Exhibit No.4.35.7  Additional Agreement No. 7  To the Contract on Network
Connection between OAO Rostelecom and OJSC CenterTelecom as
amended by Agreement No. 6480/05-DO
dated January 01, 2006  Moscow
  dated 25 August, 2006   Rostelecom, Open Joint-Stock
Company for Long-Distance and International Telecommunications, hereinafter, Rostelecom, represented by OAO Rostelecom General
Director D. Ye. Yerokhin, authorized to act by
the Charter, on the one part, and CenterTelecom, Open Joint-Stock Company, 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 referred to as Party have entered into this Additional
Agreement (hereinafter  Agreement) to the Contract on Network Connection as
amended by Agreement No. 6480/05-DO dated January 01, 2006
(hereinafter  Contract), as follows:  1.To add the following clauses to Appendix No. 9
to the Contract:  «  8.The Operator shall in case of technical equipment of software failure
and because of the effect various other conditions resulting in garbling, loss
of the data or impossibility of timely transfer, to inform Rostelecom about the
reasons of such failures with retransmission of reliable data.  9.Cooperation in the updating of the data on Subscribers between the
Parties is realized through the data exchange in an approved format set in
Appendix No. 9 to the Contract.  The
following data should be transmitted: data on the Subscribers, the list of
which is set by Appendix No. 9 and which are changed through the Reporting
period.  10.Basic
unit for the cost of the Subscribers database updating service is the total
reliable information concerning one Operators Subscriber account. Reliability
of the data is the correspondence of the data to the format of Appendix No. 9
to this Contract and the condition of the Operators Subscribers database on
the condition on the 1st day of the Billing period.  11.Rostelecom makes monthly payment for the services under Appendix 1 to
this Contract per 1 base unit of reliable and timely transmitted data on the
Subscribers of the Operator.  12.The Operator by the 5th day of the Billing Period sends to Rostelecom
an Act and an invoice indicating the effective volume of the Subscribers
database updating services within the Reporting period, and Rostelecom shall by
the 8th of the Billing period approves the Act. If there are any
remarks in connection to the volume of the services rendered, Rostelecom
approves the Act with the remarks. The Parties shall by the 20th day
of the Billing period to reconcile these remarks. The Form of the Act is
given in Appendix 1 to this Agreement.  13.Rostelecom pays for the Subscribers database updating services no later
than 10 days after signing of the Act by the Parties.


14.If
information transmitted for the Operators Subscribers database updating
services was presented incorrectly or needs additional data Rostelecom sends an
inquiry to the Operator. Retransmission of the information on the Subscribers,
the correction of the data is free of charge if performed because of the fault
of the Operator  2.The Agreement is issued in the Russian language in two original counterparts,
one for  each Party.  3.All terms used in this Agreement have a meaning, fixed for them in the
Contract.  4.This Agreement is an inseparable part of the Contract.  5.All the rest, not indicated in this Agreement, is subject to the
provisions of the Contract.  6.This Agreement comes into effect on the date of its execution. The
Parties hereby establish that terms and conditions of the Agreement entered
into thereby shall apply to their relations arisen from the date of the
Contract on Network Connection as amended by Agreement No. 6480/05-DO
dated January 01, 2006.  For Rostelecom:General DirectorOAO RostelecomD.Ye. YerokhinSeal hereFor Operator:General DirectorOJSC CenterTelecom:S.V.PridantsevSeal here


Attachment No. 1 to Additional Agreement No.7 dt. «      »
                      
2006  Form 1  Services Report, Under Contract No.                  
dt. for                             
month  This Act is drawn up between Rostelecom,
Open Joint-Stock Company for Long-Distance and International Telecommunications,
hereinafter, Rostelecom, represented by OAO Rostelecom General Director Dmitry Yevgenievich Yerokhin, authorized to act by the
Charter, on the one part, and                                                         ,
hereinafter referred to as the Operator, represented by                                             ,
authorized to act by                   ,
on the other part, hereinafter collectively referred to as the Parties, confirming
the following services rendered by the Parties to each other:  Services rendered by  the 
Operator  Ref. No.
  
  Description of the service
  
  Measure
  unit
  
  Number
  
  Service
  Tariff,
  roubles/pcs
  
  Service Cost
  net of VAT,
  roubles
  
  VAT,
  roubles
  
  Service Cost
  inc.VAT,
  roubles1
  
  2
  
  3
  
  4
  
  5
  
  6
  
  7
  
  81
  
  Actualization
  of data on the Operators subscribers2Total  The
rendered services cost aggregated                  ,
including VAT               .  The services were presented properly and according to
Agreement terms.  For Rostelecom:
  
  
  
  
  
  For Operator:General Director
  
  
  
  
  
  General DirectorOAO Rostelecom
  
  
  
  
  
  OJSC CenterTelecom:D.Ye. Yerokhin
  
  
  
  S.V. Pridantsev200
  
  
  
  200Seal here
  
  
  
  Seal here