Exhibit 4.26.4  Additional Agreement No. 4  To the Contract on Network Connection between
between OAO Rostelecom and OJSC Sibirtelecom
No.1-01 dated August 1, 2003
as amended by the Agreement dated December 28, 2005  Moscow
  
  Dated:
  June 14, 2007  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 Sibirtelecom, Open Joint-Stock Company,
hereinafter referred to as the Operator, represented by General Director A.I. Nikulin, 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 Contract on Network
Connection No. 1-01 dated August 01, 2003 as amended by the Agreement
dated December 28, 2005 (hereinafter, the Contract), as follows:  1.The Contract shall be
supplemented with new Clause 1.12  1.12Service of zone termination of call to a mobile
telecommunication network shall mean the service of zone termination of call
to a mobile telecommunication network which is not identifiable geographically
within the RF territory and using the numbering capacity of the numbering zone
which is not identifiable geographically, of the Operator and the service of
zone termination of call to a mobile telecommunication network which is not
identifiable geographically within the territory of the Russian Federation and
using the numbering capacity of the numbering zone which is not identifiable
geographically, of another operator, with zone call transit within the territory
of a single settlement.  2.Clause 1.12
of the Contract shall be marked as Clause 1.13and set
forth as follows:  1.13Traffic Admission
Services shall mean the service of zone termination of call to a network
of an Associated Operator outside and within a single settlement; the service
of zone termination of call to the Operators network outside and within a
single settlement; the service of zone initiation of call from the Operators
network outside and within a single settlement; 
the service of zone initiation of call from a network of an Associated
Operator outside and within a single settlement and the Service of zone
termination of call to a mobile telecommunication network, in connection with
Rostelecoms rendering to Users of long-distance and international
telecommunication services.  3.Clause 6.1.2of
the Contract shall be amended as follows:  6.1.2.In the course of rendering Traffic
Admission Services including connections through codes 80X, tariffing is
performed per second from the 1st second of connection. The total volume for
each service during the Reporting period is approximated to full minutes in the
direction of the bigger figure.  4.Clauses 6.1.3 and 6.1.4 of the Contract to be excluded.  5.Clause 6.6.2of
the Contract shall be amended as follows:  No later than
the 6th day of the Billing Period Rostelecom submits the Operator a
Report on volumes of the services rendered for the Traffic Admission Services
with the following data:  1


a) on the volume of the Services rendered for
zone call initiation from the Operators network within the territory of a
single settlement including on codes 80X 100, 80X 200, 8-10-800 and on codes 80X
X1X2X3 
(where X1X2X3- is the code of the IS Operator
interconnected to Rostelecoms network);  b) on the volume of the Services rendered for
zone call initiation from the Associated Operators networks within the
territory of a single settlement including on codes 80X 100, 80X 200, 8-10-800
and on codes 80X X1X2X3  (where X1X2X3- is the code of the IS
Operator interconnected to Rostelecoms network);  c) on the volumes of the Services rendered
for zone termination of call to the Operators network within the territory of
a single settlement;  d) on the volumes of
the Services rendered for zone termination of call to the Associated Operators
networks within the territory of a single settlement;  e)on the
volumes of services renderedfor zone termination of call to a mobile
telecommunication network which is not identifiable geographically within the
RF territory and using the numbering capacity of the numbering zone which is
not identifiable geographically, of another operator with call zone transit  f) on the volume of the Services rendered for
zone call initiation from the Operators network beyond the territory of a
single settlement including on codes 80X 100, 80X 200, 8-10-800 and on codes 80X
X1X2X3 
(where X1X2X3- is the code of the IS Operator
interconnected to Rostelecoms network);  g) on the volume of the Services provided for
zone call initiation from the Associated Operators networks beyond the
territory of a single settlement including on codes 80X 100, 80X 200, 8-10-800
and on codes 80X X1X2X3  (where X1X2X3- is the code of the IS
Operator interconnected to Rostelecoms network);  h) on the volumes of the Services rendered
for zone termination of call to the Operators network beyond the territory of
a single settlement;  i) on the volumes of
the Services rendered for zone termination of call to the Associated Operators
networks beyond the territory of a single settlement;  j)  on the volumes of the Services rendered for zone
termination of call to the Operators mobile telecommunication network which is
not identifiable geographically within the RF territory and using the numbering
capacity of the numbering zone which is not identifiable geographically.  Copies of the
Rostelecom Report shall be sent to the Operator in the electronic form.  6.Clause 6.7.1 of the
Contract shall be amended as follows:  6.7.1.
Operator:  a) on the Services rendered for zone call
initiation from the Operators network within the territory of a single
settlement including on codes 80X 100, 80X 200, 8-10-800 and on codes 80X X1X2X3  (where X1X2X3- is the code of the IS Operator interconnected to
Rostelecoms network);  b) on the Services rendered for zone call
initiation from the Associated Operators networks within the territory of a
single settlement including on codes 80X 100, 80X 200, 8-10-800 and on codes 80X
X1X2X3 
(where X1X2X3- is the code of the IS Operator
interconnected to Rostelecoms network);  c) on the Services rendered for zone
termination of call to the Operators network within the territory of a single
settlement;  d) on
the Services rendered for zone termination of
call to the Associated Operators networkswithin the territory of a
single settlement;  e) on the Services rendered for zone
termination of call to a mobile telecommunication network which is not
identifiable geographically within the RF territory and using the numbering
capacity of the numbering zone which is not identifiable geographically, of
another operator with call zone transit  2


f) on the Services rendered for zone call
initiation from the Operators network beyond the territory of a single
settlement including on codes 80X 100, 80X 200, 8-10-800 and on codes 80X X1X2X3  (where X1X2X3- is the code of the IS Operator interconnected to
Rostelecoms network);  g) on volume of the services provided for
zone call initiation from the Associated Operators networks beyond the
territory of a single settlement including on codes 80X 100, 80X 200, 8-10-800
and on codes 80X X1X2X3  (where X1X2X3- is the code of the IS
Operator interconnected to Rostelecoms network);  h) on the Services rendered for zone
termination of call to the Operators network beyond the territory of a single
settlement;  i)on
the Services rendered for zone termination of
call to the Associated Operators networksbeyondthe territory of a single settlement;  j)on
the Services rendered for zone termination of
call to the Operators mobile telecommunication network which is not
identifiable geographically within the RF territory and using the numbering
capacity of the numbering zone which is not identifiable geographically.  3


7.Clause 1.1 Appendix 1 of
the Contract shall be amended as follows:  1.1.Traffic
admission services rendered by the Operator:  Table 1, part 1  Amount of payment, roubles (net of VAT)ABC1ab
  
  ABC1a(b)
  
  ABC2 ab)
  
  ABC2a(b)
  
  ABC3 ab
  
  ABC3a(b)
  
  ABC4 ab
  
  ABC4a(b)
  
  ABC5 ab
  
  ABC5a(b)No.
  
  Description of the service
  
  301: 2
  
  301: 30-
  50, 53, 56
  
  302: 2
  
  302:
  30-49, 51-
  53, 55-57,
  61.62, 64-
  66
  
  381: 2
  
  381: 41,
  50-79
  
  382: 2
  
  382: 23,
  41, 43-47,
  49-52,
  54 -59
  
  383
  
  383: 40,
  41, 43,
  45-69,
  71-73Ulan-Ude
  
  Republic
  of
  Buryatiya
  
  Chita
  
  Chita
  Region
  
  Omsk
  
  Omsk
  Region
  
  Tomsk
  
  Tomsk
  Region
  
  Novosibirsk
  
  Novosibirsk
  Region1.1
  
  Zone initiation of call from the Operators network
  
  0.90+ c.c.
  (1)
  
  
  0.90+ c.c.
  
  
  
  0.71+ K.H.
  
  
  
  0.90+ K.H.
  
  
  
  0.71+ K.H.1.2
  
  Zone initiation of call from the network of the
  Associated Operator
  
  0.90
  
  
  
  0.90
  
  
  
  0.71
  
  
  
  0.90
  
  
  
  0.711.3
  
  Service of zone termination of call to the Operators
  fixed telephone network
  
  0.90
  
  
  
  0.90
  
  
  
  0.71
  
  
  
  0.90
  
  
  
  0.711
  
  Within the
  territory of a
  single
  settlement
  
  1.4
  
  Service of zone termination of call to an Associated
  Operators fixed telephone network
  
  00.90
  
  
  
  00.90
  
  
  
  00.71
  
  
  
  00.90
  
  
  
  00.711.5
  
  Service of zone termination of call to a mobile
  telecommunication network which is not identifiable geographically within the
  RF territory and using the numbering capacity of the numbering zone which is
  not identifiable geographically, of another operator with zone call transit
  
  1.62
  
  
  
  1.62
  
  
  
  1.43
  
  
  
  1.62
  
  
  
  1.43  1


Table 1, part 2  Amount of payment, roubles (net of VAT)ABC1ab
  
  ABC1a(b)
  
  ABC2 ab)
  
  ABC2a(b)
  
  ABC3 ab
  
  ABC3a(b)
  
  ABC4 ab
  
  ABC4a(b)
  
  ABC5 ab
  
  ABC5a(b)No.
  
  Description of the service
  
  301: 2
  
  301: 30-
  50, 53, 56
  
  302: 2
  
  302:
  30-49, 51-
  53, 55-57,
  61.62, 64-
  66
  
  381: 2
  
  381: 41,
  50-79
  
  382: 2
  
  382: 23,
  41, 43-47,
  49-52,
  54 -59
  
  383
  
  383: 40,
  41, 43,
  45-69,
  71-73yAH-yэ
  
  Republic
  of
  Buryatiya
  
  Chita
  
  Chita
  Region
  
  Omsk
  
  Omsk
  Region
  
  Tomsk
  
  Tomsk
  Region
  
  Novosibirsk
  
  Novosibirsk
  Region2.1
  
  Zone initiation of call from the Operator's network
  
  
  
  1.50+ c.c.
  
  
  
  1.50+ c.c.
  
  
  
  1.23+ c.c.
  
  
  
  1.50+ c.c.
  
  
  
  1.23+ c.c.2
  
  Beyond the 
  territory of a
  single
  settlement
  
  2.2
  
  Zone initiation of call from the network of the
  Associated Operator
  
  
  
  1.50
  
  
  
  1.50
  
  
  
  1.23
  
  
  
  1.50
  
  
  
  1.232.3
  
  Service of zone termination of call to the Operator's
  fixed telephone network
  
  
  
  1.50
  
  
  
  1.50
  
  
  
  1.23
  
  
  
  1.50
  
  
  
  1.232.4
  
  Service of zone termination of call to an Associated
  Operator's fixed telephone network
  
  
  
  1.50
  
  
  
  1.50
  
  
  
  1.23
  
  
  
  1.50
  
  
  
  1.232.5
  
  Service of zone termination of call to a mobile
  telecommunication network which is not identifiable geographically within the
  RF territory and using the numbering capacity of the numbering zone which is
  not identifiable geographically, of another operator with zone call transit
  
  
  
  2.22
  
  
  
  2.22
  
  
  
  1.95
  
  
  
  2.22
  
  
  
  1.953
  
  
  
  3
  
  Service of zone termination of call to a mobile
  telecommunication network which is not identifiable geographically within the
  RF territory and using the numbering capacity of the numbering zone which is
  not identifiable geographically, of the Operator
  
  0.95
  
  0.95
  
  0.95
  
  0.95
  
  0
  
  0
  
  0.95
  
  0.95
  
  0
  
  0  2


Table 1, part 3  Amount of payment, roubles (net of VAT)ABC6 ab
  
  AB6C6a(b)
  
  ABC7 ab
  
  ABC7a(b)
  
  ABC8 ab
  
  ABC8a(b)
  
  ABC9 ab
  
  ABC9a(b)
  
  ABC10 ab
  
  ABC10a(b)
  
  ABC11 ab
  
  ABC11a(b)No.
  
  Description of the service
  
  384: 2, 3
  
  384:
  41-49, 51-56,
  59, 63, 64
  ,66, 71.73, 74
  
  385: 2
  
  385: 10-19,
  24, 30-39,
  50-79,
  90-99
  
  388
  
  388: 36,
  40-49
  
  390: 2
  
  390: 31,
  32,
  34-36, 41,
  42, 44-47
  
  391: 2, 5
  
  391:
  9-19,
  31-59,
  61-65,
  67-69,
  71-79,
  95, 97, 98
  
  395: 2
  
  395: 1, 3,
  10-14,
  17.18, 30,
  35-46, 48,
  49, 60-69,
  73Kemerovo
  Novokuznetsk
  
  Kemerovo
  Region
  
  Barnaul
  
  Altai
  Territory
  
  Gorno-
  Altaisk
  
  
  
  Abakan
  
  Khakassiya
  
  Krasnoyarsk
  Krasnet
  
  Krasnoyarsk
  Territory
  
  Irkutsk
  
  Irkutsk
  Region1.1
  
  Zone initiation of call from the Operators network
  
  0.71+ c.c.
  
  
  
  0.71+ c.c.
  
  
  
  0.71+ c.c.
  
  
  
  0.90+ c.c.
  
  
  
  0.90+ c.c.
  
  
  
  0.90+ c.c.1.2
  
  Zone initiation of call from the network of the
  Associated Operator
  
  0.71
  
  
  
  0.71
  
  
  
  0.71
  
  
  
  0.90
  
  
  
  0.90
  
  
  
  0.901.3
  
  Service of zone termination of call to the Operators
  fixed telephone network
  
  0.71
  
  
  
  0.71
  
  
  
  0.71
  
  
  
  0.90
  
  
  
  0.90
  
  
  
  0.901
  
  Within the
  territory of a
  single
  settlement
  
  1.4
  
  Service of zone termination of call to an Associated
  Operators fixed telephone network
  
  00.71
  
  
  
  00.71
  
  
  
  00.71
  
  
  
  00.90
  
  
  
  00.90
  
  
  
  00.901.5
  
  Service of zone termination of call to a mobile
  telecommunication network which is not identifiable geographically within the
  RF territory and using the numbering capacity of the numbering zone which is
  not identifiable geographically, of another operator with zone call transit
  
  1.43
  
  
  
  1.43
  
  
  
  1.43
  
  
  
  1.62
  
  
  
  1.62
  
  
  
  1.622
  
  Beyond the
  territory of a
  single
  settlement
  
  2.1
  
  Zone initiation of call from the Operators network
  
  
  
  1.23+ c.c.
  
  
  
  1.23+ c.c.
  
  
  
  1.23+ c.c.
  
  
  
  1.50+ c.c.
  
  
  
  1.50+ c.c.
  
  
  
  1.50+ c.c.2.2
  
  Zone initiation of call from the network of the
  Associated Operator
  
  
  
  1.23
  
  
  
  1.23
  
  
  
  1.23
  
  
  
  1.50
  
  
  
  1.50
  
  
  
  1.50  3


2.3
  
  Service of zone termination of call to the Operators
  fixed telephone network
  
  
  
  1.23
  
  
  
  1.23
  
  
  
  1.23
  
  
  
  1.50
  
  
  
  1.50
  
  
  
  1.502.4
  
  Service of zone termination of call to an Associated
  Operators fixed telephone network
  
  
  
  1.23
  
  
  
  1.23
  
  
  
  1.23
  
  
  
  1.50
  
  
  
  1.50
  
  
  
  1.502.5
  
  Service of zone termination of call to a mobile
  telecommunication network which is not identifiable geographically within the
  RF territory and using the numbering capacity of the numbering zone which is
  not identifiable geographically, of another operator with zone call transit
  
  
  
  1.95
  
  
  
  1.95
  
  
  
  1.95
  
  
  
  2.22
  
  
  
  2.22
  
  
  
  2.223
  
  
  
  3
  
  Service of zone termination of call to a mobile
  telecommunication network which is not identifiable geographically within the
  RF territory and using the numbering capacity of the numbering zone which is
  not identifiable geographically, of the Operator
  
  0
  
  0
  
  0
  
  0
  
  0
  
  0
  
  0.95
  
  0.95
  
  0.95
  
  0.95
  
  0.95
  
  0.95 »  4


8.Item 1) Note of Appendix No. 1
to the Contract shall be amended as follows:    1)In
the course of settlements for rendered Service of zone initiation of call from
the Operators network except for traffic through codes 80X, in addition to the
accounting rate a compensation charge shall be levied which charge is
established, as from January 1, 2006, in accordance with Order No. 733-C/7
of the RF Federal Tariff Service dated December 20, 2005, in the amount of
0.65 roubles rubles per minute, and a compensation charge established, as from February 1,
2007 in accordance with Order of the RF Federal Tariff Service No. 279-C/3
dated November 17, 2006, in the amount of 0.50 rubles per minute.  9.Appendix 4 of the Contract
shall be amended as follows:  Appendix No. 4
to Contract No.1-01
dt. August 01, 2003
as amended by Agreement dated December 28, 2005  Traffic Admission Services Report Form
Under Contract No.                  
dt.  for                 
month  This Report is drawn up between
Rostelecom, Open Joint-Stock Company for Long-Distance and International
Telecommunications, hereinafter, Rostelecom, represented by authorized
to act by Power of attorney No.                                  dt.                                  on
the one part, and    OJSC Sibirtelecom, Operator
hereinafter, represented
by                                  acting
on the basis
of                                  
collectively referred to as Parties hereinafter, to certify that the Operator
has rendered the following services to Rostelecom:  Services rendered by the Operator  Ref. No.
  
  Description of the service
  
  Measurement
  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
  
  Service of zone termination of call to a
  fixed telephone network which is identifiable geographically within the
  territory being serviced and using the numbering capacity of the numbering
  zone which is identifiable geographically, of the OPERATOR within the territory
  of a single settlement2
  
  Service of zone termination of call to a
  fixed telephone network which is identifiable geographically within the
  territory being serviced and using the numbering capacity of the numbering
  zone which is identifiable geographically, of the OPERATOR outside the
  territory of a single settlement  1


3
  
  Service of zone termination of call to a
  fixed telephone network which is identifiable geographically within the
  territory being serviced and using the numbering capacity of the numbering
  zone which is identifiable geographically, of another telecommunication
  operator within the territory of a single settlement4
  
  Service of zone termination of call to a
  fixed telephone network which is identifiable geographically within the
  territory being serviced and using the numbering capacity of the numbering
  zone which is identifiable geographically, of another telecommunication
  operator outside the territory of a single settlement5
  
  Service of zone termination of call to a
  mobile telecommunication network which is not identifiable geographically
  within the territory of the Russian Federation being serviced and using the
  numbering capacity of the numbering zone which is not identifiable
  geographically, of the OPERATOR6
  
  Service of zone termination of call to a
  mobile telecommunication network which is not identifiable geographically
  within the territory of the Russian Federation being serviced and using the
  numbering capacity of the numbering zone which is not identifiable
  geographically, of another telecommunication operator with call zone transit within
  the territory of a single settlement7
  
  Service of zone termination of call to a
  mobile telecommunication network which is not identifiable geographically
  within the territory of the Russian Federation being serviced and using the
  numbering capacity of the numbering zone which is not identifiable
  geographically, of another telecommunication operator with call zone transit,
  beyond the territory of a single settlement  2


8
  
  Service of zone initiation of call from the
  OPERATORs network within the territory of a single settlement9
  
  Service of zone initiation of call from the
  OPERATORs network beyond the territory of a single settlement10
  
  Service of zone initiation of call from a
  telecommunication network of another telecommunication operator within the
  territory of a single settlement11
  
  Service of zone initiation of call from a
  telecommunication network of another telecommunication operator beyond the
  territory of a single settlement12
  
  Update of the information on subscribers of
  the Operator13
  
  Update of the information on subscribers of
  the Associated OperatorTotal  The rendered
services cost aggregated                ,
including VAT              .  Note: The Parties shall execute a consolidated Act of Acceptance of
Services covering the whole of the Operator, with a breakdown by the Operators
branches  The services
were presented properly and according to Agreement terms.  Note:  The Parties shall sign the Services Report on each Operators affiliate
rendering services and Consolidated Report on services rendered in general by
the Operator  For
  Rostelecom:
  
  For
  Operator:OAO Rostelecom
  
  OJSC Sibirtelecom:200
  
  200Seal here
  
  Seal here  3


Rostelecom:
  
  
  
  Operator:General Director
  
  
  
  General
  DirectorOAO
  Rostelecom
  
  
  
  OJSC Sibirtelecom:D.Ye.
  Yerokhin
  
  
  
  A.I. NikulinDated                            
  2007
  
  
  
  Dated                          2007Seal here
  
  
  
  Seal here  »  10.Clause 5 of Appendix 5 of the Contract shall be
amended as follows:  Rostelecom submits to the Operator monthly
reports on the volume of the rendered Traffic admission Services, containing
the data:  a) on the volume of the Services rendered for
zone call initiation from the Operators network within the territory of a
single settlement including on codes 80X 100, 80X 200, 8-10-800 and on codes 80X
X1X2X3 
(where X1X2X3- is the code of the IS Operator
interconnected to Rostelecoms network);  b) on the volume of the Services rendered for
zone call initiation from the Associated Operators networks within the
territory of a single settlement including on codes 80X 100, 80X 200, 8-10-800
and on codes 80X X1X2X3  (where X1X2X3- is the code of the IS
Operator interconnected to Rostelecoms network);  c) on the volumes of the Services rendered
for termination of call to the Operators network within the territory of a
single settlement;  d) on the volumes of
the Services rendered for termination of call to the Associated Operators
networks within the territory of a single settlement;  e) on the
volumes of the Services rendered for zone termination of call to a
mobile telecommunication network which is not identifiable geographically
within the RF territory and using the numbering capacity of the numbering zone
which is not identifiable geographically, of another operator with call zone
transit  f) on the volume of the Services rendered for
zone call initiation from the Operators network beyond the territory of a
single settlement including on codes 80X 100, 80X 200, 8-10-800 and on codes 80X
X1X2X3 
(where X1X2X3- is the code of the IS Operator
interconnected to Rostelecoms network);  g) on the volume of the Services rendered for
zone call initiation from the Associated Operators networks beyond the
territory of a single settlement including on codes 80X 100, 80X 200, 8-10-800
and on codes 80X X1X2X3  (where X1X2X3- is the code of the IS
Operator interconnected to Rostelecoms network);  h) on the volumes of the Services rendered
for termination of call to the Operators network beyond the territory of a
single settlement;  i) on the volumes of
the Services rendered for termination of call to the Associated Operators
networks beyond the territory of a single settlement;  j)  on the volumes of the Services rendered for zone
termination of call to the Operators mobile telecommunication network which is
not identifiable geographically within the RF territory and using the numbering
capacity of the numbering zone which is not identifiable geographically.  11.All terms used in this
Agreement have a meaning, fixed for them in the Contract.  12.All the rest, not indicated in
this Agreement, is subject to the provisions of the Contract.  13.The agreement is issued in the
Russian language in two original counterparts, one for each Party.  14.The Agreement shall become
effective as of its date and shall remain in effect until the expiry of the
Contract on connection of telecommunications networksNo. 1-01
datedAugust 1, 2003, as amended by the
Agreement on December 28, 2005. The Parties  4


recognize that
the terms and conditions of their Agreement shall apply to their relations
arising as from July 01, 2006.  15.Details and Signatures of the
Parties  OAO Rostelecom:
  
  
  
  OJSC Sibirtelecom:Legal address:
  
  
  
  Legal address:15, Dostoyevsky st.,
  
  
  
  53, M. Gorky st.,Saint Petersburg, 191002
  
  
  
  Novosibirsk, 630099General Director
  
  
  
  General DirectorD.Ye. Yerokhin
  
  
  
  A.I.
  NikulinDated                              
  2007
  
  
  
  Dated                          2007Seal here
  
  
  
  Seal here  5