EXHIBIT 10.24

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.



                     INTERNETMCI DEDICATED ACCESS AGREEMENT
                             FOR FULL RATE DS3 (ICB)

MCI  Telecommunications  Corporation ("MCI") will provide and Customer will take
internetMCI Dedicated Access Service on the terms contained in Attachments 1, 2,
3, 4, and 5 of this cover sheet (this cover sheet and such Attachments  referred
to collectively as the "Agreement"). Note: all correspondence should include the
entire account team and point of contact.

   ** The address for Contract Administration for Cindy Andreotti's regions is:

                           MCI
                           Contract Administration
                           Attention:  Justin Schlifkin
                           6 Concourse Parkway
                           Suite 1000
                           Atlanta, GA  30328

   ** The  address  for  Contract  Administration  for Vince  Corica's  regions,
      Government Markets and International Orders is:

                           MCI
                           Contract Administration
                           Attention:  Stacy Poppell
                           6 Concourse Parkway
                           Suite 1000
                           Atlanta, GA  30328

SAVVIS COMMUNICATIONS
-------------------------------           networkMCI, INC.
CUSTOMER NAME
 7777 BONHOMME, SUITE 1000                MCI Telecommunications Corporation
-------------------------------           Business Markets Headquarters
STREET ADDRESS                            Three Ravinia Drive
ST. LOUIS, MO 63635                       Atlanta, Georgia  30346
-------------------------------
CITY/STATE/ZIP
/s/ Gary Zimmerman                           /s/ Justin Schlifken
-------------------------------             ----------------------------------
CUSTOMER SIGNATURE                          AUTHORIZED MCI SIGNATURE
Gary Zimmerman, VP Network Ops               Justin Schlifkin
-------------------------------             ----------------------------------
PRINT NAME AND TITLE                        PRINT NAME AND TITLE
3/24/98                                      4/16/98
-------------------------------             ----------------------------------
CUSTOMER SIGNATURE DATE                     MCI ACCEPTANCE DATE

Notice:  This  Agreement will not go into effect until executed by both Customer
and MCI. This offer is subject to MCI's credit approval of Customer.


<PAGE>

                                  ATTACHMENT 1

                internetMCI DEDICATED ACCESS SERVICE DESCRIPTION

1.       OVERVIEW.

         MCI's  internetMCI  Dedicated  Access  Service  is a suite of  Internet
         access services that can be integrated with its existing  business long
         distance services. At the originating customer premises, the customer's
         equipment  places data into  Internet  Protocol  (IP) packets and gives
         each packet a  terminating  address.  MCI routes  registered IP packets
         over  the  MCI  IP  backbone  to  the  terminating  Internet  location.
         internetMCI  Dedicated  Access  is  available  at  speeds up to 45 Mbps
         (where access is available).

2.       TECHNICAL DESCRIPTION.

         MCI's Internet  Protocol (IP) backbone is a  packet-switched  interLATA
         data transport service comprised of dedicated 622 Mbps digital circuits
         connected  in a  mesh  topology  and  based  on  the  TCP/IP  suite  of
         protocols:  the Internet  standard.  IP provides a connectionless  data
         transfer service operating as layer three of the OSI reference model.

3.       ACCESS.

         Customers   currently   obtain  dedicated  access  to  internetMCI  via
         dedicated digital  facilities or via logical permanent virtual circuits
         (PVC) available as part of MCI's HyperStream Frame Relay service.

4.       AVAILABILITY.

         internetMCI  Dedicated  Access  Service is  available  nationwide  from
         cities listed in MCI Tariff FCC No. 1, Section C.12,  Table IV, Part A,
         as amended from time to time, or any successor tariff, unless otherwise
         specified.


[END OF ATTACHMENT 1]


                                     - 2 -
<PAGE>

                                  ATTACHMENT 2

                              TERMS AND CONDITIONS


1.  CHARGES:  You agree to pay all  applicable  charges for the Internet  access
service  ordered on the attached Cover Sheet (the  "Service").  Charges shall be
invoiced  monthly and are due 30 days net. Amounts not paid within 30 days after
the date of the  invoice  will be  considered  past due.  Prices do not  include
applicable  taxes,  for which you are  responsible.  Rates  and  charges  may be
changed  by MCI per  the  terms  of  Attachment  3,  and  you  agree  to pay any
additional charges which may result. If the Service becomes tariffed, the tariff
will supersede any conflicting provisions of this Agreement.

MCI may require, in MCI's sole discretion, alternate or additional security from
Customer.  Customer's  failure or refusal to comply with such  requirement  upon
MCI's request  therefore may result in the  cancellation  of this  Agreement and
Customer's  service for cause.  At MCI's request,  you shall provide a letter of
credit or provide a security  deposit to assure payment.  Letters of credit must
be  irrevocable  to be  acceptable  as  security  deposits.  MCI may reject such
letters of credit if they contain any conditions  which MCI finds  objectionable
in MCI's sole  discretion.  MCI shall release any letter of credit or return any
security  deposit  within  thirty (30) days after the later of: (a) the customer
terminating  service with MCI, and, (b) the customer  satisfying all outstanding
invoices and indebtedness shown on MCI's books and records of account.

2. TERM AND  TERMINATION:  The service  term begins when MCI's  circuit has been
fully installed and tested and the Service is available for your use, regardless
of the status of your  equipment.  The term of the  Service  ("Term")  is as set
forth in Attachment 3 and  automatically  shall renew for successive thirty (30)
day Terms at MCI's then-current month-to-month rates, regardless of the original
Term,  unless  either party  provides  the other thirty (30) days prior  written
notice  that it does not wish to renew.  You may  terminate  Service  on 30 days
prior written  notice and will be liable for any  applicable  early  termination
charges.  MCI may suspend or  terminate  Service if you  materially  breach this
Agreement,  including  failure  to pay for any past  due  amounts  for  invoiced
services as set forth in Section 1 above,  and do not cure such breach  within 3
days (72 hours) of notice;  provided, that MCI may terminate immediately without
notice in order to prevent  damage to or  degradation  of its  Internet  network
integrity which may be caused by the Customer or anyone using Customer's access,
or to  comply  with any law,  regulation,  court  order,  or other  governmental
request  order which  requires  immediate  action,  or for a violation  of MCI's
Policy Against  Spamming or for other behavior that in MCI's sole discretion may
be deemed to be illegal,  or otherwise to protect MCI from legal liability.  MCI


                                     - 3 -
<PAGE>

will endeavor to give Customer notice regarding the reason(s) for termination as
soon as reasonably practicable after such termination.

3.  RIGHTS  AND  OBLIGATIONS  OF  CUSTOMER:  You  shall at your own  expense  be
responsible for all site  preparation  activities  necessary for installation of
the  Service.  You shall give MCI and its  suppliers  reasonable  access to your
premises at all  reasonable  times.  You shall not use the Service or permit any
use of the Service which is illegal,  unlawful,  or harassing,  which  infringes
upon another's  intellectual  property  rights,  or which otherwise  constitutes
network abuse,  and you shall be responsible for any such misuse of the Service.
You shall indemnify MCI and its affiliates  against any liabilities  incurred by
them as a  result  of such  misuse.  You  also  will  pay to MCI the  reasonable
attorneys  fees and  costs,  including  allocable  costs  of in  house  counsel,
incurred  by MCI in  enforcing  this  Agreement.  You shall be  responsible  for
communicating  with  your  own  users  of the  Service,  and  for  handling  all
complaints  and  trouble  reports  made by such  users.  You  must  comply  with
reasonable  security  procedures  and standards with respect to your own routers
that interface with the Service. MCI may communicate security issues to you from
time to time when abuse or misuse is observed or reported by others.

4.  EQUIPMENT  AND  SOFTWARE:  MCI  is not  responsible  for  the  installation,
maintenance,  compatibility  or  performance  of any  equipment  or software not
provided by MCI,  and you shall  indemnify  MCI and its  affiliates  against any
infringement  claims arising out of such third party  equipment or software with
the Service. If such third party equipment or software impairs the Service,  you
remain liable for payment,  and if such third party equipment is likely to cause
hazard or service  obstruction,  you shall  eliminate  such  likelihood at MCI's
request. MCI will troubleshoot difficulties caused by such third party equipment
or software at your request, at MCI's standard rates and terms. In the event you
provide any router to interface with the Service, you must cooperate with MCI in
configuring  and managing  such  router(s) in order to implement and operate the
Service.

5.  SERVICE  OBJECTIVES:  In providing  the  Service,  MCI will use its diligent
efforts to meet the service  objectives  as  specified  in  Attachment  5 hereto
(Service Level Agreement).

6. MCI OBLIGATIONS; DISCLAIMER OF WARRANTIES: MCI shall operate and maintain the
Service,  contingent  upon  MCI's  ability to  maintain  necessary  licenses  or
permissions  and  MCI's  network  capacity  and  connection  availability.   You
understand  that,  except for certain  services  specifically  identified as MCI
services,  MCI does not  operate  or control  the  Internet.  YOU  ASSUME  TOTAL
RESPONSIBILITY  FOR YOUR AND  YOUR  USERS'  USE OF THE  INTERNET.  MCI  MAKES NO
EXPRESS OR IMPLIED  WARRANTIES,  REPRESENTATIONS  OR ENDORSEMENTS  REGARDING ANY
MERCHANDISE,  INFORMATION,  PRODUCTS OR SERVICES  PROVIDED THROUGH THE INTERNET.
THE


                                     - 4 -
<PAGE>

SERVICE IS PROVIDED ON AN "AS IS" AND "AS AVAILABLE" BASIS WITHOUT WARRANTIES OF
ANY KIND, EXPRESS OR IMPLIED,  INCLUDING BUT NOT LIMITED TO WARRANTIES OF TITLE,
NONINFRINGEMENT  OR IMPLIED  WARRANTIES  OF  MERCHANTABILITY  OR  FITNESS  FOR A
PARTICULAR PURPOSE. NO ADVICE OR INFORMATION GIVEN BY MCI'S EMPLOYEES, AGENTS OR
CONTRACTORS  SHALL  CREATE A  WARRANTY.  MCI has no  obligation  to monitor  the
Service;  however,  MCI may monitor the Service and disclose  information gained
from  such  monitoring  in  order  to  satisfy  any  law,  regulation  or  other
governmental request, to operate the Service and administer MCI's network, or to
protect itself or its  subscribers.  MCI reserves the right to refuse to post or
to remove any  information or materials,  in whole or in part,  that in its sole
discretion are unacceptable,  undesirable, or in violation of this Agreement. In
no event  shall MCI be deemed  liable for any  failure or delay due to any cause
beyond MCI's control.

7. LIMITATION OF LIABILITY:  UNDER NO CIRCUMSTANCES  SHALL MCI BE LIABLE FOR ANY
INDIRECT,  INCIDENTAL,  SPECIAL,  PUNITIVE OR CONSEQUENTIAL  DAMAGES THAT RESULT
FROM YOUR OR YOUR USERS' USE OF OR  INABILITY TO ACCESS ANY PART OF THE INTERNET
OR  YOUR  OR  YOUR  USERS'  RELIANCE  ON OR  USE  OF  INFORMATION,  SERVICES  OR
MERCHANDISE  PROVIDED ON OR THROUTH THE SERVICE,  OR THAT RESULT FROM  MISTAKES,
OMISSIONS,  INTERRUPTIONS,  LOSS, THEFT, OR DELETION OR FILES, ERRORS,  DEFECTS,
DELAYS IN OPERATION, OR TRANSMISSION,  OR ANY FAILURE OF PERFORMANCE. If you are
dissatisfied with the Service or these Terms and Conditions, your sole remedy is
to terminate this Agreement.

8. DOMAIN NAME REGISTRATION;  EQUIPMENT:  At your request and expense, MCI shall
assist in the  registration of your domain name(s),  provided that you represent
and  warrant  to MCI that any name you  submit to MCI  and/or  the  domain  name
authority for  registration  and all  intellectual  property  rights therein are
owned exclusively by you, or that you have all necessary rights to register such
name,  and you agree to  indemnify  MCI against all losses  incurred by MCI as a
result  of a breach of this  warranty.  MCI  shall  not be  responsible  for its
inability to register  any domain  name(s).  At your  request and expense,  MCI,
where permitted, shall also assist you in procuring equipment in connection with
your use of the Service.  The parties  shall enter into a separate  agreement to
govern the terms of any such procurement activity.

9. NONDISCLOSURE: As used in this Agreement, the term "Confidential Information"
shall mean any information of a party disclosed by one party to another pursuant
to this  Agreement  which is in written or other  tangible  form  (including  on
magnetic media) or by oral, visual or other means, which is or reasonably should
have been  understood  by the  recipient  (the  "Receiving  Party"),


                                     - 5 -
<PAGE>

because of legends or other  markings,  the  circumstances  of disclosure or the
nature of the information itself, to be proprietary and confidential,  including
without  limitation this Agreement itself.  Each party recognizes the importance
of the Confidential Information.  Accordingly, each party agrees as follows: (a)
The Receiving  Party agrees (i) to protect such  Confidential  Information  from
disclosure  to others,  using the same  degree of care used to  protect  its own
confidential  or  proprietary  information of like  importance,  but in any case
using no less than a reasonable  degree of care,  (ii) not to disclose except as
specifically  permitted  hereunder any of the  Confidential  Information  or any
information  derived  therefrom to any third person except to its Affiliates and
contractors under a  confidentiality  obligation to the Receiving Party which is
no less  restrictive than that contained  herein,  and (iii) not to make any use
whatsoever  at any time of such  Confidential  Information  except as  expressly
authorized in this Agreement. Any Affiliate, employee, agent or contractor given
access to any such  Confidential  Information  must have a  legitimate  "need to
know" and shall be  similarly  bound in writing.  Without  granting any right or
license,  the parties agree that the  foregoing  shall not apply with respect to
information  the Receiving  Party can document (i) is in or (through no improper
action or inaction by the Receiving  Party or any  affiliate,  agent or employee
thereof) enters the public domain,  or (ii) was in its possession or known by it
prior to receipt from the disclosing party, or (iii) was rightfully disclosed to
it by another person without restriction, or (iv) was developed independently by
it without use of the Confidential Information. (b) Immediately upon termination
of this Agreement, the Receiving Party will return or, at the disclosing party's
direction,  destroy and certify the destruction of all Confidential  Information
and all documents and media containing any such Confidential Information and all
copies  and  extracts  thereof.  (c)  Either  party  may  disclose  the  other's
Confidential   Information  as  required  by  law.  (d)  Each  Receiving   Party
acknowledges  and  agrees  that due  tothe  unique  nature  of the  Confidential
Information,  there  can be no  adequate  remedy  at law for any  breach  of the
obligations  hereunder,  that any such breach will allow the Receiving  Party or
third parties to unfairly compete with the disclosing  party, and will result in
irreparable harm to the disclosing party and therefore that upon any such breach
or any threat  thereof,  the  disclosing  party shall be entitled to appropriate
equitable relief in addition to whatever remedies it might have at law and under
this Agreement.

10.  MISCELLANEOUS:  All notices  required  or  permitted  hereunder  must be in
writing,  delivered  personally or by U.S.  mail,  facsimile or electronic  mail
(followed by hard copy, in the case of fax or email) to the respective signatory
and notice  addresses set forth on the Cover Sheet,  or such other person and/or
address as a party may  notify the other from time to time,  and shall be deemed
effective upon receipt.  Any dispute  relating to this Agreement which cannot be
resolved by  negotiation  shall be settled by binding  arbitration in accordance
with  the  J.A.M.S./ENDISPUTE   Arbitration  Rules  and  Procedures  ("Endispute
Rules"), as amended by this Agreement.  The costs of arbitration shall be shared
equally by the


                                     - 6 -
<PAGE>

parties unless the arbitration award provides  otherwise.  Each party shall bear
the cost of  preparing  and  presenting  its case.  The  parties  agree that the
arbitrator's  authority to grant  relief  shall be subject to the United  States
Arbitration  Act,  9  U.S.C.  1-16  et seq.  ("USAA"),  the  provisions  of this
Agreement,  and the  ABA-AAA  Code  of  Ethics  for  Arbitrators  in  Commercial
Disputes. The arbitrator shall have no power to make any award that provides for
punitive or exemplary damages. The arbitrator's  decision shall follow the plain
meaning of the relevant documents, and shall be final and binding. The award may
be confirmed and enforced in any court of competent jurisdiction. All post-award
proceedings  shall be  governed  by the USAA.  If the  Customer  resells  access
provided  pursuant to this  Agreement,  Customer shall insure that its customers
abide by the terms of this Agreement  (including but not limited to MCI's Policy
against Spamming), and Customer shall not make any representations,  warranties,
or indemnities  inconsistent  with the terms of this  Agreement.  This Agreement
shall be binding upon and inure to the benefit of the  successors  and permitted
assigns of the parties hereto. Neither this Agreement, nor any of your rights or
obligations  herein shall be  transferable  or  assignable  by you without MCI's
prior  written  consent and any attempted  transfer or assignment  hereof not in
accordance  herewith  shall be null and void.  In the event that any  portion of
this Agreement is held to be unenforceable,  the unenforceable  portion shall be
construed in accordance with applicable law as nearly as possible to reflect the
original  intentions  of the parties and the remainder of the  provisions  shall
remain in full  force and  effect.  Either  party's  failure  to insist  upon or
enforce  strict  performance  of any  provision of this  Agreement  shall not be
construed as a waiver of any  provision or right.  Neither the course of conduct
between  parties nor trade  practice  shall act to modify any  provision of this
Agreement.  This Agreement shall be governed by and construed in accordance with
the laws of the  State of New  York,  without  regard  to its  conflicts  of law
provisions. Any cause of action you may have with respect to the Service must be
commenced  within one (1) year after the claim or cause of action arises or such
claim or cause of  action is  barred.  This  Agreement  constitutes  the  entire
agreement  between  you and MCI with  respect to the Service and can be modified
only in writing by the parties hereto.

11. USE OF MCI'S NAME/MARKS:  Neither party may use the other's name, trademark,
tradenames or other  proprietary  identifying  symbols without the prior written
approval of the other party. In Customer's use of the Service provided hereunder
and in the  provision  of services by  Customer to its own  customers,  Customer
shall not:  (i) use any  service  mark or trade mark either of MCI or any of its
affiliated  companies  or of which MCI or any of its  affiliated  companies is a
licensee,  or (ii) refer to MCI or any of its affiliated companies in connection
with any product, equipment,  offering, promotion, service or publication of the
Customer  or of a third  party on  behalf  of or with the  authorization  of the
Customer,  without the  written  approval  of MCI and its  pertinent  affiliated
company.  Customer  agrees  that:  (i) any use of MCI  mark(s)  by it is for the
benefit of MCI; (ii) all good will


                                     - 7 -
<PAGE>

resulting  therefrom  vests solely in MCI; and (iii)  Customer will neither have
nor make any claim in or to such mark(s).

         A violation of this Section shall  constitute a material breach of this
Agreement.  Any cure of such breach must be to MCI's  independent  satisfaction.
Notwithstanding  anything herein to the contrary,  MCI shall be entitled to seek
injunctive relief in enforcement of this Section.

[END OF ATTACHMENT 2]


                                     - 8 -
<PAGE>
                                  ATTACHMENT 3


internetMCI DEDICATED ACCESS RATES, CHARGES AND DISCOUNTS

I.       CONNECTION ORDERED PER THIS ATTACHMENT

         1.       Customer Name: SAVVIS Communications Corporation
         2.       Billing ID:  02049338
         3.       Circuit ID or PVC#:  itx96393-0001
         4.       Served Location (City, State): Santa Clara, CA
         5.       Served Location NPA-NXX:  408-496
         6.       Transmission Rate of Connection :  45Mbs
         7.       Access Method (Dedicated Access, Frame Relay): Dedicated
                  Access

II.      RATES AND CHARGES

         A.       LOCAL LEASED ACCESS LINE CHARGES.

                  Local Leased  Access Lines:  This  Agreement  incorporates  by
                  reference  the  terms  and   conditions  of  MCI's  filed  and
                  effective tariffs,  as amended from time to time in accordance
                  with law,  including all installations,  reconfiguration,  and
                  monthly  recurring  rates for any  applicable  local  channel,
                  central office connection,  and access  coordination  charges.
                  These  charges  are in  addition  to the  Network  Connections
                  Pricing set forth in Section II(B) below.  Access Pricing Plan
                  (APP)  discounts  having  the  same  term as the  Term of this
                  Agreement are  available,  subject to the terms and conditions
                  of the  applicable  APP.  The  Access  Pricing  Plan  must  be
                  separately  applied  for, and is not subject to, or a part of,
                  the terms and conditions of this Agreement.

         B.       NETWORK CONNECTIONS PRICING.

                           MCI   provides   Dedicated   Private   Line   Channel
                           connections  for  the   internetMCI   Full  Rate  DS3
                           service.  Additionally,  the charges  below apply for
                           the  connectivity of the Full Rate DS3 service to the
                           internetMCI network.

                  1.       Installation Charges:   *   for all connection speeds

                  2.       Reconfiguration Charges:   *   per occurrence


                                     - 9 -
* CONFIDENTIAL TREATMENT REQUESTED
<PAGE>

                  3.       Monthly  Recurring  Charges.  Check  box to  indicate
                           understanding of the rates.

                  [ ] Full Rate DS3 (ICB Only)
                  For Full Rate DS3,  the  Customer  will  receive  the  monthly
                  recurring rate that  corresponds to the average  monthly usage
                  tier (as  measured  in  Megabits  per  second)  at  which  the
                  Customer's   actual   monthly   usage   qualifies.   For   the
                  provisioning  of the Full Rate DS3 Service it is required that
                  the customer have a Digital Link 3100 DSU/CSU:


<TABLE>
<CAPTION>
                         Average Monthly Usage                            Monthly Recurring Charge
                         ---------------------                            ------------------------
<S>                                                                               <C>
                             0 - 1.5 Mbps                                             *
                          1.51 - 3.0 Mbps                                             *
                          3.01 - 4.5 Mbps                                             *
                          4.51 - 6.0 Mbps                                             *
                          6.01 - 10.0 Mbps                                            *
                         10.01 - 15.0 Mbps                                            *
                         15.01 - 45.0 Mbps                                            *
</TABLE>

                  The  Full  Rate  DS3  connection  charge  is  based  upon  the
                  Customer's  average  monthly  utilization  of the  connection.
                  Average  Monthly  Utilization is defined as the greater of the
                  average  traffic  into  or  out  of  the  port  connection  as
                  expressed  as a  percentage  of  the  total  capacity  of  the
                  connection.  Traffic is  measured  in five  minute  intervals,
                  which  are  averaged  monthly  to  arrive  at the  appropriate
                  monthly  usage tier.  The  Customer  will be  provided  with a
                  monthly utilization report upon request.

                  New MCI connections will be billed for the first two months of
                  service at the pricing  associated  with the lowest usage tier
                  set forth in the table.  Existing MCI Customers will be billed
                  for the one month at the pricing associated with their Average
                  Monthly  Utilization  during the  monthly  period  immediately
                  preceding the commencement of the Term of this Agreement.  The
                  Customer's  inbound  and  outbound  traffic  will be  measured
                  during  the  first  two  months,  and  the  Customer  will  be
                  reassigned  in the third month to the usage tier  commensurate
                  with their Average Monthly  Utilization for the prior usage of
                  two months past. At the end of any monthly  measurement period
                  in which the Customer's  Average  Monthly Usage falls below or
                  exceeds  the usage  associated  with its  assigned  tier,  the
                  Customer will be reassigned  to a new tier  commensurate  with
                  their Average Monthly Utilization.


                                     - 10 -
* CONFIDENTIAL TREATMENT REQUESTED
<PAGE>

                  For DS3  connectivity,  Customer will be  provisioned  through
                  MCI's ____ IP node. If necessary, Customer will be charged for
                  back hauling its DS3  connection  facility from the Customer's
                  MCI Point of Presence location to the nearest natural backhaul
                  BIPP node  termination  point in MCI's Internet network at the
                  per-mile  TDS 45 rates  set forth in MCI's  Tariff  FCC No. 1.
                  Such back-hauling charges are eligible for the discount as set
                  forth in Section II(C)(1) below.

                  4.       Price  Changes.  MCI reserves the right to change its
                           Network Connection pricing on 30-days advance notice.
                           If  any  such  price  change,  after  all  applicable
                           discounts  are applied,  results in a net decrease to
                           Customer's monthly charges, Customer will receive the
                           benefit of such decrease. If such price change, after
                           all  applicable  discounts are applied,  results in a
                           net increase to  Customer's  monthly  charges of more
                           than five percent (5%),  Customer may terminate  this
                           Agreement  without  further  liability,   other  than
                           payment of charges  incurred prior to the termination
                           date.   To  exercise  the  right  to  terminate   the
                           Agreement provided under this Section,  Customer must
                           provide  MCI with at least  thirty  (30)  days  prior
                           written notice, which notice must be delivered to MCI
                           within  thirty  (30) days of  Customer's  receipt  of
                           notice  of  the  applicable  price  increase.  Within
                           thirty (30) days of any termination of this Agreement
                           pursuant to this Section, Customer shall repay to MCI
                           any  credits  that MCI may have  granted to  Customer
                           hereunder.

                  5.       Partial Billing.  Customers will be billed a prorated
                           share of the above charges for connections installed,
                           terminated,  or  reconfigured  during the course of a
                           monthly billing cycle.

         C.       FIXED TERM DISCOUNTS

                  1.       Options.  Customer  will receive  discounts off MCI's
                           month-to-month   rates   by   committing   individual
                           connections  to 1, 2, 3, 4, or 5 year service  terms.
                           Fixed term  discounts  are  applied on the  effective
                           charges after applying all utilization and connection
                           cost-based  discounts  and  surcharges.   Fixed  term
                           discounts shall not apply to Local Leased Access Line
                           Charges.  If no term is selected below,  the Customer
                           will be  placed  on a  month-to-month  term  and will
                           receive no discounts.


                           Select One         Term (in Years)        Discount
                               [ ]                   0                  0%


                                     - 11 -
<PAGE>

                               [ ]                   1                  15%
                               [ ]                   2                  17%
                               [ ]                   3                  20%
                               [ ]                   4                  22%
                               [x]                   5                  25%


                  2.       Early  Termination.  If the Customer's  connection is
                           disconnected  prior to the end of the committed Term,
                           Customer will pay an early  termination  charge equal
                           to fifty  percent (50%) of their  subscribed  monthly
                           connection  charges,  including  applicable  backhaul
                           charges, multiplied by the number of months remaining
                           in the Term. In addition,  within thirty (30) days of
                           any  termination  of this  Agreement  for which early
                           termination  charges are  applicable,  Customer shall
                           repay to MCI any credits that MCI may have granted to
                           Customer  hereunder.  Early termination charges shall
                           apply in all cases except the following:

                  -        If the Customer  terminates its connection under this
                           Attachment due to a breach of the contract by MCI;

                  -        If MCI must disconnect service to the Customer due to
                           any  reason  not  resulting  from  a  breach  of  the
                           Agreement by Customer;

                  -        If Customer  terminates pursuant to Section II.B.4 of
                           this Attachment 3, following a rate increase

                  3.       Upgrades/Downgrades.  Customer  may change to a fixed
                           rate of DS3  connectivity  utilizing the  internetMCI
                           Fixed Rate DS3 service at any time during the term of
                           this  Agreement.   If  Customer  disconnects  service
                           within six (6) months of changing  the DS3  interface
                           of Customer's connection,  any applicable termination
                           charge  will  be  based  on the  DS3  interface  used
                           immediately prior to such downgrade.  To exercise its
                           right under this provision, the Customer must provide
                           written  notice to MCI at least  thirty  (30) days in
                           advance, in the manner specified in Attachment 2.


[END OF ATTACHMENT 3]


                                     - 12 -
<PAGE>

                                  ATTACHMENT 4

                MCI TELECOMMUNICATIONS CORPORATION AND AFFILIATES
                          POLICY AGAINST SPAMMING (1)


MCI  and  its  affiliates   provide  to  business  and  consumer  users  several
information  technology  related  services,  including  such service as Internet
access,  various  electronic mail (email) packages and services,  World Wide Web
website hosting arrangements, and other online and Internet-related services.

It is contrary to MCI policy for any user of any of these  services to effect or
participate in any of the following activities through an MCI-provided service:

1. To post ten (10) or more  messages  similar  in  content  to  Usenet or other
newsgroups, forums, email mailing lists or other similar groups or lists:

2. To post to any Usenet or other newsgroup,  forum, email mailing list or other
similar group or list articles  which are off-topic  according to the charter or
other owner-published FAQ or description of the group or list;

3. To send  unsolicited  emailings to more than twenty-five (25) email users, if
such unsolicited emailings could reasonably be expected to provoke complaints.

4. To falsify user information  provided to MCI or to other users of the service
in connection with use of an MCI service.

5. To engage in any of the foregoing  activities by using the service of another
provider,  but channeling such activities through an MCI account,  remailer,  or
otherwise  through  an MCI  service or using an MCI  account  as a maildrop  for
responses or otherwise using the services of another provider for the purpose of
facilitating  the foregoing  activities if such use of anothers  party's service
could reasonably be expected to adversely affect an MCI service;

MCI considers the above practices to constitute  abuse of our service and of the
recipients of such  unsolicited  mailings  and/or  postings,  who often bear the
expense. Therefore, these practices are prohibited by MCI's terms and conditions
of  service.

--------
(1) This policy is included in this  Agreement  for the  Customer's  information
purposes  and  constitutes  the policy as its exists at the time of execution of
this Agreement.  This policy is subject to change upon public posting by MCI and
without the agreement of the Customer.



                                     - 13 -
<PAGE>

Engaging in one or more of these  practices  will result in  termination  of the
offender's account and/or access to MCI services.

In addition,  MCI reserves the right,  where  feasible,  to implement  technical
mechanisms  which block  multiple  postings as  described  above before they are
forwarded or otherwise sent to their intended recipients.

This policy  addresses only the kinds of network abuse  specifically  enumerated
above.  In addition to these  activities,  MCI's terms and conditions of service
also prohibit other forms of abuse such as harassment and the posting of illegal
or  unlawful  materials,  and MCI will  respond as  appropriate  to these  other
activities as well.

Nothing  contained in this policy  shall be construed to limit MCI's  actions or
remedies in any way with  respect to any of the  foregoing  activities,  and MCI
reserves  the  right  to  take  any  and  all  additional  actions  it may  deem
appropriate with respect to such activities, including without limitation taking
action to recover the costs and expenses of  identifying  offenders and removing
them from the MCI service, and levying cancellation charges to cover MCI's costs
in the event of disconnection of dedicated access for the causes outlined above.
In addition,  MCI reserves at all times all rights and remedies  available to it
with respect to such activities at law or in equity.

If you have any  questions  regarding  this Policy on Spamming,  please  contact
policies@internetmci.com.

[END OF ATTACHMENT 4]


                                     - 14 -
<PAGE>

                                  ATTACHMENT 5

                internetMCI DEDICATED ACCESS SERVICE OBJECTIVES


1.       SCOPE OF COVERAGE.

The  internetMCI  service  objectives  apply only to service  outages related to
Customer's access port, the router to which the access port is connected, and to
any network transport on MCI's Internet backbone (the "internetMCI  BIPP").  The
scope of  coverage  excludes,  without  limitation,  all other  public  Internet
backbones and networks,  any server on the Internet,  customer premise equipment
("CPE") and local  access and  backhaul  facilities  from the  customer to their
assigned router, which is the point of demarcation for purposes of these service
objectives,  and packet delivery to or from the Internet,  including Frame Relay
access.

2.       PERFORMANCE OBJECTIVE

MCI will use diligent  efforts to ensure that eligible  trouble tickets isolated
to exist on the  internetMCI  BIPP will be resolved  in ninety  (90)  minutes or
less.  Failure to meet this  objective may make Customer  eligible for a Service
credit to be applied to  Customer's  next  regularly-scheduled  invoice  for MCI
Dedicated  Internet  Access  Service.  Processing of any Customer credit will be
done by the  appropriate  MCI account sales team,  who will apply the applicable
credit parameters contained herein.

3.       MEASUREMENT OF THE OBJECTIVE

Mean-Time-To-Restore  ("MTTR") is the  measurement  that will be used to measure
the performance  objective.  MTTR will be calculated on a per occurrence  basis,
starting  with the opening by  Customer of a trouble  ticket and ending when MCI
makes its first attempt to notify Customer of restoration of the Service.

One of three levels of trouble ticket  severity will be assigned to each ticket,
depending on the impact of the service issue to Customer's business:

o    Severity  1 - System  down -  Cannot  PING to any  host -  complete  access
     router, access port failure or BIPP logical routing error;
o    Severity  2 -  System  partially  down - Can PING to some  hosts -  partial
     access router or port failure,
o    Severity  4 - Informational - CPE work or other.

Only trouble  tickets that are  classified  by MCI as Severity 1 conditions  may
make Customer eligible for Service credits under this Agreement.



                                     - 15 -
<PAGE>

4.       CUSTOMER REPORTING PROCEDURES

At the time  Customer  believes  that they are  experiencing  an  out-of-service
condition,  a trouble ticket should be opened be calling the designated internet
Network  Operations  Center  ("iNOC")  trouble  line.  Once the  ticket has been
opened, the appropriate MCI organizations  will initiate  diagnostic testing and
trouble  isolation  activities  to determine if the  difficulty  is related more
closely to access, the local loop, backhaul to an internetMCI BIPP gateway or by
CPE.  If the  trouble is  diagnosed  as one which may be within the  internetMCI
BIPP,  responsibility and management of that ticket will be assumed by the iNOC.
If a determination is made that the cause of the customer's  service outage is a
problem related to the internetMCI  BIPP (e.g.,  logical routing) and the outage
duration  exceeds the MTTR  objective,  Customer  may be eligible  for a Service
credit.

Responsibility  for trouble ticket  initiation rests solely with Customer,  with
follow up to be the joint  responsibility  of Customer and the MCI account sales
team.  No service  credits  can be extended  for any  customer  outage  unless a
trouble  ticket has been opened with the MCI iNOC.  In addition,  Customer  must
request a credit from the MCI account sales team.

5.       OTHER EXCLUSIONS

As provided in Section 1, the service level  objectives  contained  herein cover
only those Customer  outages which occur on the  internetMCI  BIPP,  using MCI's
border router as the point of demarcation.  The service level  objectives  apply
only to  out-of-service  conditions  and do not apply to service  interruptions,
degradation  of  service,   packet  loss,  or  sub-optimal  performance  on  the
internetMCI  BIPP Measurement of outages will be as provided in Section 3. In no
case will PING Tests  performed by customers  be  recognized  by MCI as a valid,
measurable criterion for outage determination for the purposes of establishing a
Service credit hereunder.

The  service  level  objectives  contained  herein  apply  only  to  internetMCI
Dedicated  Access  customers.  They do not apply to Internet  Service  Providers
("ISPs") who have a "peering" relationship with MCI nor do they apply to Concert
InternetPlus Service. For the purpose of this Agreement, "peering" is defined as
the exchange of customer  packets at the network  level  between an ISP and MCI,
either at a public  interconnection  point (NAP), or through a direct connection
with MCI.

Under no circumstances will credits be given for outages involving:

     (a)  trouble  tickets  associated  with  new  installations  (i.e.,  before
          service acceptance by Customer);
     (b)  trouble tickets erroneously opened by the Customer;



                                     - 16 -
<PAGE>

     (c)  outages  arising from required  Customer  circuit release for testing;
          and
     (d)  trouble  tickets  opened by Customer for circuit  monitoring  purposes
          only.

6.       CUSTOMER'S REMEDY FOR MCI'S FAILURE TO MEET SERVICE OBJECTIVE

Customer may be entitled to receive  certain  credits for covered outages of the
Service  which  are the fault of MCI.  To be  eligible  for a credit  hereunder,
Customer must follow the trouble  reporting  procedures  established  above, the
covered  outage must exceed the MTTR  objectives,  and  Customer  must request a
credit from the MCI  account  sales  team.  No credit  will be given  unless the
actual MTTR for an eligible  Severity 1 trouble ticket exceeds  ninety-one  (91)
minutes.  Customer's Service credit will be a prorated amount dependent upon the
length of the service outage and Customer's Monthly Recurring Charge ("MRC") for
the Service, as follows:

Length of Service Outage                  Amount of Credit

0 to 90 minutes                           none

91 minutes to 5 hours                     1 day's prorated portion of MRC

more than 5 hours                         3 days' prorated portion of MRC

Customer may receive no more than one such credit for the twenty-four  (24) hour
period  beginning with the opening of the trouble ticket,  even if more than one
outage occurs during that period. Customer's total credit in any month shall not
exceed Customer's total MRC for the Service for the month in which the credit is
to be applied.  Residual  credits may not be carried over to subsequent  months.
THIS CREDIT SHALL BE CUSTOMER'S SOLE AND EXCLUSIVE REMEDY FOR ANY SERVICE OUTAGE
OR ANY MCI FAILURE TO MEET THE SERVICE OBJECTIVES.


[END OF ATTACHMENT 5]

             SCHEDULE PURSUANT TO RULE 601(a) UNDER REGULATION S-K

As permitted by Rule 601(a) under  Regulation S-K under the  Securities  Act, we
have omitted the following agreements from this filing:

1)   internetMCI  Dedicated Access Agreement,  effective April 16, 1998, between
     SAVVIS  Communications  Corporation and networkMCI,  Inc. (served location:
     Atlanta, Georgia)

2)   internetMCI  Dedicated Access Agreement,  effective April 16, 1998, between
     SAVVIS  Communications  Corporation and networkMCI,  Inc. (served location:
     New York, New York)

3)   internetMCI  Dedicated Access Agreement,  effective April 16, 1998, between
     SAVVIS  Communications  Corporation and networkMCI,  Inc. (served location:
     Dallas, Texas)

4)   internetMCI  Dedicated Access Agreement,  effective April 16, 1998, between
     SAVVIS  Communications  Corporation and networkMCI,  Inc. (served location:
     St. Louis, Missouri)

5)   internetMCI  Dedicated Access Agreement,  effective April 16, 1998, between
     SAVVIS  Communications  Corporation and networkMCI,  Inc. (served location:
     Los Angelos, California)

6)   internetMCI  Dedicated  Access  Agreement,  effective  September  22, 1998,
     between SAVVIS  Communications  Corporation  and networkMCI,  Inc.  (served
     location: Chicago, Illinois)

                                     - 17 -