Exhibit 4.20.1  AdditionalAgreementNo.to Agency Agreement No. 596-08-16 dated April 17th, 2008  Moscow
  
  2008  Open Joint-Stock Company Long Distance and
International Telecommunications Rostelecom, hereinafter
referred to as Rostelecom represented by its
Director General Mr. K.Yu. Solodukhin, acting on the basis of the Articles
of Association, on the one part, and Public Joint-Stock Company Southern Telecommunications Company, hereinafter referred to as the Operator, represented by its Director General Mr. A.V.
Andreev, acting on the basis of the Articles of Association, on the other part,
jointly referred to as the Parties, have made this Additional Agreement to
Agency Agreement No. 596-08-16 dated April 17th, 2008 as follows:  1.In Clause 1.2 of the Agreement after the words  means any legal the
words (or individuals in cases prescribed by this Agreement) shall be
added.  2.Clause 2.1.3 shall be added to Article 2: 2.1.3. make on behalf
of Rostelecom with individual users to whom long distance and international
communication services were provided for three months (June, July and August 2008)
for over 2,000 rubles per month on average, using one of the Agreement Forms
approved by the Parties in compliance with Appendix No.1 hereto, an agreement
for Rostelecom long distance and international communication services on
condition of Rostelecom pre-selection as the communication operator providing
such services.  3.Clause 2.1.4 shall be added to Article 2: 2.1.4. offer to
individual users to whom long distance and international communication services
were provided for three months (June, July and August 2008) for over
2,000 rubles per month on average, an application for pre-selection of
Rostelecom as the long distance and international communication operator using
the form approved by the Parties.  4.The services prescribed by Clauses 2.1.3 and 2.1.4 shall be provided by
the Operator by December 15th, 2008.  5.In Clause 3.1 of the Agreement the words specified in Clauses 2.1.1
and 2.1.2 shall be replaced by specified in Clauses 2.1.1  2.1.4.  6.Clause 5.1.4 shall be added to Article 5: 5.1.4. For each
agreement signed for Rostelecom long distance and international communication
services or sent application for pre-selection of Rostelecom as the long
distance and international communication operator in compliance with Clauses
2.1.3 and 2.1.4 in the amount prescribed by Clause 6.1.1 hereof. Payment for
each signed agreement/sent application shall be made only on condition of
actual arrangement of pre-selection by Users of Rostelecom as an operator
providing long distance and international communication services. The
remuneration specified in this Clause shall include any expenses which the
Operator incurs performing its obligations under Clauses 2.1.3 and 2.1.4 hereof.  7.Clause 6.1 of the Agreement shall be revised as follows: 6.1. Settlements
between the Parties under Clauses 2.1.1 and 2.1.2 of the Agreement shall be
made on a monthly basis and under Clauses 2.1.3 and 2.1.4 of the Agreement 
one time after the campaign for individual users which did not pre-select
Rostelecom as an operator providing long distance and international
communication services as of September 01st, 2008, on the
basis of this Agreement and the Operators Report on agency functions
performance (Operators Report) in the forms given in Appendixes No.3, 4 and
5 hereto. Any cash assets owing to the Operator for performing its obligations
under Clauses 2.1.3 and 2.1.4 shall be transferred to the Operators settlement
account within 3 days after approval of the Operators Report (Appendixes No.4,
5).  8.Clause 6.1.1 shall be added to Article 6: 6.1.1.
The fee under Clause 5.1.4 for signing an agreement for long distance and
international communication services/ sending an application for pre-selecting
Rostelecom as an operator providing long distance and international
communication services shall be calculated for each profitability category
separately using the following formula:  So = K*Cd*D, where


Sois an amount due for made
agreements / signed applications in the reporting period to the Operators
settlement account;  Kis the number of
made agreements / signed applications from the campaign start;  Cis an amount due for
one made agreement / signed application in compliance with the table below:  Profitability
  
  Share of made agreements /
  signed applications (%)
  and the corresponding fee (rub. with VAT)Profitability 
  category
  
  criteria, rub.
  with VAT
  
  up to30%
  
  31-40%
  
  41-50%
  
  51-60%
  
  61-70%
  
  71-80%
  
  81-90%
  
  91-100%A
  
  > 2,001
  
  150
  
  160
  
  170
  
  190
  
  260
  
  360
  
  460
  
  710B
  
  501  2, 000
  
  130
  
  140
  
  150
  
  160
  
  260
  
  360
  
  460
  
  510C
  
  201 - 500
  
  160
  
  160
  
  160
  
  160
  
  160
  
  160
  
  160
  
  160D
  
  51- 200
  
  130
  
  130
  
  130
  
  130
  
  130
  
  130
  
  130
  
  130E
  
  <50
  
  80%
  of the average monthly ARPU for 3 months  d is a share of made agreements
/ signed applications as of December 15th, 2008 (%) of the total number of
individual users  subscribers of the Operator and shall be calculated for each
profitability category;  Dis a coefficient from 0 to 1
defined by the Parties in compliance with the actual performance of targets for
the number of made agreements / signed applications from the campaign start*  
 *The Parties have agreed the
following target values:  Upon
the Operators activities prescribed by Clauses 2.1.3 and 2.1.4 in respect of
51.5% and more of the total number of individual users - the Operators
subscribers who did not pre-select Rostelecom as an operator providing long
distance and international communication services as of September 01st, 2008, the
coefficient D shall equal 1. Upon the Operators activities prescribed by
Clauses 2.1.3 and 2.1.4 in respect of less than 51.5% of the total number of
individual users - the Operators subscribers who did not pre-select Rostelecom
as an operator providing long distance and international communication services
as of September 01st, 2008, the coefficient D shall be calculated
according to the formula D = d:. 51.5 %.  The coefficients K, C and D shall be calculated on the
basis of the obligations under Clauses 2.1.3 and 2.1.4 hereof by the Operator
for each profitability category.  9.The first sentence of Clause 6.2 of the Agreement shall be revised as
follows: By the 8th day of the Accounting Period the
Operator shall send to Rostelecom the Operators Report in the form given in
Appendix No.3, a bill indicating the fee calculated in compliance with Clause
5.1. hereof and the expenses for reimbursement as well as copies of source
documents confirming the amount and necessity of any incurred expenses.  10.Clause 6.2.1 shall be added to Article 6: The Operators Reports
in the forms given in Appendixes No.4 and 5 shall be filed by December 19th, 2008.  11.The following appendixes shall be added to Clause 10.6:  AppendixNo.4.The form for the list of users
with whom the procedure was changed for selecting an operator providing long
distance and international telephone communication services with pre-selection
of Rostelecom;  Appendix
No.5. The form of the Operators Report on performance of the agency functions
under Clauses 2.1.3 and 2.1.4 of Agency Agreement No. 596-08-16 dated April 17th, 2008.  2


12.The Parties have agreed that the Operator shall compile and send to
Rostelecom information on individual users  the Operators subscribers who
confirmed in writing their selection of Rostelecom as an operator providing
long distance and international telephone communication services on condition
of pre-selection as of September 01st, 2008 within 5 days after signing of this
Additional Agreement.  In
compliance with this Clause Rostelecom shall pay the Operator the following
remuneration:  ·1
ruble (without VAT calculated at the rate effective on the billing date) for
entry on one individual user who as of September 01st, 2008 pre-selected Rostelecom as an
operator providing long distance and international telephone communication
services in the responsibility area of each constituent territory of the
Russian Federation where the Operator has a branch, and the number of such
users is at least 51% of the total number of individual users - subscribers of
the Operator in the corresponding constituent territory of the Russian
Federation;  ·5
rubles (without VAT calculated at the rate effective on the billing date) for
entry on one individual user who as of September 01st, 2008 pre-selected Rostelecom as an
operator providing long distance and international telephone communication
services in the responsibility area of each constituent territory of the
Russian Federation where the Operator has a branch, and the number of such
users is over 51% of the total number of individual users - subscribers of the
Operator in the corresponding constituent territory of the Russian Federation.  The
Operator shall provide the information specified in this Clause in the form
given in Appendix No.1 to this Additional Agreement. With the information in
compliance with Appendix No.1 to this Additional Agreement the Operator shall
send to Rostelecom a bill, an invoice and the acceptance report.  Rostelecom
shall pay for the Operators services in compliance with this Clause by December 25th, 2008.  13.The Parties have agreed that in case the pre-selection by any individual
user of Rostelecom as an operator providing long distance and international
communication services results in any additional expenses for such individual
user (changing the connection category), Rostelecom shall reimburse such
expenses for such individual users to the Operator according to the Operators
rates (Appendix No.3 to this Additional Agreement).  By
December 19th, 2008 the Operator shall send to Rostelecom a
notice (list) of the Users specified in this Clause according to the form given
in Appendix No.2 to this Additional Agreement as well as a bill, an invoice and
the acceptance report. Rostelecom shall reimburse such expenses by December 25th, 2008.  14.The Parties shall confirm all their other obligations under Agency
Agreement No. 596-08-16 dated April 17th, 2008 not specified in this
Agreement.  15.This Agreement is made in duplicate with the same legal effect with one
copy for each Party.  16.This Agreement shall take effect from its signing by the Parties and
shall remain in force till December 25th, 2008.  17.Details and Signatures of the Parties:  ROSTELECOM:Rostelecom OJSC  Legal
address: 191002, St. Petersburg, 15, Dostoevskogo Street. Postal
address: 344006, Rostov-on-Don, 152, Pushkinskaya Street Rostelecom Southern Branch TIN: 7707049388, BIC: 046015602, S/account:
40702810452000103144 C/account: 30101810600000000602 with the South-Western
Bank SB RF, Rostov-on-Don; OKONKh (All-Russian
Classifier of Sectors of the National Economy):52300,OKPO: 01152551, KPP: 616303001 Fax: (863 2) 66-50-87, Contact telephone numbers: (863
2) 264-06-36, 266-64-44.  OPERATOR:UTK PJSC:  Legal
address: 350000, Krasnodar, 66, Karasunskaya Street Postal
address: 350000, Krasnodar, 66, Karasunskaya Street  3


TIN
2308025192, BIC 040349602 C/account
40702810330010120048 with Krasnodar Sberbank Branch 8619, Krasnodar c/a
30101810100000000602, OKPO
01151037, KPP 997750001 Fax:
(861) 253-25-30, Contact telephone numbers: (861) 253-98-88,
(861) 255-86-77  ROSTELECOM:
  
  OPERATOR:Director General
  
  Director
  GeneralRostelecom OJSC
  
  Southern
  Telecommunications Company OJSCMr. K.Yu.
  Solodukhin
  
  
  Mr. A.V.
  Andreev,
  2008
  
  ,
  2008Seal
  here
  
  Seal
  here  4


Appendix No.1 to Additional Agreement No.         
dated to Agency Agreement No. 596-08-16 dated April 17th, 2008  Information on Users who
Confirmed in Writing their Selection of Rostelecom as an Operator Providing
Long Distance and International Telephone Communication Services in the
Pre-selection Mode as of September 01st, 2008  Unique 
  subscribers 
  number ASP 
  Course
  
  Full name
  
  Address of 
  the 
  subscribers 
  number
  
  Subscribers 
  number:
  code, 
  subscribers 
  number
  xxxxxxxxxx
  
  Fee for long
  distance and 
  international 
  traffic in 
  June, rub.
  
  Fee for long 
  distance and 
  international 
  traffic in July, 
  rub.
  
  Fee for long 
  distance and 
  international 
  traffic in 
  August, rub.1
  
  2
  
  3
  
  4
  
  5
  
  6
  
  7  ROSTELECOM:
  
  OPERATOR:Director General
  
  Director
  GeneralRostelecom OJSC
  
  Southern
  Telecommunications Company OJSCMr. K.Yu.
  Solodukhin
  
  
  Mr. A.V.
  Andreev,
  2008
  
  ,
  2008Seal
  here
  
  Seal
  here  5


AppendixNo.2 toAdditionalAgreementNo.          dated to Agency Agreement No. 596-08-16 dated April 17th, 2008  Form of the Notice of Changing the Category of the Users End
Communication Network Device  NOTICE  , 200  Hereby we inform you of changing
the category of end communication network devices of the following Users:  No.
  
  Users
  name
  
  Subscribers 
  number address
  
  User equipment
  number
  
  Date of the 
  category change
  
  New category
  
  Rate1
  
  2
  
  3
  
  4
  
  5
  
  6
  
  7  ROSTELECOM:
  
  OPERATOR:Director General
  
  Director
  GeneralRostelecom OJSC
  
  Southern
  Telecommunications Company OJSCMr. K.Yu.
  Solodukhin
  
  
  Mr. A.V.
  Andreev,
  2008
  
  ,
  2008Seal
  here
  
  Seal
  here  6


Appendix No.3 to Additional Agreement No.         
dated to Agency Agreement No. 596-08-16 dated April 17th, 2008  Amount of reimbursement for the works required in connection with
changes in the selection method 
for subscribers to long distance and international telephone communication 
on condition of pre-selecting Rostelecom OJSC  UTK Branch
  
  For individual users living 
  in cities, rub. (with VAT)
  
  Forindividualuserslivinginruralareas,rub.(with VAT)1
  
  2
  
  3
  
  41
  
  Adygeya
  branch
  
  80.00
  
  80.002
  
  Astrakhan
  branch
  
  85.00
  
  85.003
  
  Volgograd
  branch
  
  93.00
  
  91.504
  
  Kabardino-Balkariabranch
  
  51.00
  
  51.005
  
  Kalmykia
  branch
  
  81.00
  
  81.006
  
  Karachayevo-Cherkessianbranch
  
  60.00
  
  50.007
  
  Krasnodar
  branch
  
  115.00
  
  115.008
  
  Rostov
  branch
  
  100.00
  
  100.009
  
  NorthOssetiabranch
  
  160.00
  
  160.0010
  
  Stavropol
  branch
  
  140.00
  
  140.00  ROSTELECOM:
  
  OPERATOR:Director General
  
  Director
  GeneralRostelecom OJSC
  
  Southern
  Telecommunications Company OJSCMr. K.Yu.
  Solodukhin
  
  
  Mr. A.V.
  Andreev,
  2008
  
  ,
  2008Seal
  here
  
  Seal
  here  7


AppendixNo.4 to Agency Agreement No. 596-08-16 dated April 17th, 2008  The form for the list of users with whom the procedure was changed for
selecting an operator providing long distance and international telephone
communication services with pre-selection of Rostelecom OJSC  Profitability
  criterion
  
  Users name
  
  Unique identifier (account number)
  of the user
  
  Agreement number
  
  Agreement date/
  application signing date
  
  Userequipmentinstallationaddress
  
  Subscriber telephone number 
  with ABC area
  
  Average profitability of the user for 3 months (rub.)1
  
  2
  
  3
  
  4
  
  5
  
  6
  
  7
  
  8  ROSTELECOM:
  
  OPERATOR:Director General
  
  Director
  GeneralRostelecom OJSC
  
  Southern
  Telecommunications Company OJSCMr. K.Yu.
  Solodukhin
  
  
  Mr. A.V.
  Andreev,
  2008
  
  ,
  2008Seal
  here
  
  Seal
  here  8


Appendix No.5
to Agency Agreement No. 596-08-16 dated April 17th, 2008  The Form of the Operators Report on Agency Functions Performance
under  Clauses 2.1.3, 2.1.4 of Agency Agreement No.596-08-16 dated April 17th, 2008  UTK
  Branch
  
  Profitability criteria 
  in the segment, 
  rub., with VAT
  
  Number of made 
  agreements / signed 
  applications in the 
  reporting period
  
  % of coverage*
  
  Cost per coverage
  
  Coefficient D
  
  Total for payment
  
  VAT
  
  Total with VAT>2,001from
  501 to 2,000from
  201 to 500...
  
  ...
  
  ...
  
  ...
  
  
  
  ...
  
  ...
  
  ...>2,001...
  
  from
  501 to 2,000from
  201 to 500TOTAL
  
  >2,001from
  501 to 2,000from
  201 to 500  
 *Note: the term % of coverage shall in this case mean a value defined as a
relation of the number of individual users who confirmed in writing their
pre-selection of Rostelecom OJSC as an operator providing long distance and
international telephone communication services to the total number of
individual users of long distance and international telephone communication
services at a particular time.  ROSTELECOM:
  
  OPERATOR:Director General
  
  Director
  GeneralRostelecom OJSC
  
  Southern
  Telecommunications Company OJSCMr. K.Yu.
  Solodukhin
  
  
  Mr. A.V.
  Andreev,
  2008
  
  ,
  2008Seal
  here
  
  Seal
  here  9