Exhibit 4.35.1  Additional Agreement No. 1  To the Contract on Network Connection between OAO Rostelecom and OJSC CenterTelecom as amended by Agreement No. 6480/05-DO dated January 1, 2006  Moscow
  
  
  
  Dated: August 25, 2006   Rostelecom,
Open Joint-Stock Company for Long-Distance and International Telecommunications
(OAO Rostelecom), hereinafter, Rostelecom, represented by OAO
Rostelecom General Director Dmitry Yevgenievich
Yerokhin, authorized to act by the Charter, on the one part, and
Central Telecommunication Company, Open Joint-Stock Company (OJSC
CenterTelecom), hereinafter referred to as the Operator, represented by OJSC
CenterTelecom General Director S.V. Pridantsev,
authorized to act by the Charter, on the other part hereinafter collectively
referred to as the Parties, and severally, as Party, have entered into this
Additional Agreement (hereinafter, the Agreement) on the incorporation of the
below-listed amendments to the Contract on Network Connection (hereinafter, the
Contract), as follows:  1.In Clause 1.6. of the Contract - to delete the last paragraph.  2.Clause 1.7.
of the Contract shall be amended as follows:  1.7. Associated
Operator shall mean a telecommunications operator who meets all of
the following criteria:  a) The telecommunication network of such an
operator is interconnected into the network of the Operator on the local and/or
zonal level;  b) Such a Telecommunications operator on the
basis of a correspondent contract concluded between this operator and
Rostelecom, or between this operator and the Operator on behalf of Rostelecom
performs billing with its Users for Long-Distance and International
Telecommunication services rendered to them by Rostelecom or the Operator on
behalf of Rostelecom performs billing with the Users of such an operator for
Long-Distance and International Telecommunication Services rendered to them by
Rostelecom.  3.In Clause 1.13. of the Contract of the Contract, the words Operators
Users shall be substituted by the word Users.  4.Clause 3.3 shall be added by
a paragraph as follows:  3.3.11.
To inform Rostelecom on the numbering capacity of the Associated Operators and
its changes. The Operator no later than the last day of the reporting period
submits to Rostelecom the detailed information on numbering capacity of the
Associated Operators in accordance to Appendix 5.  5.Clause 6.1.
of the Contract shall be amended as follows:  6.1.
Terms of payment for Traffic Admission Services:  6.1.1.
Rostelecom shall pay for Traffic admission services in accordance with tariffs
specified in Appendix No. 1 attached herein. The cost of Traffic admission
Services for the Accounting period is calculated on the basis of the data on
the natural volumes of the rendered Traffic admission Services during the
Accounting period.   1


6.1.2.
Rendering Traffic Admission Services tariffing is calculated on a minute basis
commencing from the 1st second of the connection and the rounding up
of the time of the connection up to the whole minute; Any services for
admission of traffic lasting for less than six seconds, except services
rendered for zone initiation of call through codes 803 X1X2X3,shall not be tariffed.  6.1.3.
Time of the connections performed through codes 803 X1X2X3is calculated from the 1st second of the connection.  6.Clause 12.1.
of the Contract shall be amended as follows:  The
Agreement is valid for the period of one year from the moment of its coming
into effect. If neither Party announces termination of this Agreement thirty
(30) calendar days before its stated expiration, this Agreement shall be
automatically extended for each subsequent year. The number of periods for
which the effect hereof can be prolonged is not limited.  7.The following Paragraph
shall be included in Appendix 1:  1.3. Cost of the services of updating subscriber information in the
database, for one line of update:  No.
  
  Description of the service
  
  Roubles, excluding VAT1.
  
  Update of the Operators
  information on Subscribers
  
  1.002.
  
  Update of the Associated
  Operators information on Contract Subscribers
  
  2.00  8.Appendix 7 of the Contract shall be amended as follows:  Appendix No. 7 to Contract on Network Connection as amended by Agreement No. 6480/05-DO
dated January 1, 2006   SETTLEMENT PROCEDURE FOR TRAFFIC ADMISSION SERVICES  Whereas
the Parties  confirm and accept that
amounts payable and terms of payment for Connection services rendered by  Rostelecom to the Operator and for Traffic
admission services rendered by the Operator to Rostelecom shall be determined
in accordance with fulfillment by the Parties obligations specified in
Agreement No.           dated
              
(hereinafter referred to as Assistance Agreement) concluded between them now
therefore the Parties agree to establish the following procedures for payments
on this Contract:  1.
Rostelecom shall pay to the Operator for Traffic admission services rendered to
Rostelecom by the Operator remuneration in accordance with terms and amounts
specified hereinafter. Total amount of financial obligations payable by
Rostelecom for services rendered by the Operator to Rostelecom in relevant
billing period shall be determined in accordance with the Services Report for
the Accounting period.  2.
No later than the 25th day of the Billing period Rostelecom is
obliged to transfer to the Operator the sum in the amount X,
equal to the summary cost of the traffic admission Services rendered by the
Operator during all periods preceding the Billing period, unpaid for by
Rostelecom, the cost of which has been calculated in accordance with  2


Appendix
1 to the Agreement. At that, the maximal amount of Xdue
to payment in every Billing period equals  
Z, the value of which is calculated by
the following formula:  Z = M 
Y, where  M and Y
have the value calculated for them in para. 2.2. of Appendix 7 of the
Assistance agreement for the corresponding Billing period.  The
calculated sum X is reckoned by the Operator on
account of payment for the traffic admission Services rendered to Rostelecom
under this Agreement, during all its validity periods in the part where these
services are not paid for at the moment of payment calculation. The Parties
agree that the payments are in the first place accounted against the payment
for traffic admission Services rendered during earlier periods.  3.
Rostelecom transfers to the Operator payments in accordance with para. 2 hereof
until the total amount of payments transferred by Rostelecom hereunder equals
the total cost of the traffic admission Services rendered to Rostelecom by the
Operator hereunder.  4.
The Operator shall issue invoices for payments to Rostelecom in accordance with
paragraph 2 of this Appendix for amounts determined in accordance with terms
specified in aforesaid paragraph by 20th day of the month in which relevant
payment is to be effected.  5.
In case by the 25th day of the Billing period the total cost of the
traffic admission Services rendered to Rostelecom by the Operator in accordance
with the Act of services rendered during the corresponding Accounting period,
exceeds the amount of the Accrued income for the telecommunications Services
rendered by Rostelecom to the Users during the corresponding Accounting period,
with the deduction of Potential income of the Operator from the  services connected with them, rendered to
Rostelecom by the Operator in accordance with Assistance agreement, the
difference between the indicated amounts must be paid by Rostelecom to the Operator
before the 25th day of the Billing period in addition to the amount
X due to payment in accordance with para. 2 hereof. At that, the Potential
income is calculated as the sum of Accrued income multiplied by the service
payment rate and the remuneration for the performance of the actions specified
in Appendix 2 to the Assistance agreement.  6.
Para. 2-4 of this Appendix 7 are not applied by the accounts settlement
between the Parties for the traffic admission Services rendered to Rostelecom
by the Operator, in connection with the rendering by Rostelecom of the
long-distance and international telecommunication services to the Users of
Associated Operators, the accounts settlement with such Users are performed by
the indicated Associated Operator on commission of Rostelecom. Such Traffic
admission Services rendered during the Accounting period are paid for by
Rostelecom before the 25th day of the Billing period, in corpore.  7.
In order to terminate (partially terminate) the obligations specified in this
Appendix and mutual obligations of the Parties arising from Assistance
Agreement the Parties shall perform monthly offset counterclaims by execution
of Offset Acts in due dates set for fulfillment of such obligations by the
Parties in accordance with terms specified herein and in Assistance Agreement.  9.This Agreement is an
integral part of the Contract.  10.All terms used in this
Agreement have a meaning, fixed for them in the Contract.  11.All the rest, not indicated
in this Agreement, is subject to the provisions of the Contract.   3


12.The agreement is issued in
the Russian language in two original counterparts, one for  each Party.  13.This Agreement comes into
effect on the date of its execution. The Parties recognize that the terms and
conditions of their Agreement shall apply to their relations arising as from
the date of the Contract on connection of telecommunication networks as amended
by Agreement No. 6480/05-DO dated January 01, 2006.  14.Signatures of the Parties:  For Rostelecom:
  
  For Operator:General Director
  
  General DirectorOAO Rostelecom
  
  OJSC CenterTelecom:D.Ye. Yerokhin
  
  S.V.PridantsevSeal here
  
  Seal here    4