Document:

MCI WORLDCOM

                        AGREEMENT ("AGREEMENT") REGARDING
                        SECURITY DEPOSIT AND DISCLOSURES

1.       The service contract (the "Service Agreement") between ("Customer") and
         WorldCom, Inc. ("WorldCom") stipulated and agreed to an estimated
         monthly service usage ("EMU") of **********. Based on the agreed EMU,
         WorldCom agreed to grant a total credit limit of twice the EMU dollars
         to avoid future over-limit violations and to allow Customer limited
         variation from the EMU.

2.       Usage limitations are assigned to each WorldCom commercial account
         based on an extensive credit investigation and evaluation of each
         customer's financial soundness and creditworthiness. This procedure is
         made possible through credit documents sent to WorldCom's credit
         department (the "Credit Department") at the time for the initial
         application for service. If Customer is desirous of a credit limit in
         excess of the present approved limit, Customer should submit, as son as
         possible, a current financial statement, profit and loss statement,
         last three years corporate tax returns and other financial information
         that will assist the Credit Department in a new credit evaluation.
         Please state in written form on Customer letterhead, signed by an
         authorized corporate officer, the amount of credit limit increase that
         Customer is requesting. Customer's request will be given priority
         status upon receipt. Please direct all Deposit payments, credit limit
         increase requests, and new financial information to:

                                    WorldCom
                               Mail Drop 5.3-527E
                             6929 N. Lakewood Avenue
                                 Tulsa, OK 74117

3.       WorldCom is in receipt of deposit ("Deposit") in the amount of
         **********, representing two (2) times Customer's EMU. The Deposit will
         be held, as security for any and all amounts owed, now or in the
         future, by Customer to WorldCom.

4.       The Deposit will be held for a minimum of *** (**) months or ***
         (**) billing cycles, whichever terminates later. The Company reserves
         the right to apply the Deposit to satisfy delinquent invoices incurred
         on Customer's account.

5.       Payment terms shall be net ** days from the date of invoice. Customer's
         account may not exceed the amount of the Deposit at any time. If
         Customer's credit limit is exceeded at an y time during the term of the
         Agreement, Customer's account must be paid down to * (*) of
         the Deposit amount immediately when requested by WorldCom. Failure to
         meet the above conditions of this Agreement without WorldCom's approval
         will result in immediate termination of service.

6.       To the extent permitted by applicable state law, WorldCom may, in its
         sole discretion, request additional funds be provided to increase the
         amount of the Deposit, in the event that the actual usage amount
         exceeds the EMU, or if WorldCom reasonably requires under the
         circumstances. WorldCom reserves the right to hold and apply Customer's
         deposit if Customer does not perform according to the terms and
         conditions of the Service Agreement.

                       *CONFIDENTIAL TREATMENT REQUESTED*

                            MATERIAL FILED SEPARATELY
<PAGE>

MCI WORLDCOM

7.       It is further understood that should any credits become due from
         WorldCom to Customer for any billing errors, resolution of such errors
         will be coordinated with Customer. However, these credits, if any, will
         not affect the above agreed payment arrangement.

8.       Upon receipt the Deposit will be held in an interest-bearing account
         for a minimum of ** (**) months. After the ** (**) month
         period, WorldCom will review Customer's financial position as well as
         its WorldCom payment history. If circumstances warrant, the deposit and
         all accrued interest will be refunded.

9.       Interest on the funds represented by the Deposit will be paid as
         required on a state by state basis, and at a rate set by each
         individual state's Public Utility Commission or other applicable
         governmental agency or entity. Interest is paid on a simple interest
         basis using 365 days per year. Interest of **% will be paid when the
         Deposit is no longer required.

10.      To the extent permitted by applicable state law, funds will be held by
         WorldCom's executive offices in Clinton, Mississippi. Should Customer
         have any questions regarding the Deposit funds, please contact the
         assigned WorldCom Account Executive or call the nearest WorldCom sales
         office.

11.      At WorldCom's sole and exclusive option, the Deposit may be refunded or
         credited to the Customer at, or any time prior to, termination of
         service. In that event, the Customer may elect to apply the Deposit to
         future invoices or receive a payment of the Deposit amount. If any
         balance is outstanding on the Customer's account at the time of
         cancellation, WorldCom reserves the sole and exclusive right to apply
         the Customer's Deposit and accumulated interest against the Customer's
         unpaid balance.

                       *CONFIDENTIAL TREATMENT REQUESTED*

                            MATERIAL FILED SEPARATELY
WorldCom, Inc.

By: /s/ Todd Narwid
    -------------------
Name:    Todd Narwid
Title:   Director
Date:    July 19, 2000

Received, Understood and Agreed:

Customer:  Inter-Call-Net Teleservices, Inc.

By:  /s/ Paul Cifaldi
    ---------------------
Name:    Paul Cifaldi
Title:   COO
Date:    July 19, 2000

<PAGE>

                                  MCI Worldcom

          MCI WorldCom On-Net Service Agreement and Attachments A - G

                       *CONFIDENTIAL TREATMENT REQUESTED*

                            MATERIAL FILED SEPARATELYBTI TERM PLAN AGREEMENT

As of this 20th day of May, 2000, Intercallnet Teleservices
["Customer"] agrees to commit its long distance telephone usage to BTI as
follows:

BTI Product      **
            ---------------

Commitment    **      continuous months/ years [circle one].
          -----------

In consideration of this commitment, the initial rates under this Term Plan
Agreement ["Agreement"] are listed below, and will be reflected commencing the
first billing statement subsequent to input by BTI [Customer must initial Term
and rates]:

            TERM         SWITCHED ACCESS        DEDICATED ACCESS
              [All Minutes]          [All Minutes]

Initials    Term         Initials       Rates       Initials         Rates

____     1 YEAR TERM       _____     $_*__$_*__      ______        $____$____

____     2 YEAR TERM       _____     $____$____      ______        $____$____

____     3 YEAR TERM       _____     $____$____      ______        $____$____

           Installation Charge  $____      Installation Charge  $____
           [Must be completed]             [Must be completed]

           Months Recurring     $____      Months Recurring     $____
            Charge                          Charge
          [Must be completed]             [Must be completed]

Customer agrees to pay BTI the following if Customer terminates this Agreement
prior to expiration of the Term:

1.       If committed to a switched access service:
         ** per month for all months remaining in the Term

2.       If committed to a dedicated access service:
         ** per month for all months remaining in the Term

3.       All waived installation charges, monthly access charges and special
         promotional credits given [as itemized on the Account Customer
         Information Form LOA]

This Agreement is subject to the rules and regulations of BTI's state and
federal tariffs and the Terms and Conditions on the reverse side of this form.
Rates are subject to change upon approval by the proper regulatory authority.
This Agreement may be terminated without penalty any time within the first 90
days of signing. This 90-day guarantee applies only to this Initial Term Plan
signed with BTI and not subsequent Term Plan Agreements.

BTI REPRESENTATIVE                            CUSTOMER

BY: /s/  Illegible                            BY:  /s/ Paul Cifaldi
  ---------------------------------              ---------------------------

PRINT NAME: /s/ Illegible                     PRINT NAME:  Paul Cifaldi
          -------------------------                      -------------------

                       *CONFIDENTIAL TREATMENT REQUESTED*

                            MATERIAL FILED SEPARATELY
<PAGE>

Scope: business Telecom, In. ("BTI or "Company"), undertakes to provide
Interstate and International telecommunications service (any and/or all services
offered by the Company) ("services") to the Customer (signatory on account and
any individual/legal entity authorized to use Service) in accordance with the
terms and conditions set forth herein. Interstate Service is provided only in
conjunction with interstate Service. Service is not part of a joint undertaking
with any other entity providing services. The Customer may not transfer or
assign the use of Service provided until canceled by the Company or the
Customer. Equipment and Facilities: All service is subject to the availability
of suitable facilities. The Company reserves the right to discontinue
furnishing, or limit the use of service when necessitated by conditions beyond
its control: or when the customer is using service in violation of the law or
the provisions contained herein. The customer shall have exclusive
responsibility and liability for the installation, maintenance and operation of
Customer- provided station equipment at the Customer's premises for use in
connection with service. The customer must obtain an adequate number of access
lines for Toll Free Services to meet expected demand. Use of service: The
company's service may be used for any lawful purpose consistent with the
transmission and switching parameters of the facilities utilized in the
provision of service. The use of the Company's Service to make calls which might
reasonably be expected to frighten, abuse, torment, or harass another or in such
a way as to unreasonably interfere with use by others is prohibited. The use of
the Company's service without payment for service or attempting to avoid payment
for Service by fraudulent means or devices. Schemes, false or invalid numbers.
Or false calling or credit cards is prohibited: including, but not limited to
rearranging. Tampering with. Or making connections not authorized by the company
to any service component used to furnish service, or using toll Free Service
with the intent of gaining access to a Customer's outbound calling capabilities
on a n unauthorized basis. Unauthorized use does not relieve the Customer of
payment for Service and the Company reserves the right to analyze any and all
information at its disposal. Including credit surveys call detail records and
any other information to prove unauthorized use. The charges for unauthorized or
fraudulent use are in addition to any remedies allowed for under civil or
criminal proceedings and will be the company's highest usage charges applied to
network usage and attempted network usage, whether or not a terminating
connection was achieved, plus all costs incurred by the Company to detect,
discover, observe, investigate, analyze examine, and locate the party
responsible for unauthorized or fraudulent use.
 Interruptions: Credit allowance for the interruption of service which is not
due to the Company's testing or adjusting, negligence of the Customer, or to the
failure of channels or equipment provided by the Customer, are subject to the
general liability provisions set forth herein. It shall be the obligation to the
customer to notify the company immediately of any interruption in service for
which a credit allowance is desired. For purposes of credit computation. Every
month shall be considered to have 720 hours. No credit shall be allowed for an
interruption of a continuous duration of less than two hours. The Customer shall
be credited for an interruption two hours or more at the rate of 1/720th of the
monthly charge for the facilities affected for each hour that the interruption
continues. This credit applies only to monthly recurring charges, and does not
affect any charges based upon Customer's actual usage of company's service.
Limitations of Liability: Except as otherwise stated herein the liability of the
company for damages arising out of either: (1) the furnishing of its service
including but not limited to mistakes omissions, interruptions, delays, or
errors, or other defects, representations or use of service or (2) the failure
to furnish its service, whether caused by acts or omission shall be limited to
the extension of allowances for interruptions in Service as set forth herein.
The Company shall not be consequential, exemplary or punitive damages, including
but not limited to loss of revenue or profits for any reason whatsoever,
including, but not limited to any at or omission. Failure to perform delay.
Interruption failure to provide any service or any failure in or breakdown of
facilities associated with the service.
         The liability of the Company for errors in billing that result in
overpayment by the Customer shall be limited to a credit equal to the dollar
amount erroneously billed or, in the event that payment has been made and
service has been discontinued to a refund of the amount erroneously billed. Any
claim of whatever nature against the Company shall be deemed conclusively to
have been waived unless presented in writing to the company within thirty (30)
days after the date of the occurrence that gave rise to the claim. Upon request.
BTI shall provide copies of Customer invoices dating back to the three (3) most
recent billing cycles at no expense to Customer ("Invoices"). However, BTI
reserves the right to charge Customer for all expenses related to providing
copies of invoices which exceed this three (3) billing cycle limit including but
not limited to labor and materials a rising from reproduction of invoices,
         The Company shall be indemnified defended and held harmless by the
customer or end user from and against any and all claims losses demands suits,
expenses, or other action or any liability whatsoever, including attorney's
fees. Whether suffered made, insulted or asserted by the customer or by any
other party for any personal injury to or death of any person or persons and for
any loss damage or destruction of any property including environmental
contamination whether owned by the customer or by any other party. Caused or
claimed to have been caused directly or indirectly by the installation operation
failure to operate maintenance presence condition location use or removal of any
company or customer equipment or facilities or service provided by the company.
         The Company assumes no responsibility for the availability or
performance of any systems or related facilities under the control of other
entitles or for other facilities provided by other entities used for service to
the Customer, even if the Company has acted as the Customer's agent in arranging
for such facilities or service.

<PAGE>

         The Company shall not be liable for any claims for loss or damages
involving: (1) any delay or failure of performance or equipment due to causes
beyond the Company's control, including but not limited to, acts of God, fires,
floods, earthquakes, hurricanes, or other catastrophes, national emergencies,
insurrections, riots, wars or other civil commotions, strikes, lockouts, work
stoppages or other labor difficulties. Criminal actions taken against the
Company, unavailability, failure or malfunction of equipment or facilities
provided by the Customer or third parties, and any law, order, regulation or
other action of any governing authority or agency thereof; (2) any unlawful or
unauthorized use of the company's facilities and Service; (3) libel, slander,
invasion of privacy or infringement of trademarks, patents, trade secrets, or
copyrights arising from or in connection with the transmission of communications
by means of Company provided facilities or Service; or by manes of the
combination of Company provided facilities or Service with Customer provided
facilities or service; (4) breach in the privacy or security of communications
transmitted over the Company's facilities; (5)changes in any of the facilities,
operations or procedures of the Company that render any equipment, facilities or
service provided by the Customer obsolete, or require modification or alteration
of such equipment, facilities or service, or other wise affect their use or
performance, except where reasonable notice is required by the Company and is
not provided to the Customer; (6) defacement of or damage to Customer premises
resulting from the furnishing of Service or equipment on such premises or the
installation or removal thereof; (7) any intentional, wrongful act of a Company
employee when such act is not within the scope of the employee's
responsibilities for the Company and/or is not authorized by the Company; (8)
any representations made by Company employees that do not comport, or that are
inconsistent with the provisions herein; (9) any act or omission in connection
with the provision of 911, E911, or similar service; (10) any noncompletion of
calls due to network busy conditions; or (11) any calls not actually attempted
to be completed during any period that Service is unavailable.

Cancellation by Company: Without incurring liability, Company may refuse or
discontinue Service to Customer or may withhold the provision of ordered or
contracted Service; (1) for nonpayment of any sum due Company for more than
thirty days after issuance of the bill for the amount due; (2) for violation of
any of the provisions contained herein; (3) for violation of any law, rule,
regulation or policy of any governing authority having jurisdiction over
Company's Service; or (4) by reason of any order or decision of a court, public
service commission or federal regulatory body or other governing authority
prohibiting Company from furnishing its Service. Cancellation of interstate
service will result in cancellation of intrastate and international service.
Cancellation by customer: Service shall be canceled by Company promptly upon
receipt of a cancellation request from Customer in writing and received 30 days
prior to cancellation. Upon cancellation, a final bill will be prepared and the
Customer shall be liable for all recurring charges prior to proper notice if a
change in presubscribed carrier is initialed by the Customer. Additional
cancellation terms and conditions may apply.

Payment for Service: The Customer is responsible for the payment of bills to the
Company or any duly authorized agent for Service rendered by the Company,
including payment for calls or Service originated at the Customer's number(s);
originated by the use of a calling card or by the use of accompany-assigned
special billing number and incurred at the specific request of the Customer; and
for all associated installation charges, special charges and surcharges. For the
purposes of billing, the start of Service date will e the date on which the
Customer is given his Customer identification number. Customer will be rendered
a bill each month for Service that contains rates and charges, as set forth
herein, for all usage of Service by Customer. Bills are payable upon receipt and
are due no later than the date indicated on the bill. If an attorney or
collection agency is required to collect the bill for Service, the reasonable
cost for this assistance shall be paid by the Customer.

Rates and Charges: Call timing is determined by industry standards, and usage
charges for mileage-sensitive Service are based on airline distance using
industry standard calculations form NECA FC Tariff No. 4. The Company reserves
the right to collect a deposit or advance payment in an amount up to the maximum
rate allowed by law will apply to payments received after the due date. A charge
up to the maximum allowed try law will apply to checks or drafts presented for
payment which are returned. Customer is responsible for payment f all excise,
sales. Use or similar taxes, which may be leveled on the service by any local,
state or federal government. Including assessments for government-Initialed
social objectives, Customer will be billed recurring monthly fees assessed by
authorized regulatory agencies. The company reserves the right to bill, without
limitation, for any service provided which was billed in an amount less than the
prevailing rate for service. Rates and charges, including those under Term Plan
Agreements are subject to change upon not less than one day's notice to customer
via U.S. Mail, bill insert, insert, newspaper publication or any other means
available to the company. Governing law: This Agreement shall be governed by and
construed in accordance with the laws of the state of North Carolina without
regard to choice of law principles and the venue of any legal action by either
party concerning or in any way pertaining to this Agreement shall be in Wake
County, North Carolina: and the State of North Carolina shall have personal
jurisdiction over the parties for all matters a rising from or related to this
Agreement. Notice: Notice y Customer served upon Company shall be by First Class
U.S. Mail addressed to: Business Telecom. Inc. 4300 Six Forks Road. Suite 500
Raleigh North Carolina 27609 ATTN: Customer Support.

Printed name Paul Cifaldi   Customer's Signature /s/ Paul Cifaldi  Date: 5/20/00
            ----------------                    --------------     -------------

<PAGE>

Of this 13 day of APRIL, 2000              , CMS  Intercallnet Telesrvices, Inc.
       ----                  --------------       ------------------------------
["Customer"] agrees to commit its long distance telephone usage to BTI as
follows:

BTI Product:  NSO SPECIAL DEDICATED (215)
              ------------------------------------

Commitment:      *       continuous         [  ] Months      [  ]    Years
          ---------------

In consideration of this commitment, the initial rates under this Term Plan
Agreement ["Agreement"] are listed below, and will be reflected commending the
first billing statement subsequent to input by BTI [Customer must initial Term
and Rates]

    TERMS                   SWITCHED ACCESS              DEDICATED ACCESS
                             [All Minutes]                 [All Minutes]

Initials    Term    Initials         Rates        Initials       Rates
                             Interstate/intrastate        Interstate/Intrastate

            * year            $          $                  $   *     $    *
--------    ------  --------   ---------- --------- ------   ---------  -------

     Installation Charges  $               Installation Charges  $    *
     [Must be completed]   -----------     [Must be completed]   ------------

As per NSO #: 40465     Month Recurring $         Month Recurring $    *
              -----     Charge           -------- Charge           ---------

See Exhibit A          [must be completed]        [must be completed]

Customer agrees to pay BTI the following if Customer terminates this Agreement
prior to the expiration of the Term:

                       *CONFIDENTIAL TREATMENT REQUESTED

         1.       If committed to a switched access service:

                        SEE EXHIBIT A

         2.       If committed to a dedicated access service:

                        SEE EXHIBIT A

         3.       All waived installation charges, monthly access charges and
                  special promotional credits given [as itemized on the Account
                  Customer information Form LOA]

Customer acknowledges by signing herein that this Agreement is subject to the
rules and regulations of BTI's state and federal tariffs and the Terms and
Conditions on the reverse side of this form. Rates are subject to change upon
approval by the proper regulatory authority. Customer must notify BTI in writing
30days in advance of the end of the initial Term f this Agreement or the end of
any renewal Term of this Agreement then in effect to cancel or change this
Agreement. If such notification is not received, this Agreement is automatically
renewed for the same Term upon the same terms and conditions. This Agreement may
be terminated without penalty any time within the first 90 days of signing. This
90 - day guarantee applies only to this initial Term Plan signed with BTI and
not subsequent Agreements.

BTI REPRESENTATIVE                        CUSTOMER

Signature: /s/ Rin Rivchin                Signature: /s/ Paul Cifaldi
          ------------------------                  -----------------------
Print Name:  Ron Rivchin                  Print Name:  Paul Cifaldi
            ---------------------                    ----------------------
Sales ID:    3327                         Title:
         ------------------------               ---------------------------

Date:       4/13/2000                     Date:  4/27/00
      ---------------------------              ----------------------------

<PAGE>

Exhibit A to Term Plan Agreement Between Business Telecom, Inc. and CMS

In consideration for the rates for dedicated access service set forth in the
Term Plan Agreement to which this Exhibit is attached, Customer agrees to
generate Revenue (as defined below) of at least $ *** monthly. In the event
Customer does not generate Revenue in an amount equal to or more than $***
monthly, Customer hereby agrees to pay to BTI upon demand the deficiency between
*** and the amount of Revenue actually generated by Customer in such a
month Notwithstanding the foregoing, Customer shall not be required to generate
the *** monthly minimum Revenue until the second quarter of the initial
term of the Term Plan Agreement. BTI agrees to reimburse Customer for all T-1
installation charges incurred once the minimum monthly revenue of *** is
obtained. For purposes of this Exhibit, "Revenue" shall mean only charges for
current usage and shall exclude, without limitation, taxes, tax-like surcharges,
installation fees, FCC charges, federal and state imposed fees, loop charges and
monthly recurring and non-recurring fees.

BTI REPRESENTATIVE                        CUSTOMER

Signature: /s/ Rin Rivchin                Signature: /s/ Paul Cifaldi
          ------------------------                  -----------------------
Print Name:  Ron Rivchin                  Print Name:  Paul Cifaldi
            ---------------------                    ----------------------
Sales ID:    3327                         Title:
         ------------------------               ---------------------------

Date:       4/27/2000                     Date:  4/27/00
      ---------------------------              ----------------------------

                       *CONFIDENTIAL TREATMENT REQUESTED*

                            MATERIAL FILED SEPARATELY

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