
stockholders' equity and cash flows of the Company and its Subsidiaries for the
three months ended March 31, 2002.

                  (b) Except as and to the extent (i) reflected on the March
Balance Sheet, (ii) incurred since March 31, 2002 in the ordinary course of
business consistent with past practice, (iii) set forth on Schedule 2.07(b) of
the Disclosure Letter, or (iv) as disclosed in the Company SEC Filings, neither
the Company nor any of its Subsidiaries has any material debts, liabilities or
obligations of any kind or nature, whether known or unknown, secured or

                                       5
<PAGE>

unsecured, absolute, accrued, contingent or otherwise, and whether due or to
become due, that would be required to be reflected on a balance sheet, or the
notes thereto, prepared in accordance with GAAP.

                  (c) Except as disclosed in the Company SEC Filings, since
March 31, 2002, neither the Company nor any of its Subsidiaries has suffered any
Material Adverse Effect.

                  SECTION 2.08 SEC Filings. The Company has filed all forms,
reports and documents required to be filed with the Securities and Exchange
Commission (the "SEC") since the completion of the Company's initial public
offering on February 18, 2000, and the Company has made available to the
Purchasers, as filed with the SEC, complete and accurate copies of (i) the
Annual Report of the Company on Form 10-K for the years ended December 31, 1999,
2000 and 2001, and (ii) all other reports, statements and registration
statements (including but not limited to Current Reports on Form 8-K and
Quarterly Reports on Form 10-Q) filed by the Company with the SEC since December
31, 2000, in each case including but not limited to all amendments and
supplements (collectively, the "COMPANY SEC FILINGS"). The Company SEC Filings
(i) were prepared in compliance with the requirements of the Securities Act of
1933, as amended (the "SECURITIES ACT"), or the Securities Exchange Act of 1934,
as amended (the "EXCHANGE ACT"), and the rules and regulations thereunder, as
the case may be, and (ii) did not at the time of filing (or if amended,
supplemented or superseded by a filing prior to the date hereof, on the date of
that filing) contain any untrue statement of a material fact or omit to state a
material fact required to be stated therein or necessary in order to make the
statements therein, in light of the circumstances under which they were made,
not misleading.

                  SECTION 2.09 Absence of Certain Changes or Events. Except as
set forth in the Company SEC Filings, and except as otherwise expressly
contemplated by this Agreement, since March 31, 2002, neither the Company nor
any of its Subsidiaries has (a) issued any stock, bonds or other corporate
securities, (b) borrowed or refinanced any indebtedness for borrowed money, (c)
discharged or satisfied any material claim or incurred or paid any obligation or
liability (absolute or contingent) other than current liabilities shown on the
March Balance Sheet and current liabilities incurred since the date of such
balance sheet in the ordinary course of business consistent with past practice,
(d) in the case of the Company only, declared or made any payment or
distribution to stockholders, or purchased or redeemed any shares of its capital
stock or other securities, (e) sold, exchanged or otherwise disposed of any
material assets except in the ordinary course of business, (f) waived any
valuable right or a material debt owed to it, (g) suffered any damage,
destruction or loss, whether or not covered by insurance, which has materially
and adversely affected its business, (h) made any material change or material
amendment to a Material Agreement (as defined in Section 2.12), (i) suffered any
Material Adverse Effect or (j) except in connection with this Agreement and the
transactions contemplated hereby, entered into any agreement, letter of intent
or similar undertaking to take any of the actions listed in clauses (a) through
(i) above.

                  SECTION 2.10 Actions Pending. Except as disclosed in the
Company SEC Filings or as set forth on Schedule 2.10 of the Disclosure Letter,
there is no action, suit, arbitration, investigation or proceeding pending or,
to the best knowledge of the Company, threatened against or affecting the
Company or any of its Subsidiaries or to which the Company's or any of its
Subsidiaries' property is subject, before any court or by or before any

                                       6
<PAGE>

governmental body or arbitration board or tribunal, which the Company would be
required to disclose pursuant to Item 1 of Part II of Form 10-Q if such Form
10-Q were required to be filed on and as of the date hereof. For the purposes of
this Agreement, the term "best knowledge of the Company" shall mean the actual
knowledge, upon reasonable inquiry, of the executive officers of the Company.

                  SECTION 2.11 Compliance with Law; Permits. Neither the Company
nor any of its Subsidiaries is in default under or in violation of, in any
respect, any order or decree of any court, Governmental Authority, arbitrator or
arbitration board or tribunal or under any laws, ordinances, governmental rules
or regulations to which the Company or any of such Subsidiaries or any of their
respective properties or assets is subject, except where such default would not
have a Material Adverse Effect. The Company possesses all permits,
authorizations, approvals, registrations, variances and licenses ("PERMITS")
necessary for the Company or its Subsidiaries to own, use and maintain their
properties and assets or required for the conduct of its business in
substantially the same manner as it is currently conducted, except where the
failure to possess any such Permit would not have a Material Adverse Effect.
Except to the extent the failure of any of the following to be correct would not
have a Material Adverse Effect, each Permit is in full force and effect, and no
proceeding is pending or, to the best knowledge of the Company, threatened to
modify, suspend, revoke or otherwise limit any Permit, and no administrative or
governmental actions have been taken or, to the best knowledge of the Company,
threatened in connection with the expiration or renewal of any Permit.

                  SECTION 2.12 Contracts. Except as disclosed in the Company SEC
Filings or as set forth on Schedule 2.12.A of the Disclosure Letter, there are
no contracts or agreements that are material to the conduct of the Company's
business or to the financial condition or results of operations of the Company
and its Subsidiaries, taken as a whole, that the Company would be required to
disclose pursuant to paragraph 10 of Item 601 of Regulation S-K if a Form 10-Q
were required to be filed on and as of the date hereof. Except as set forth in
the SEC Filings or on Schedule 2.12.B of the Disclosure Letter, each of the
agreements (collectively, the "MATERIAL AGREEMENTS") disclosed as an exhibit in
the Company SEC Filings in response to paragraph 10 of Item 601 of Regulation
S-K under which there are continuing rights or obligations is a valid and
enforceable obligation of the Company and, to the best knowledge of the Company,
of the other parties thereto, except where the failure to be valid or
enforceable would not have a Material Adverse Effect and provided that no
representation is made as to the enforceability of such agreements to the extent
that their enforceability may be subject to applicable bankruptcy, insolvency,
reorganization, moratorium or similar laws affecting enforceability of
creditors' rights generally or by general equitable principles. Except as set
forth on Schedule 2.12.B of the Disclosure Letter, to the best knowledge of the
Company, the Company has not been notified in writing of any claim that any
Material Agreement is not valid and enforceable in accordance with its terms for
the periods stated therein, or that there is under any such contract any
existing default or event of default or event that with notice or lapse of time
or both would constitute such a default, except any such failure to be valid or
enforceable and any such defaults that, in the aggregate, would not have a
Material Adverse Effect. The Company is not a party to any contract or agreement
that would result in an obligation of the Company to make any payments under
such agreement or contract solely as a result of the execution and delivery of
this Agreement or the consummation of any of the transactions contemplated

                                       7
<PAGE>

hereby or thereby (including, but not limited to, the issuance or delivery of
the Warrants and the issuance, sale and delivery of the Preferred Shares, the
Conversion Shares or the Warrant Shares). The Company has heretofore made
available true and correct copies of the Material Agreements to the Purchasers.

                  SECTION 2.13 Insurance. The Company maintains insurance with
respect to its businesses, properties, officers, directors and employees
customary with industry practices. The Company has heretofore made available for
inspection by the Purchasers true and complete copies of all such insurance
policies. Such policies are, and will be, on the Closing Date, in full force and
effect and are, and will be upon the Closing, free from any right of termination
or limitation (other than for non-payment) on the part of the insurance
carriers. None of the Company or any of its Subsidiaries has received any notice
of cancellation or termination in respect of any such policy or is in default
thereunder.

                  SECTION 2.14 Offering of the Preferred Shares. Assuming the
accuracy of the representations and warranties of the Purchasers set forth in
Article III hereof and the accuracy of the representations and warranties of the
purchasers under the Securities Purchase Agreement with the Company dated as of
March 6, 2002, neither the Company nor any Person acting on the Company's behalf
has taken or will take any action (including but not limited to, any offer,
issuance or sale of any securities of the Company under circumstances which
might require the integration of such transactions with the sale of the
Preferred Shares or the Warrants under the Securities Act or the rules and
regulations of the SEC thereunder) which would require the offering, issuance or
sale of the Preferred Shares or the Warrants to the Purchasers (but not
including the resale thereof) pursuant to this Agreement to be registered under
the Securities Act.

                  SECTION 2.15 Related-Party Transactions. Except (i) as set
forth in the Company SEC Filings or as set forth on Schedule 2.15 of the
Disclosure Letter, or (ii) as contemplated hereby, there are no existing
material arrangements or proposed material transactions between the Company and
any Person or entity that the Company would be required to disclose pursuant to
Item 404 of Regulation S-K of the SEC if a proxy statement of the Company were
required to be filed on or as of the date hereof, other than arrangements or
transactions between the Company and any of the Purchasers.

                  SECTION 2.16 Brokers. All negotiations relative to this
Agreement and the transactions contemplated hereby have been carried on by the
Company directly with the Purchasers, without the intervention of any other
Person on behalf of the Company in such manner as to give rise to any valid
claim by any other Person against the Company for a finder's fee, brokerage
commission or similar payment.

                  SECTION 2.17 Consent Effectiveness Date. The Written Consent
will become effective on July 12, 2002 (the "CONSENT EFFECTIVENESS DATE"), all
as described in the Information Statement, without changes or modifications
thereto.

                  SECTION 2.18 Registration Rights. Except as set forth in the
Investor Rights Agreement, the Company has not granted or agreed to grant any
Person any registration rights (including piggyback registration rights) to have
any of the presently outstanding securities of the Company or any of its
securities that may subsequently be issued registered with the United States
Securities and Exchange Commission.

                                       8
<PAGE>

                  SECTION 2.19 Disclosure. Neither the representations and
warranties contained in this Agreement, nor any other documents or certificates
made or delivered in connection herewith, contain any untrue statement of a
material fact or omit to state a material fact necessary to make the statements
herein, in light of the circumstances in which they were made, not misleading.

              III. REPRESENTATIONS AND WARRANTIES OF THE PURCHASER

                  Each Purchaser, severally and not jointly, represents and
warrants to the Company on the date hereof and on the Closing Date, as follows:

                  SECTION 3.01 Organization. Such Purchaser is duly organized,
validly existing and in good standing under the laws of its jurisdiction of
organization and has all requisite corporate, limited liability or limited
partnership power and authority to operate its properties and assets and to
carry on its business as it is now being conducted.

                  SECTION 3.02 Authorization. The execution, delivery and
performance by such Purchaser of this Agreement, and the purchase and receipt by
such Purchaser of the Preferred Shares being acquired by it hereunder, have been
duly authorized by all requisite action on the part of such Purchaser and will
not violate any provision of applicable law, any order of any court or other
agency of government, the charter or other governing documents of such
Purchaser.

                  SECTION 3.03 Validity. This Agreement has been duly executed
and delivered by such Purchaser and constitutes the legal, valid and binding
obligation of such Purchaser, enforceable against such Purchaser in accordance
with its terms, except as may be limited by applicable bankruptcy, insolvency,
moratorium, reorganization and similar laws relating to or affecting creditors'
rights generally and general equitable principles.

                  SECTION 3.04 Investment Representations. (a) Such Purchaser is
acquiring the Preferred Shares and the Warrant for its own account, for
investment, and not with a view toward the resale or distribution thereof.

                  (b) Such Purchaser understands that it must bear the economic
risk of such Purchaser's investment for an indefinite period of time, because
the Preferred Shares and, when issued upon conversion of Preferred Shares, the
Conversion Shares, and the Warrant and, when issued upon exercise of the
Warrant, the Warrant Shares, are not registered under the Securities Act or any
applicable state securities laws and may not be resold unless subsequently
registered under the Securities Act and such other laws or unless an exemption
from such registration is available.

                  (c) Such Purchaser has the ability to bear the economic risks
of such investment in the Preferred Shares and the Warrant being purchased
hereunder for an indefinite period of time. Such Purchaser further acknowledges
that it has received copies of the Company SEC Filings and has had the
opportunity to ask questions of, and receive answers from, officers of the
Company with respect to the business and financial condition of the Company and
the terms and conditions of the offering of the Preferred Shares and to obtain
additional information necessary to verify such information or can acquire it
without unreasonable effort or expense.

                                       9
<PAGE>

                  (d) Such Purchaser has such knowledge and experience in
financial and business matters that such Purchaser is capable of evaluating the
merits and risks of its investment in the Preferred Shares and the Warrants.
Such Purchaser further represents that it is an "accredited investor" as such
term is defined in Rule 501 of Regulation D of the SEC under the Securities Act
with respect to its purchase of the Preferred Shares and acquisition of the
Warrant, and that any such Purchaser that is a limited partnership has not been
formed solely for the purpose of purchasing the Preferred Shares or the Warrant.

                  SECTION 3.05 Governmental Approvals; Consents. No registration
or filing with, or consent or approval of, or other action by, any Governmental
Authority is or will be necessary by the Purchaser for the valid execution,
delivery and performance of this Agreement.

                          IV. COVENANTS OF THE COMPANY

                  SECTION 4.01 Access to Information. From the date hereof until
the Closing Date, the Company will (a) furnish to the Purchasers and their
authorized representatives such financial and operating data and other
information relating to the Company and its Subsidiaries as such Persons may
reasonably request and (b) instruct its counsel, independent accountants and
financial advisors to cooperate with the Purchasers and their authorized
representatives in their investigation of the Company. Any investigation
pursuant to this Section shall be conducted in such manner as not to interfere
unreasonably with the conduct of the business of the Company.

                  SECTION 4.02 Compliance with Conditions; Commercially
Reasonable Efforts. The Company shall use all commercially reasonable efforts to
cause all conditions precedent to the obligations of the Company and the
Purchasers to be satisfied. Upon the terms and subject to the conditions of this
Agreement, the Company will use all commercially reasonable efforts to take, or
cause to be taken, all action, and to do, or cause to be done, all things
necessary, proper or advisable consistent with applicable laws to consummate and
make effective in the most expeditious manner practicable the issuance, sale and
delivery of the Preferred Shares to the Purchasers in accordance with the terms
of this Agreement.

                  SECTION 4.03 Consents and Approvals. The Company (a) shall use
all commercially reasonable efforts to obtain all necessary consents, waivers,
authorizations and approvals of all Governmental Authorities, and of all other
Persons required in connection with the execution, delivery and performance of
this Agreement or the consummation of the transactions contemplated hereby; and
(b) shall diligently assist and cooperate with the Purchasers in preparing and
filing all documents required to be submitted by the Purchasers to any
Governmental Authority in connection with the issuance, sale and delivery of the
Preferred Shares to the Purchasers (which assistance and cooperation shall
include timely furnishing to the Purchasers all information concerning the
Company and its Subsidiaries that counsel to the Purchasers reasonably
determines is required to be included in such documents or would be helpful in
obtaining any such required consent, waiver, authorization or approval).

                  SECTION 4.04 Reservation of Shares. From and after the Consent
Effectiveness Date referred to in Section 2.17 and so long as any of the
Preferred Shares or the Warrants are outstanding, the Company shall keep
reserved for issuance a sufficient number of shares of Common Stock to satisfy
its conversion obligations under the Certificate of Designation and its exercise

                                       10
<PAGE>

obligations under the Warrants. The Company shall cause to be filed, within 15
days of the Consent Effectiveness Date, an amendment to its certificate of
incorporation increasing the authorized number of shares of Common Stock to
900,000,000.

                  SECTION 4.05 Listing of Shares. The Company shall cause the
Conversion Shares issuable upon conversion of the Preferred Shares and the
Warrant Shares to be issued upon exercise of the Warrants to be listed or
otherwise eligible for trading on the NASDAQ Small Cap Market System or such
other exchange or market at which the Common Stock is traded at the time of
conversion or exercise.

                  SECTION 4.06 Financial Statements and Reports. So long as the
Company is no longer subject to the reporting requirements of the Securities and
Exchange Act of 1934, as amended, and the Purchasers hold in the aggregate
Conversion Shares or Preferred Shares (or any securities into which such shares
have been converted into or exchanged for in a recapitalization or otherwise) or
convertible into Conversion Shares equal to at least 25% of the number of
Conversion Shares the Preferred Shares are convertible into on the Closing Date,
the Company shall comply with the provisions of Section 4.06(a) and (e) and
shall provide copies of the statements referred to in Sections 4.06(b), (c) and
(d) to each Purchaser:

                  (a) Books and Records. The Company shall at all times maintain
correct and complete books and records in which full and correct entries shall
be made of all its business transactions pursuant to a system of accounting
established and administered in accordance with GAAP to the extent applicable
and set aside on its books all such proper accruals and reserves as shall be
required under GAAP. The Company shall retain an accounting firm of nationally
recognized standing for the purpose of auditing its financial statements and
reports for each fiscal year.

                  (b) Monthly Statements. As soon as available, and in any event
within ten (10) days after the end of each month, copies of the balance sheets
of the Company as of the end of such month, and related statements of income and
cash flows of the Company for such month, in each case setting forth in
comparative form the figures for the corresponding month of the preceding fiscal
year, all in reasonable detail, and certified by the chief financial officer of
the Company, as being true and correct in all material respects and, except for
the lack of notes, as having been prepared in accordance with GAAP, subject to
year-end audit adjustments.

                  (c) Quarterly Statements. As soon as available, and in any
event within forty-five (45) days after the end of each respective quarterly
fiscal period (except the last) of each fiscal year of the Company, copies of
the balance sheets of the Company as of the end of such quarterly fiscal period,
and the related statements of income and cash flows of the Company for such
quarterly fiscal period and for the portion of the fiscal year ending with such
period, in each case setting forth in comparative form the figures for the
corresponding period of the preceding fiscal year, all in reasonable detail, and
certified by the chief financial officer of the Company, as being true and
correct in all material respects and, except for the lack of notes, as having
been prepared in accordance with GAAP, subject to year-end audit adjustments.

                  (d) Annual Statements. As soon as available and in any event
within one hundred twenty (120) days after the close of each respective fiscal
year of the Company, copies of the balance sheets of the Company as of the close

                                       11
<PAGE>

of such fiscal year and the related statements of income and cash flows of the
Company for such fiscal year, in each case, setting forth in comparative form
the figures for the preceding fiscal year, all in reasonable detail and
accompanied by (i) an opinion thereon of independent public accountants of the
Company to the effect that such financial statements have been prepared in
accordance with GAAP and fairly present the financial conditions and results of
operations of the Company and (ii) such accountant's management letter.

                  (e) Additional Information. The Company shall send to each
Purchaser, (i) all written materials and other information given to the
directors of the Company at the same time such materials are given to the
directors and (ii) promptly upon becoming available, copies of all financial
statements, reports, notices, press releases, proxy statements and other
documents sent by the Company to its stockholders.

                         V. COVENANTS OF THE PURCHASERS

                  SECTION 5.01 Agreement to Take Necessary and Desirable
Actions. Each Purchaser shall (a) subject to the satisfaction of the conditions
set forth in Section 6.01, execute and deliver such other documents,
certificates, agreements and other writings and (b) take such other actions, in
each case, as may be reasonably necessary, desirable or requested by the Company
in order to consummate or implement the issuance, sale and delivery of the
Preferred Shares to the Purchasers in accordance with the terms of this
Agreement.

                  SECTION 5.02 Compliance with Conditions; Commercially
Reasonable Efforts. Each Purchaser will use all commercially reasonable efforts
to cause all of the obligations imposed upon it in this Agreement to be duly
complied with, and to cause all conditions precedent to the obligations of the
Company and the Purchasers to be satisfied. Upon the terms and subject to the
conditions of this Agreement, each Purchaser will use all commercially
reasonable efforts to take, or cause to be taken, all action, and to do, or
cause to be done, all things necessary, proper or advisable consistent with
applicable law, to consummate and make effective in the most expeditious manner
practicable the issuance, sale and delivery of the Preferred Shares to such
Purchaser in accordance with the terms of this Agreement.

                  SECTION 5.03 Consents and Approvals. Each Purchaser (a) shall
use all commercially reasonable efforts to obtain all necessary consents,
waivers, authorizations and approvals of all Governmental Authorities, and of
all other Persons required in connection with the execution, delivery and
performance of this Agreement, or the consummation of transactions contemplated
hereby and (b) shall diligently assist and cooperate with the Company in
preparing and filing all documents required to be submitted by the Company to
any Governmental Authority in connection with such transactions (which
assistance and cooperation shall include, without limitation, timely furnishing
to the Company all information concerning such Purchaser that counsel to the
Company reasonably determines is required to be included in such documents or
would be helpful in obtaining any such required consent, waiver, authorization
or approval).

                                       12
<PAGE>

                            VI. CONDITIONS PRECEDENT

                  SECTION 6.01 Conditions Precedent to the Obligations of the
Purchasers in connection with the Closing. With regard to the Closing, the
obligations of the Purchasers hereunder are, at their option, subject to the
satisfaction of the following conditions:

                  (a) Representations and Warranties to Be True and Correct. The
representations and warranties of the Company contained in this Agreement that
are qualified as to materiality or Material Adverse Effect shall be true and
correct and all other representations and warranties of the Company shall be
true and correct in all material respects, each on the Closing Date with the
same force and effect as though such representations and warranties had been
made on and as of such date.

                  (b) Performance. The Company shall have performed and complied
in all material respects with all agreements, covenants and conditions contained
herein required to be performed or complied with by it prior to or on the
Closing Date.

                  (c) All Proceedings to Be Satisfactory. All corporate and
other proceedings to be taken by the Company and all waivers and consents to be
obtained by the Company in connection with the transactions contemplated hereby
shall have been taken or obtained by the Company.

                  (d) Legal Proceedings. On the Closing Date, no preliminary or
permanent injunction or other order, decree or ruling issued by any court of
competent jurisdiction nor any statute, rule, regulation or order entered,
promulgated or enacted by any governmental, regulatory or administrative agency
or authority, or national securities exchange shall be in effect that would
prevent the consummation of the transactions contemplated by this Agreement.

                  (e) Governmental Approvals. All necessary governmental and
regulatory consents and approvals and necessary third party consents shall have
been obtained.

                  (f) No Material Adverse Effect. Except for the effects of the
matters disclosed in the Company SEC Filings, there shall have been no Material
Adverse Effect since March 29, 2002, the date on which the Company filed its
Form 10-K for the year ended December 31, 2001.

                  (g) Opinions of Counsel. The Purchasers shall have received
from Hogan & Hartson, L.L.P. and the chief legal officer of the Company two
opinions, each dated the Closing Date, substantially in the forms delivered to
purchasers of Preferred Stock on March 18, 2002.

                  (h) GECC Waiver. The Purchasers shall have received a copy of
a waiver from General Electric Capital Corporation consenting to the issuance of
the Preferred Stock and the Warrants to the Constellation Entities.

                  (i) Board Side Letter. The Purchasers shall have received an
executed copy the Side Letter dated the date hereof among the Company, the
Constellation Entities and certain WCAS Investors (as defined in the Investor
Rights Agreement).

                                       13
<PAGE>

                  SECTION 6.02 Conditions Precedent to the Obligations of the
Company in Connection with the Closing. With regard to the Closing, the
obligations of the Company hereunder are, at its option, subject to the
satisfaction of the following conditions:

                  (a) Representations and Warranties to Be True and Correct. The
representations and warranties of the Purchasers contained in this Agreement
shall be true and correct in all material respects on the Closing Date with the
same effect as though such representations and warranties had been made on and
as of such date.

                  (b) Performance. The Purchasers shall have performed and
complied in all material respects with all agreements, covenants and conditions
contained herein required to be performed or complied with by them prior to or
on the Closing Date.

                  (c) All Proceedings to Be Satisfactory. All proceedings to be
taken by the Purchasers and all waivers and consents to be obtained by the
Purchasers in connection with the transactions contemplated hereby shall have
been taken or obtained by the Purchasers.

                  (d) Legal Proceedings. On the Closing Date, no preliminary or
permanent injunction or other order, decree or ruling issued by any court of
competent jurisdiction nor any statute, rule, regulation or order entered,
promulgated or enacted by any Governmental Authority shall be in effect that
would prevent the consummation of the transactions contemplated by this
Agreement.

                  (e) Governmental Approvals. All necessary governmental
approvals and regulatory approvals and necessary third party consents shall have
been obtained.

                  VII. SURVIVAL OF REPRESENTATIONS; INDEMNITY

                  SECTION 7.01 Survival of Representations. Subject as set forth
below, all representations and warranties made by any party hereto in this
Agreement or pursuant hereto shall survive for the period commencing on the date
hereof and ending on the second anniversary of the date hereof.

                  SECTION 7.02 General Indemnity. (a) Subject to the terms and
conditions of this Article, the Company hereby agrees to indemnify, defend and
hold the Purchasers harmless from and against all demands, claims, actions or
causes of action, assessments, losses, damages, liabilities, costs and expenses,
including, without limitation, interest, penalties and reasonable attorneys'
fees and expenses (collectively, "DAMAGES"), asserted against, resulting to,
imposed upon or incurred by the Purchasers by reason of or resulting from a
breach of any representation, warranty or covenant of the Company contained in
or made pursuant to this Agreement.

                  (b) Subject to the terms and conditions of this Article VII,
each Purchaser hereby agrees, severally and not jointly, to indemnify, defend
and hold the Company harmless from and against all Damages asserted against,
resulting to, imposed upon or incurred by the Company by reason of or resulting
from a breach of any representation, warranty or covenant of the Purchaser
contained in Section 3 and Section 5 this Agreement.

                                       14
<PAGE>

                  SECTION 7.03 Conditions of Indemnification. The respective
several obligations and liabilities of the Purchasers, on the one hand, and the
Company, on the other hand (the "INDEMNIFYING PARTY"), to the other (the "PARTY
TO BE INDEMNIFIED") under Section 7.02 hereof with respect to claims resulting
from the assertion of liability by third parties shall be subject to the
following terms and conditions:

                  (a) within 20 days after receipt of notice of commencement of
any action or the assertion in writing of any claim by a third party, the party
to be indemnified shall give the indemnifying party written notice thereof
together with a copy of such claim, process or other legal pleading, and the
indemnifying party shall have the right to undertake the defense thereof by
representatives of its own choosing;

                  (b) in the event that the indemnifying party, by the 30th day
after receipt of notice of any such claim (or, if earlier, by the tenth day
preceding the day on which an answer or other pleading must be served in order
to prevent judgment by default in favor of the Person asserting such claim),
does not elect to defend against such claim, the party to be indemnified will
(upon further notice to the indemnifying party) have the right to undertake the
defense, compromise or settlement of such claim on behalf of and for the account
and risk of the indemnifying party, subject to the right of the indemnifying
party to assume the defense of such claim at any time prior to settlement,
compromise or final determination thereof, provided that the indemnifying party
shall be given at least 15 days prior written notice of the effectiveness of any
such proposed settlement or compromise;

                  (c) anything in this Section 7.03 to the contrary
notwithstanding (i) if there is a reasonable probability that a claim may
materially and adversely affect the indemnifying party other than as a result of
money damages or other money payments, the indemnifying party shall have the
right, at its own cost and expense, to compromise or settle such claim, but (ii)
the indemnifying party shall not, without the prior written consent of the party
to be indemnified, settle or compromise any claim or consent to the entry of any
judgment which does not include as an unconditional term thereof the giving by
the claimant or the plaintiff to the party to be indemnified a release from all
liability in respect of such claim; and

                  (d) in connection with any such indemnification, the
indemnified party will cooperate in all reasonable requests of the indemnifying
party.

                               VIII. MISCELLANEOUS

                  SECTION 8.01 Restrictions on Transfer; Legends. (a) The
Purchasers agree that they will not sell, transfer, assign, pledge, encumber,
distribute or otherwise dispose of the Warrants or any Warrant Shares (a
"TRANSFER") unless such Transfer is made pursuant to an effective registration
statement under the Securities Act or pursuant to an exemption from, or in a
transaction not subject to, the registration requirements of the Securities Act
(and, in either case, in compliance with all applicable state securities laws).

                  (b) The Company agrees, and the Purchasers understand and
consent, that the Company will not cause or permit the Transfer of the Warrants
or any Warrant Shares to be made on its books (or on any register of securities
maintained on its behalf) unless the Transfer is permitted by, and has been made

                                       15
<PAGE>

in accordance with, (x) the terms of this Agreement and (y) all applicable
federal and state securities laws. The Purchasers agree that in connection with
any Transfer of the Warrants or any Warrant Shares that is not made pursuant to
a registered public offering, the Company may request an opinion of legal
counsel reasonably acceptable to the Company stating that such transaction is
exempt from registration under all applicable laws. Any Transfer of the Warrants
or any Warrant Shares other than in accordance with this Section will be void.

                  (c) From and after the date hereof (and until such time as
such securities have been sold to the public pursuant to an effective
registration statement under the Securities Act or pursuant to Rule 144 or the
holder of such securities shall have requested the issuance of new certificates
in writing and delivered to the Company an opinion of legal counsel reasonably
acceptable to the Company to such effect), all certificates representing the
Warrants and each certificate representing the Warrant Shares and any shares of
capital stock received in respect thereof, whether by reason of a stock split or
share reclassification thereof, a stock dividend thereon or otherwise, and each
certificate for any such securities issued to subsequent transferees of any such
certificate that are held by the Purchasers shall bear legends which shall state
the following:

                  "THE SHARES EVIDENCED BY THIS CERTIFICATE HAVE NOT BEEN
         REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, NOR ANY
         APPLICABLE STATE LAW, AND NO INTEREST HEREIN MAY BE OFFERED, SOLD,
         ASSIGNED, DISTRIBUTED, PLEDGED OR OTHERWISE TRANSFERRED UNLESS (A)
         THERE IS AN EFFECTIVE REGISTRATION STATEMENT WITH RESPECT THERETO UNDER
         SAID ACT AND LAWS OR (B) SUCH TRANSACTION IS EXEMPT FROM SUCH
         REGISTRATION."

                  SECTION 8.02 Expenses, etc.. All costs and expenses incurred
in connection with this Agreement shall be paid by the party incurring such cost
or expense; provided, that, upon execution of this Agreement, the Company shall
pay the reasonable and actual legal, due diligence and other reasonable out of
pocket costs and expenses of the Purchasers.

                  SECTION 8.03 Survival of Agreements. All covenants, agreements
and representations and warranties (except in the case of representations and
warranties, as limited in Section 7.01) made herein shall survive the execution
and delivery of this Agreement and the issuance, sale and delivery of the
Preferred Shares, notwithstanding any investigation made at any time by or on
behalf of any party hereto. All statements contained in any certificate or other
instrument delivered by the Company hereunder shall be deemed to constitute
representations and warranties made by the Company.

                  SECTION 8.04 Notices. Any notice or other communications
required or permitted hereunder shall be deemed to be sufficient if contained in
a written instrument delivered in person or duly sent by first class certified
mail, postage prepaid, by nationally recognized overnight courier, or by
facsimile addressed to such party at the address or facsimile number set forth
below or such other address or facsimile number as may hereafter be designated
in writing by the addressee to the addressor listing all parties:

                                       16
<PAGE>

                  if to the Company, to

                           SAVVIS Communications Corporation
                           12851 World Gate Drive
                           Herndon, Virginia 20170
                           Fax: (703) 234-8315
                           Attention: General Counsel

                  with a copy to

                           Hogan & Hartson L.L.P.
                           885 Third Avenue, 26th Floor
                           New York, New York 10022
                           Fax: (212) 918-6100
                           Attention: Christine M. Pallares, Esq.

                  if to the Purchaser to:

                           Constellation Venture Capital II, L.P.
                           383 Madison Avenue
                           28th Floor
                           New York, New York 10179
                           Fax: (212) 272-9256
                           Attention: Ronald Celmer

                  with a copy to:

                           Morgan, Lewis & Bockius LLP
                           101 Park Avenue
                           New, York, New York 10178
                           Fax: (212) 309-6273
                           Attention: Ira White, Esq.

or, in any case, at such other address or addresses as shall have been furnished
in writing by such party to the other parties hereto. All such notices,
requests, consents and other communications shall be deemed to have been
received (a) in the case of personal delivery, on the date of such delivery, (b)
in the case of mailing, on the fifth business day following the date of such
mailing, (c) in the case of delivery by overnight courier, on the business day
following the date of delivery to such courier, and (d) in the case of
facsimile, when received.

                  SECTION 8.05 Press Releases and Public Announcements. All
public announcements or disclosures relating to this Agreement shall be made
only if mutually agreed upon by the Company and the Purchasers except to the
extent such disclosure is, in the reasonable good faith opinion of the Company
or the Purchasers, required by law or by regulation of any applicable national
stock exchange or any SEC recognized trading market or equivalent foreign
exchange or trading market; provided that any such required disclosure shall

                                       17
<PAGE>

only be made, to the extent consistent with law and regulation of any applicable
national stock exchange or SEC recognized trading market or equivalent foreign
exchange or trading market, after consultation with and agreement by the
Purchasers or the Company as applicable.

                  SECTION 8.06 Governing Law. This Agreement shall be governed
by and construed in accordance with the laws of the State of New York, without
regard to conflict of laws principles.

                  SECTION 8.07 Entire Agreement. This Agreement (including the
Schedules and Exhibits thereto) constitutes the entire agreement of the parties
with respect to the subject matter hereof and may not be amended or modified nor
any provisions waived except as set forth in Section 8.10.

                  SECTION 8.08 Assignment; No Third Party Beneficiaries. This
Agreement and the rights, duties and obligations hereunder may not be assigned
or delegated by the Company without the prior written consent of the Purchasers,
and may not be assigned or delegated by the Purchasers without the Company's
prior written consent. This Agreement and the provisions hereof shall be binding
upon and shall inure to the benefit of each of the parties and their respective
successors and permitted assigns. This Agreement is not intended to confer any
rights or benefits on any Persons other than the parties hereto, except as
expressly set forth in Section 7.02 or as contemplated by this Section 8.08. Any
designee or assignee permitted under this Section 8.08 is referred to herein as
a "PERMITTED DESIGNEE."

                  SECTION 8.09 Termination. (a) This Agreement may be terminated
at any time prior to the Closing:

                  (i) by mutual written agreement of the Company and the
         Purchasers;

                  (ii) by either the Company or the Purchasers if the Closing
         shall not have been consummated on or before August 31, 2002, unless
         extended by mutual agreement or unless the failure to consummate the
         Closing is attributable to a failure on the part of the party seeking
         to terminate this Agreement to perform any obligation required to be
         performed by such party at or prior to the Closing Date; or

                  (iii) by either the Company or the Purchasers if consummation
         of the transactions contemplated hereby to be consummated on the
         Closing Date would violate any nonappealable final order, decree or
         judgment of any court or Governmental Authority having competent
         jurisdiction.

                  (b) The party desiring to terminate this Agreement pursuant to
Section 8.09(a)(ii) or (iii) hereof shall promptly give notice of such
termination to the other party.

                  (c) If this Agreement is terminated as permitted by this
Section 8.09, such termination shall be without liability of either party (or
any stockholder, director, officer, employee, agent, consultant or
representative of such party) to the other parties to this Agreement; provided
that if such termination shall result from the willful (i) failure of either
party to fulfill a condition to the performance of the obligations of the other
party, (ii) failure of either party to perform a covenant of such party in this
Agreement or (iii) breach by either party hereto of any representation or

                                       18
<PAGE>

warranty or agreement contained herein, such party shall be fully liable for any
and all losses incurred or suffered by the other party as a result of such
failure or breach. The provisions of Sections 8.02, 8.03, 8.04, 8.05, 8.06, and
8.10 shall survive any termination hereof pursuant to this Section 8.09.

                  SECTION 8.10 Amendments and Waivers. (a) Any provision of this
Agreement may be amended or waived if, but only if, such amendment or waiver is
in writing and is signed, by the Company and the Purchasers.

                  (b) No failure or delay by any party in exercising any right,
power or privilege hereunder will operate as a waiver thereof, nor will any
single or partial exercise thereof preclude any other or further exercise
thereof or the exercise of any other right, power or privilege, nor will any
waiving of any right power or privilege operate to waive any other subsequent
right, power or privilege. The rights and remedies herein provided will be
cumulative and not exclusive of any rights or remedies provided by law.

                  SECTION 8.11 Counterparts. This Agreement may be executed in
two or more counterparts, each of which shall be deemed an original, but all of
which together shall constitute one and the same instrument.

                  SECTION 8.12 Parties in Interest. All covenants and agreements
contained in this Agreement by or on behalf of any party hereto shall bind and
inure to the benefit of the respective successors and Permitted Designees of
such party hereto whether so expressed or not.

                                       19
<PAGE>

                  IN WITNESS WHEREOF, the Company and the Purchaser have
executed this Agreement as of the day and year first above written.

                                  SAVVIS COMMUNICATIONS CORPORATION

                                  By: /s/ Lane H. Blumenfeld
                                      Name: Lane H. Blumenfeld
                                      Title: Vice President and
                                             Acting General Counsel

                                  CONSTELLATION VENTURE CAPITAL II, L.P.

                                  By: Constellation Ventures Management, L.L.C.,
                                      its General Partner

                                  By: The Bear Stearns Companies, Inc.,
                                      its Managing Member

                                      By: /s/ Clifford H. Friedman
                                          Name: Clifford H. Friedman
                                          Title: SMD

                                  CONSTELLATION VENTURE CAPITAL
                                  OFFSHORE II, L.P.

                                  By: Constellation Ventures Management, L.L.C.,
                                      its General Partner

                                  By: The Bear Stearns Companies, Inc.,
                                      its Managing Member

                                      By: /s/ Clifford H. Friedman
                                          Name: Clifford H. Friedman
                                          Title: SMD

                                       20
<PAGE>

                                  THE BSC EMPLOYEE FUND IV, L.P.

                                  By: Constellation Ventures Management, L.L.C.,
                                      its General Partner

                                  By: The BSCGP, Inc.,
                                      its Managing Member

                                      By: /s/ Clifford H. Friedman
                                          Name: Clifford H. Friedman
                                          Title:   SMD

                                  CVC II PARTNERS, L.L.C.

                                      By: /s/ Clifford H. Friedman
                                          Name: Clifford H. Friedman
                                          Title: SMD

                                       21

<PAGE>

                                     ANNEX I
<TABLE>
<CAPTION>
PURCHASERS                                                    PREFERRED SHARES              PURCHASE PRICE
-----------------------------------------------               ----------------              --------------
<S>                                                                <C>                       <C>
Constellation Venture Capital II, L.P.                             10,576                    $ 10,576,000
Constellation Venture Capital Offshore II, L.P.                     5,000                       5,000,000
The BSC Employee Fund IV, L.P.                                      4,190                       4,190,000
CVC II Partners, L.L.C.                                               234                         234,000
                                                                                             ------------
Total                                                                                        $ 20,000,000
</TABLE>

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