Document:

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EXHIBIT  10.29

          THE TERMS OF THIS ADDENDUM ARE PROPRIETARY TO OPTICOM AND ARE
     SUBJECT TO A CONFIDENTIALITY AGREEMENT SET FORTH IN SECTION 6 OF THIS
                                    ADDENDUM
        THIS ADDENDUM MAY NOT BE AMENDED OR MODIFIED (OR ANY PART DELETED
         OR ADDED TO) WITHOUT THE WRITTEN CONSENT OF OPTICOM'S GENERAL
             COUNSEL OBTAINED IN ACCORDANCE WITH THE PROVISIONS OF
                THE OPERATOR SERVICES AGREEMENT IDENTIFIED BELOW

                             LUMP SUM BONUS ADDENDUM

         ONE CALL COMMUNICATIONS, INC., ("Opticom") and PHONETEL TECHNOLOGIES,
INC., ("Customer") shall modify and supplement the Operator Services Agreement
("Operator Services Agreement") between Opticom and Customer dated January 21,
2000.

         1. Lump Sum Bonus. In consideration of the Agreements of Customer
contained in Sections 2 and 3 of this Addendum, Opticom agrees to and will pay
to Customer a lump sum bonus (herein "Bonus") in the amount of
__________________________________thirty (30) days after the end of the first
billing month during which Customer has at least ____________________ Active
Locations (as hereinafter defined) being provided Operator Services by Opticom
on Opticom's Operator Services Network. As used in this Addendum, the term
"Active Location" shall mean a payphone Location owned by Customer which, during
the applicable billing month, has Operator Services MOS and OAS charges (as
those terms are defined in the Operator Services Agreement) which are billable
by Opticom pursuant to the Operator Services Agreement.

         2. Minimum Gross Monthly Billings Guarantee; Liquidated Damages. In
consideration of the payment of the Bonus by Opticom, Customer guarantees that,
at all times during the term of the Operator Services Agreement, the gross
billings for Operator Services provided by Opticom pursuant to the Operator
Services Agreement during each billing month during the full term of this
Agreement will always be not less than_______________
____________________________________ per month (the "Minimum Monthly Billings
Guarantee"). If, during any billing month during the first twelve (12) month
period from the commencement date of the Operator Services Agreement and after
the Bonus is paid, the gross monthly billings for Operator Services provided by
Opticom pursuant to the Operator Services Agreement are less than the Minimum
Monthly Billings Guarantee, Customer shall repay to Opticom, as liquidated
damages and not as a penalty, the full amount of the Bonus theretofore paid to
Customer, to-wit, the sum of ______________________________________. If Customer
satisfies the Minimum Monthly Billings Guarantee during the first twelve (12)
month period but, at during any billing month during the second twelve (12)
month period from the commencement date of the Operator Services Agreement, the
gross monthly billings for Operator Services provided by Opticom pursuant to the
Operator Services Agreement are less than the Minimum Monthly Billings
Guarantee, Customer shall repay to Opticom, as liquidated damages and not as a
penalty, one-half (1/2) of the Bonus, to-wit, the sum of
_______________________________________________.
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         3. Exclusivity Agreement. In further consideration of the payment of
the Bonus by Opticom, Customer agrees that, as to all Locations of Customer
which were used by Customer to qualify for payment of the Bonus, Opticom shall
be, during the full term of the Operator Services Agreement, the exclusive
provider of all Operator Services provided for such Locations which shall be one
hundred percent (100%) of all Operator Service Long Distance calls (both
automated and live operator calls) made from such Locations excepting only (i)
those calls which must be processed through another carrier by reason of any law
or regulation (including, but not limited to, "dial around") and (ii) calls made
during verifiable periods of time during which Opticom's Operator Services
Network is unable to process such calls. Customer further agrees that, during
the full term of the Operator Services Agreement, Customer will not (i) utilize
store and forward equipment to process Operator Service calls from such
Locations or (ii) employ or use any device, mechanism, procedure, or protocol
which causes some types of Operator Services calls to be directed to a
telecommunications carrier other than Opticom except for calls made during
verifiable periods of time during which Opticom's Operator Services Network is
unable to process such calls. Customer additionally agrees to utilize Opticom as
the exclusive 1+ telecommunications provider for all coin-paid long distance
calls made from such Locations during the full term of the Operator Services
Agreement except for calls made during verifiable periods of time during which
Opticom' is unable to process such calls. All of the aforesaid agreement
contained in this Section 3 of this Addendum are collectively referred to herein
as the "Exclusivity Agreements".

         3.1 Liquidated Damages for Breach. If Customer fails to fully cure any
         breach by Customer of any of its Exclusivity Agreements within seven
         (7) calendar days after Opticom gives Customer written notice thereof
         in accordance with the provisions of the Operator Services Agreement,
         Customer shall be liable to Opticom for liquidated damages for each
         separate billing month during which an uncured breach occurs or
         continues in an amount determined as set forth below.

         3.2 Computation of Liquidated Damages. The amount of liquidated damages
         payable by Customer during each billing month an uncured breach of any
         of its Exclusivity Agreements occurs shall be determined by (i)
         dividing the gross MOS and AOS revenue from Customer's Locations for
         the highest gross revenue billing month theretofore experienced during
         the term of the Operator Services Agreement ("Highest Gross Revenue")
         by the total number of completed Operator Services calls from all of
         such Locations made during such billing month to determine the average
         per call revenue for such billing month ("Average Call Revenue"); by
         (ii) multiplying the Average Call Revenue times the total number of
         Operator Services calls placed from all of Customer's Locations during
         the month such uncured breach occurred to determine the damage factor
         ("Damage Factor"); and (iii) subtracting the Damage Factor amount from
         the Highest Gross Revenue amount, with the difference to be the amount
         of liquidated damages payable by Customer for such month.

         4. Payment of Liquidated Damages; Attorney Fees; Interest; Set Off. All
liquidated damages payable by Customer pursuant to the provisions of this
Addendum shall be payable fifteen (15) calendar days after Opticom makes demand
for payment thereof, and such liquidated damages shall be payable with
reasonable attorney fees if not paid by Customer when due. If any liquidated

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damage payments are not paid when due, interest shall accrue on the unpaid
amount commencing on the date the payment was due at a rate which is three (3)
percentage points higher than the Prime Rate as published in the Money Rates
Column of the Wall Street Journal on the first business day after the liquidated
damages payment is due and payable. Opticom may set off any unpaid liquidated
damages against commissions and property surcharges and any other amounts
payable to Customer pursuant to the Operator Services Agreement.

         5. Choice of Law and Place of Litigation. This Addendum shall be
governed by the laws of the State of Indiana. Opticom and Customer stipulate,
consent, and agree that the only and exclusive place for litigation of any claim
for liquidated damages or other damages asserted by Opticom against Customer
arising out of or under this Addendum shall be in either (i) the Circuit or
Superior Courts located in Hamilton County, Indiana or (ii) the United States
District Court for the Southern District of Indiana, Indianapolis Division, and
Customer consents and waives all objections to the exercise of personal
jurisdiction over it by the aforesaid courts.

         6. Additional Confidentiality Agreement. Customer further agrees to
maintain in strict confidence and not disclose or permit any officer, employee,
agent, or affiliate to disclose to any person, firm, corporation, or other
entity or organization this Addendum, any information pertaining to this
Addendum, and the payment to Customer of the Lump Sum Bonus pursuant to this
Addendum except such disclosure as may be required by court order, regulations
and to comply with the law. In the event any such prohibited disclosure is made
by Customer or by any officer, employee, agent, or affiliate of Customer,
Customer shall pay to Opticom, as liquidated damages, an amount equal to the
Lump Sum Bonus paid to Customer pursuant to this Addendum.

         7. Headings and Titles. The headings and titles in this Addendum are
for convenience of reference only and shall not be construed to define or limit
any of the terms herein or affect the meanings or interpretations of this
Agreement.

         8. Entire Agreement. This Addendum represents the entire agreement and
understanding of the parties hereto with respect to the subject matter hereof,
and all prior and concurrent agreements, understandings, representations with
respect to such subject matter, whether written or oral, are and have been
merged herein and superseded hereby.

         9. Defined Terms. All defined words and terms contained in the Operator
Service Agreement which are utilized in this Addendum shall have the same
meanings in this Addendum as in the Operator Service Agreement.

         10. Execution; Counterparts; Facsimile Delivery. This Addendum may be
executed by each of the parties in counterparts, and, if it is, each counterpart
shall be deemed to be an original instrument, but the counterparts together
shall constitute only one Addendum. This Addendum will be deemed fully executed
by all parties if the counterparts, taken together, bear the signatures of duly
authorized representatives of each of the parties. A copy of this Addendum
showing the signature of a party's authorized representative which is received
by a party by means of an electronic or facsimile telephonic transmission
initiated or made by the other party shall be binding upon the other party and
shall constitute delivery of this Addendum by such other party for all

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purposes. The exchange by all of the parties of duly signed copies of this
Addendum transmitted by such parties to each other by means of electronic or
facsimile telephonic transmissions shall result in a legally enforceable
contract binding upon all parties.

         IN WITNESS WHEREOF, Opticom and Customer have executed this Addendum by
their duly authorized officers this 21st day of January, 2000.

ONE CALL COMMUNICATIONS, INC.               PHONETEL TECHNOLOGIES, INC.

By: /s/ Brad Benge                          By: /s/ John D. Chichester
    -----------------------------              ------------------------------

Title: Executive Vice President             Title: President and CEO
       --------------------------                  --------------------------

                                       4<PAGE>   1
EXHIBIT  10.30

         THE TERMS OF THIS ADDENDUM ARE PROPRIETARY TO OPTICOM AND ARE
        SUBJECT TO A CONFIDENTIALITY AGREEMENT SET FORTH IN THE OPERATOR
                       SERVICES AGREEMENT IDENTIFIED BELOW

           THIS ADDENDUM MAY NOT BE AMENDED OR MODIFIED (OR ANY PART
         DELETED OR ADDED TO) WITHOUT THE WRITTEN CONSENT OF OPTICOM'S
         GENERAL COUNSEL OBTAINED IN ACCORDANCE WITH THE PROVISIONS OF
                THE OPERATOR SERVICES AGREEMENT IDENTIFIED BELOW

         INTERNATIONAL SERVICES ADDENDUM TO OPERATOR SERVICES AGREEMENT

         Opticom and the undersigned Customer agree that this Addendum shall
modify and supplement the Operator Services Agreement ("Operator Services
Agreement") between ONE CALL COMMUNICATIONS, INC. ("Opticom") and PHONETEL
TECHNOLOGIES, INC. ("Customer") dated January 21, 2000.

         1. International Services. Customer hereby requests that Opticom
provide international operator long distance services ("International Services")
for those Locations (ANI's) of Customer which Customer designates in writing,
from time to time. Opticom agrees to provide International Services for such
Locations designated in writing by Customer but only upon the terms and
conditions set forth in this Addendum which shall supersede any provisions to
the contrary contained in the Operator Services Agreement and the exhibits
thereto. Customer may, from time to time, in writing, add and delete Locations
which are to be provided with International Services.

         2. Fraudulent International Services Calls. Opticom will utilize its
existing standard verification procedures and contractors to verify the validity
of calling cards and credit cards (collectively "Cards") utilized by an
International Services user and will otherwise utilize standard verification
procedures for International Services calls, but Customer and Opticom
acknowledge and agree that (i) as to Cards, such verification procedures are
only effective if a Card has been reported lost or stolen or if a Card has
otherwise been revoked or terminated and (ii) a person can utilize unreported
lost or stolen Cards or illicitly obtained data for a Card which has not been
lost or stolen and to otherwise use improper procedures to fraudulently obtain
International Services for which the call charges are uncollectible. The parties
further acknowledge that uncollectible telephone charges for fraudulently
obtained International Services can be very substantial and material in both
amount and volume and that the carrier charges incurred by Opticom to complete
such calls can be substantial in amount.

         3. Customer to Bear Risk of Fraudulent International Services Calls. In
consideration of Opticom providing International Services for Customer's
Locations, Customer agrees to be totally responsible and to assume all economic
risks for carrier charges incurred by Opticom for fraudulently obtained
International Services placed from Customer's Locations. Customer shall
reimburse Opticom for Opticom's carrier costs for such fraudulent International
Services calls at rate of _____________________________ per minute of use of
such calls, the minutes of use for
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such calls to be determined from Opticom's recorded minutes of use for such
calls. In addition, if Opticom has paid to Customer commissions and additional
surcharges on such fraudulent International Services calls, Customer shall
refund such commissions and additional surcharges to Opticom, it being agreed
that no commission and additional surcharge shall be payable to Customer for or
on such fraudulent International Services calls. The parties agree that the
uniform deduction for write-offs ("Bad Debt") for operator services billings
which is provided for by Customer's Operator Services Agreement used to
determine Adjusted Billings shall not limit Customer's liability under this
Addendum for fraudulent International Services calls. Opticom may deduct all
sums owing by Customer to Opticom pursuant to the foregoing provisions of this
Addendum from commissions payable by Opticom to Customer pursuant to the
Operator Services Agreement.

         4. Commissions. Opticom agrees to pay to Customer commissions for all
International Services calls which will be a percentage of Opticom's Adjusted
Billings for International Services calls placed from Customer's designated
Locations at a rate of ____________________________, subject, however, to the
terms and provisions of this Addendum. Adjusted Billings for International
Services are to be computed in the manner specified in Customer's Operator
Services Agreement.

         5. No International Direct Dial. Opticom agrees to program all of its
switches to block international direct dial long distance service from all of
Customers Locations which are subject to the Operator Services Agreement.

         6. No Other Changes. Except as herein modified and amended, all other
terms and provisions of the Operator Services Agreement shall remain in full
force and effect.

         7. Headings and Titles. The headings and titles in this Addendum are
for convenience of reference only and shall not be construed to define or limit
any of the terms herein or affect the meanings or interpretations of this
Addendum.

         8. Defined Terms. All defined words and terms contained in the Operator
Service Agreement which are utilized in this Addendum shall have the same
meanings in this Addendum as in the Operator Service Agreement unless the
context of this Addendum requires otherwise.

         9. Entire Agreement. This Addendum represents the entire agreement and
understanding of the parties hereto with respect to the subject matter hereof,
and all prior and concurrent agreements, understandings, representations with
respect to such subject matter, whether written or oral, are and have been
merged herein and superseded hereby.

         10. Execution; Counterparts; Facsimile Delivery. This Addendum may be
executed by each of the parties in counterparts, and, if it is, each counterpart
shall be deemed to be an original instrument, but the two counterparts together
shall constitute only one Addendum. This Addendum will be deemed fully executed
by both parties if the counterparts, taken together, bear the signatures of duly
authorized representatives of each of the parties. A copy of this Addendum
showing the signature of the other party's authorized representative which is
received by a party by means of an electronic or facsimile telephonic
transmission initiated or made by the other party shall be binding upon the
other party and shall constitute delivery of this Addendum by such other party
for all purposes. The exchange by the parties of duly signed copies of this
Addendum transmitted by such parties to each other by means of electronic or
facsimile telephonic transmissions shall result in a legally enforceable
contract binding upon both parties.
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         IN WITNESS WHEREOF, Opticom and Customer have executed this Addendum by
their duly authorized officers this 16th day of February, 2000.

ONE CALL COMMUNICATIONS, INC.               PHONETEL TECHNOLOGIES, INC.

By: /s/ Joseph Pence                        By: /s/John D. Chichester
    -----------------------------              ------------------------------

Title:   President                          Title: President and CEO
       --------------------------                 ---------------------------

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