Exhibit 4.36.1

Additional Agreement No. 1

To Contract between OAO Rostelecom and OJSC CenterTelecom

No. 6479/05-DO(749-05-23) dated January 01, 2006

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 Central Telecommunication Company, Open Joint-Stock Company (OJSC CenterTelecom), hereinafter referred to as the “Operator”, represented by 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 No. 6479/05-DO(749-05-23) entered into by the Parties on 01.01.2006 (hereinafter, “the Contract”), as follows:

1.                            Clause 1.6. of the Contract shall be amended as follows:

“1.6. Users” means persons, including subscribers, ordering and/or using the Services through the Operator, or through a communication operator whose communication network is connected to the Operator’s network at the local or zonal level and which is not an Affiliated Operator, provided that settlements with such persons for the Communication services provided by Rostelecom are effected by the Operator in accordance with the terms and conditions of this Agreement. The list of communication operators whose communication networks are connected to the Operator’s network at the local or zonal level, which are not Affiliated Operators, and settlements with which for the Communication services provided by Rostelecom are effected by the Operator in accordance with the terms and conditions of this Agreement, will be provided in a separate Additional agreement to be executed by the Parties on or after the effective date of this Agreement.”

2.                            Clause 1.4. of the Contract shall be amended as follows:

“1.4. “Accrued income” means payments to the Operator by the Users for the Telecommunication Services rendered in the corresponding month.”

Clause 1.7. of the Contract shall be amended as follows:

“1.7. “Revenue earned” means  the income actually received by the Operator from the Users in the corresponding month on account of payment for the Telecommunication Services.

3.                            Clause 1.8. of the Contract shall be amended as follows:

“1.8 “Billing period” means a calendar month following the Reporting period”.

4.                            Clause 1.10. of the Contract shall be amended as follows:

“Long-distance communication services” shall mean a telephone connection between user (terminal) equipment connected to a local telephone telecommunication network and located within the territory of various constituent entities of the Russian Federation, or a telephone connection between user (terminal) equipment connected to a local telephone telecommunication network within the territory of a single constituent entity of the Russian Federation and user (terminal) equipment connected to a mobile telecommunication network, where the respective subscriber of that mobile telecommunication network is given a subscriber number included in

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the capacity of the numbering zone which is not identifiable geographically and assigned to a different constituent entity of the Russian Federation. For the purposes of this agreement, a telephone connection between Users of the Operator’s ABC Zones 498, 495 and 496 in the Moscow Region shall not be deemed a Long-distance communication service.

5.                            Article 1 of the Contract shall be supplemented with a new Clause 1.13 as follows:

“1.13. “Reporting period” means a calendar month during which Telecommunication Services were rendered to the Users”.

6.                            Paragraph 3.3.10 of the Contract shall be added by the following provision: “Draw up second copies of invoices” and add the words “second copies of invoices” before the words “of billing data”.

7.                            Amend Clause 5.7. with the words “on a monthly basis, as required”.

8.                            Appendix No. 3 shall be amended in version 2:

Appendix No. 3 (version 2)

to Contract No. 6479/05-DO(749-05-23)

dated January 01, 2006

Operator’s Report

on the accrued income paid for the Services rendered to the Users

under Contract No. 6479/05-DO(749-05-23) dated January 01, 2006

Form 1.1

The report on the volumes and accrued income for the international Telecommunication Services rendered to individuals (direction- and time-wise) in the ABC zone of the Operator

Form 1.2

The report on the volumes and accrued income for the international Telecommunication Services rendered to self-sustained organizations (direction- and time-wise) in the ABC zone of the Operator

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Form 1.3

The report on the volumes and accrued income for the international Telecommunication Services rendered to budgetary organizations (direction- and time-wise) in the ABC zone of the Operator

Form 1.4

The report on the volumes and accrued income for the long-distance Telecommunication Services  rendered to individuals (direction- and time-wise) in the ABC zone of the Operator

Form 1.5

The report on the volumes and accrued income for the long-distance telecommunications services rendered to self-sustained organizations (direction- and time-wise) in the ABC zone of the Operator

Form 1.6

The report on the volumes and accrued income for the long-distance Telecommunication Services rendered to budgetary organizations (direction- and time-wise) in the ABC zone of the Operator

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Note to completion of Forms  1.1.-1.6:

1.              Rostelecom offers the Operator the blank of the Forms 1.1-1.6 to be filled (in the Excel format). Attached to the Forms is the title-page. The form of the title-page for the Forms 1.1.-1.6:

(c) OAO Rostelecom, Main Computer Center

When entering data in the template please use Notes (prompt messages) to the cells, select a parameter from the list (cells C13, C17) buttons: Select (“OK”) and “Validate data entered in title page” (TITUL)

2.         The reports on the volumes and accrued income for the services rendered are drawn up for each ABC zone of the Operator in separate forms 1.1 - 1.6.  At that, each of the forms includes the consolidations for the incoming directions of the connection (data aggregation is performed for each incoming direction, tariff and tariff category).

3.         The Operator presents to Rostelecom the consolidated data for all ABC zones.

4.         The transferred files must be named in accordance with the following name structure:

XXXX ZZZZZZ FFF CCCCCCC UU.xls,

·                  XXXX — four-digit sign-digit operator number assigned by Rostelecom

·                  ZZZZZZ — reporting period in the form YYYYMM

·                  FFF — conventional number of the form of the Operator’s report. For the reports 1.1.-1.6. acquires the value: 316 (Appendix 3 of the Forms 1.1 - 1.6 in one file)

·                  CCCCCCC — code of the outgoing ABC (up to seven digits);

·                  UU — ordinal number of the report. The ordinal number of the document sent by the Telecommunications Operator to Rostelecom for the first time is always indicated 00. In case of detection of discrepancy between the Operator’s data and the data of Rostelecom on the data contained in the file or its faulty filling the Operator prepares a new amended version of the file and sends it to Rostelecom in accordance with the conditions of the agreement. Every new version of the file is formed by means of increasing the document ordinal number by 1.

·                  In the column “Direction” of the Forms 1.1.-1.6 (below the “Total” line) the names of the directions are indicated (names of foreign countries or long-distance zones) with the division in accordance with the tariffs of Rostelecom into international and long-distance telecommunications, and in the column “Direction code” their codes are indicated (long-distance and international codes are indicated without additional prefixes).

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·                  In the columns “Tariff category” of the Forms 1.1-1.6 the conventional code of the entry affiliation to the tariff category is indicated. The list of the codes is drawn up by Rostelecom depending on the tariffs applied.

·                  In the reports on individuals (1.1, 1.4) the tariffs and totals must include the amounts of VAT. In the reports on self-sustained and budgetary organizations (1.2, 1.3, 1.5, 1.6.) the tariffs and totals must not include the amounts of VAT.

Form 1.7

The consolidated report of the Operator on the volumes and accrued income for the international and long-distance telecommunications rendered to all categories of users

Note to completion of Form 1.7:

1.              Rostelecom offers the Operator the blank of Form 1.7 to be filled (in the Excel format). Attached to the Forms is the title-page. The form of the title-page for Form 1.7.:

(c) OAO Rostelecom, Main Computer Center

When entering data in the template please use Notes (prompt messages) to the cells, select a parameter from the list (cells C13, C17) buttons: Select (“OK”) and “Validate data entered in title page” (TITUL)

2.         In Form 1.7. the Operator presents the consolidated data on the volume and accrued income for the services rendered during the reporting period in all ABC zones of the Operator.

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3.         The transferred files must be named in accordance with the following name structure:

XXXX ZZZZZZ FFF UU.xls,

·                  XXXX — four-digit sign-digit operator number assigned by Rostelecom

·                  ZZZZZZ — reporting period in the form YYYYMM

·                  FFF — conventional number of the form of the Operator’s report. For the reports of Form 1.7. acquires the value: 317 (Appendix 3 of the Form 1.7. in one file)

·                  UU — ordinal number of the report. The ordinal number of the document sent by the Telecommunications Operator to Rostelecom for the first time is always indicated 00. In case of detection of discrepancy between the Operator’s data and the data of Rostelecom on the data contained in the file or its faulty filling the Operator prepares a new amended version of the file and sends it to Rostelecom in accordance with the conditions of the agency agreement. Every new version of the file is formed by means of increasing the document ordinal number by 1.

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Form 2. The Operator’s report on the payments for the long-distance and international telecommunications of OAO Rostelecom in

2.1.  Service rendering, service payments, service arrears variation in                           , roubles, kopecks

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2.2 Service prepayment flow in                   month, roubles, kopecks

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Note to completion of Forms  2.1.-2.2:

1.          Rostelecom offers the Operator the blank of the Forms 2.1-2.2 to be filled (in the Excel format). Attached to the Forms is the title-page. The form of the title-page for the Forms 2.1.-2.2:

(c) OAO Rostelecom, Main Computer Center

When entering data in the template please use Notes (prompt messages) to the cells, select a parameter from the list (cells C13, C17) buttons: Select (“OK”) and “Validate data entered in title page” (TITUL)

2.          Forms 2.1 - 2.2 include consolidated data on the accrued and received income, the state of indebtedness and correction for all subsidiaries and ABC zones of the Operator.

3.          The reports are filled out in the context of the periods of service rendering: one line of the report corresponds to one service period, the information is provided  about service payment arrears, service rendering etc. during the current reporting period.

4.          The columns “Correction of arrears...” and “Write-off of arrears...” are filled periodically and on the basis of the documents indicated in Appendix 9 hereto.

5.          The transferred files must be named in accordance with the following name structure:

XXXX ZZZZZZ FFF UU.xls,

·             XXXX- four-digit sign-digit operator number assigned by Rostelecom

·             ZZZZZZ — reporting period in the form YYYYMM

·             FFF — conventional number of the form of the Operator’s report. Can acquire the values: 321 (Appendix 3, Form 2.1), 322 (Appendix 3, Form 2.2)

·             UU — ordinal number of the report. The ordinal number of the document sent by the Telecommunications Operator to Rostelecom for the first time is always indicated 00. In case of detection of discrepancy between the Operator’s data and the data of Rostelecom on the data contained in the file or its faulty filling the Operator prepares a new amended version of the file and sends it to Rostelecom in accordance with the conditions of the agency agreement. Every new version of the file is formed by means of increasing the document ordinal number by 1.

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9.                            Appendix No. 4 shall be amended in version 2:

Peculiarities of the Interaction of Rostelecom and the Operator
for the Provision of the Observance of the VAT Law

1.  Drawing up of invoices and submittal of documentation on VAT

The Operator draws up invoices in the form approved by the Governmental Regulation of the Russian Federation No.914 of 02.12.2000, only for the services of Rostelecom rendered to legal entities and individual entrepreneurs without the establishment of a legal entity, as well as for the prepayment services of Rostelecom rendered to the mentioned categories of Users.

The lines of the invoices are filled as follows:

Column 1 of the invoice must contain the phrase “Long-distance telecommunications”, “International telecommunications” or “Long-distance and international telecommunications” the number and date of the agreement concluded between Rostelecom and the Users-legal entities, (if the like agreement was concluded by drawing up a single document) or the phrase Public offer of the OAO Rostelecom dt.                    (if the like agreement was concluded in any other way).  The invoices for the services of Rostelecom rendered to the population, as well as for the prepayment for the services of Rostelecom received from the population are not drawn.  For the registration in the account-book the Operator draws up (in a paper form) consolidated invoices: a) for the total cost of the Services of Rostelecom, rendered to the population during the reporting period; b) for the aggregate prepayments received from the individual user within the period under review on account of the rendering of the services by  Rostelecom.  In line 6 of such invoices the client name “Population” is indicated, and lines 6 a and 6 b are not filled.  For the registration in the purchase book the Operator draws up a similar invoice for the sum of the prepayment received for the services of Rostelecom from the population, on account of which the services of Rostelecom were rendered in the reporting period.

To facilitate the signing of invoices for the Users for the services rendered by Rostelecom on behalf of Rostelecom, Rostelecom issues a power of attorney for the right of signing of invoices on behalf of Rostelecom to the Operator’s employees in accordance with the lists provided by the latter.

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The Operator draws up reports in respect of the services of Rostelecom, the reports for the formation of sales and purchase logs by Rostelecom.  The reports for the formation of sales and purchase logs are drawn up in accordance with the Regulations of keeping log books of the received and composed invoices, sales and purchase logs by the adjustment of VAT, approved by the Governmental Regulation of the Russian Federation PΦ No.914 of 02.12.2000, taking into consideration the specified details.

The Report for the formation of the sales log is drawn up in accordance with Form 1.

In the Report for the formation of the sales log the Operator registers the invoices for the services of  Rostelecom, rendered to the Users during the reporting period, as well as the invoices for the prepayment received from the Users during the reporting period on account of the rendering of the services of Rostelecom.  Besides, the Operator registers in the Report for the formation of the sales log the consolidated invoice for the cost of the services of Rostelecom, rendered to the population during the reporting period  and the sum of the prepayment received from the Users during the reporting period on account of the rendering of the services of Rostelecom (see above). By the registration of such invoices in column 2 the client name “Population” is indicated, and columns 3, 3a, 3b of the Report are not filled.  As regards the cost of the services of Rostelecom and the sum of the prepayment on account of the rendering of the services of Rostelecom, that were included into the consolidated invoices registered in the Report for the formation of the sales log, the Operator draws up a Register according to Form 2 (at that, the sums included into the Register are assigned the numeration of the corresponding invoices).

The Report for the formation of the purchase log is drawn up in accordance with Form 3.

In the Report for the formation of the purchase log the Operator registers the invoices for the prepayment for the services of Rostelecom, on account of which the services of Rostelecom were rendered during the reporting period.  Besides, the Operator registers in the Report for the formation of the purchase log the consolidated invoice for the prepayment for the services of Rostelecom received from the population, on account of which the services of Rostelecom were rendered during the reporting period (see above).  By the registration of such invoices in column 5 of the Report the seller name “Population” is indicated, and columns 3-4, 5a, 5b, 6 of the Report are not filled.  As regards the prepayments included into the consolidated invoice registered in the Report for the formation of the purchase log, the Operator draws up a Register according to Form 4.

Every month, the Operator must present to Rostelecom the following documents:

·                  The Report for the formation of the sales log for the month under review (according to Form 1).  The Report is presented in paper form (paper-bound, signed by the Director and Chief Accountant of the Operator) and in the electronic form  (in the format DBF DBASE IV);

·                  The Report for the formation of the purchase log for the reporting month (according to Form 3).  The Report is presented in paper form (paper-bound, signed by the Director and Chief Accountant of the Operator) and in the electronic form  (in the format DBF DBASE IV);

·                  The Registers of the Services of Rostelecom and the prepayments included into the consolidated invoices registered in the Reports for the formation of the sales and purchase logs in the reporting month (according to Forms 2 and 4).  The Registers are presented in the electronic form (in the format DBF DBASE IV).

All the indicated documents are drawn up and presented covering the activity of the Operator as a whole.

The Reports for the formation of the sales and purchase logs are presented no later than the 18^th day of the month following the reporting month.  The Registers of the Services of Rostelecom and the prepayments included into the consolidated invoices are presented no later than the 20^th day of the third month following the reporting month.

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2.             The order of the application to the rendering of the services of the 0% VAT rate and the presentation of the documentation proving the validity of the application of the 0% VAT rate

In accordance with paragraph 7 entry 1 of article 164 of the Tax Code of the Russian Federation the 0% VAT rate is applied by the rendering of the services of Rostelecom for the official use by the international diplomatic and equated to them representatives or for personal use by the diplomatic or administrative and technical personnel of these representative offices, including the resident family members, provided the law of the corresponding foreign country establishes the similar order in relation to the diplomatic and equated to them representative offices of the Russian Federation and their employees or if the similar form is indicated in the international agreement of the Russian Federation.

At the time of the conclusion of the present agreement the list of the countries in relation to the  diplomatic representative offices and employees of which the 0% VAT rate is applied, is established by the Letter of Ministry of Taxation and Charges  of the Russian Federation No.P-6-23/382 of 01.04.2003 (with amendments).  If after the conclusion of the present Agreement the Letter of MTC of the Russian Federation No.P-6-23/382 of 01.04.2003 is cancelled, in order to determine the list of the countries in relation to the diplomatic representatives and employees of which the 0% VAT rate should be applied, other duly approved and valid documents establishing the indicated list should be used.  The possibility of the application of the 0% VAT rate to the foreign diplomatic representative office is determined in accordance with the list valid at the day of the rendering of the services of Rostelecom.

The 0% VAT rate is applied only in relation to the services rendered to the diplomatic and equated to them representatives by the subscriber numbers indicated in the agreement on the rendering of the long-distance and international telecommunications between Rostelecom (concluded by the Operator on behalf of Rostelecom) and the diplomatic representative office.

The 0% VAT rate is applied exceptionally on the condition of the presentation by the diplomatic and equated to them representative office to the Operator of an official letter of the representative (signed by the head of representative office or the substitute, sealed by the stamp of the representative office in question), confirming that the services of Rostelecom are intended for the official use by the representative offices or their employees.

The letter must contain the following phrase: “This is to confirm that the long-distance and international telecommunications rendered by OAO Rostelecom (▇▇▇▇▇▇▇▇▇▇▇▇ ▇▇. ▇, ▇▇▇▇▇▇, ▇▇▇▇▇▇) according to the public agreement No.             dt.                                    by the list of subscriber numbers given below are intended for the official use by the representative office”.  The letter must contain the list of the subscriber numbers by which the services of Rostelecom are rendered, in relation to which the 0% VAT rate is applied, in the format:   (code ABC, DEF) (subscriber number).

The Operator is obliged to provide the storing of the original of the indicated letters during the period of three years starting from the date of the end of the year in which the services of Rostelecom were rendered, and the presentation of these originals to Rostelecom in case of necessity.

In the case of the application of the 0% VAT rate the Operator must draw up the invoice for the diplomatic and equated to them representative office, indicating the fact of the rendering of the services of Rostelecom with the application of the 0%, VAT rate, with the ▇▇▇▇ “for diplomatic use”.

By non-performance of the application of the aforementioned conditions the Operator should apply to the rendering of the services of Rostelecom to the diplomatic and equated to them representative office of the 18% VAT rate.

In accordance with the Regulations of the application of the zero VAT rate by the selling of goods (works, services) for the official use by the foreign diplomatic and equated to them representative offices or for personal use by the diplomatic or administrative and technical employees of these representative offices, including the resident family members, established by the Governmental Regulation of the Russian Federation No.1033 of 30.12.2000, in order to

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prove the validity of the application of the 0% VAT rate in relation to the services of Rostelecom, rendered to the diplomatic and equated to them representative offices during the reporting period, the Operator must present to Rostelecom:

·                  The Register of the Services by the rendering of which the 0% VAT rate was applied (hereinafter — Register), according to Form 5;

The Register is presented in paper form, signed by the Director and Chief Accountant of the Operator, as well as in the electronic form (format DBF DBASE IV).

·                  The copies of the letters of the diplomatic and equated to them representative offices listed in the Register, drawn up as indicated above and confirming that the Services of Rostelecom are intended for the official use by the representative office or their employees;

·                  The copies of the invoices indicated in the Register, in which it must be indicated that the Services of Rostelecom were rendered with the application of the 0% VAT rate, with the ▇▇▇▇ “for diplomatic use”;

·                  The copies of the agreements with the diplomatic and equated to them representative offices listed in the Register, concluded by the Operator on behalf of Rostelecom for the rendering of the Rostelecom Services.

All the indicated documents are drawn up and presented covering the activity of the Operator as a whole.

The indicated documents are presented by the Operator no later than the 14^th day of the month following the reporting month.

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Form 1

The Report for the formation of the sales log

* - the columns are not filled.

** - the indication 01 is used only for the registration in the sales log of the invoices for the prepayments received on account of the rendering of the services.  By the registration of the invoices for the services, the payment for which was performed as prepayment, the indication 02 is used.

*** - the indication is used for the registration in the sales log of both the invoices for the services liable to taxation at the 0% VAT rate, and the invoices for the prepayments received on account of the rendering of the services liable to taxation at the 0% VAT rate.

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The description of the fields for the DBF file

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Form 2

Register of the Services of Rostelecom and the prepayments on account of the rendering of the Services of Rostelecom, included into the consolidated invoices, registered in the sales log for

- the indication 01 is used only for the prepayments received on account of the rendering of the services. By the registration of the invoices for the services, the payment for which was performed as prepayment, the designation 02 is used.

The description of the fields for the DBF file

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Form 3

The Report for the formation of the purchase log