**Exhibit 4.27.4**

**AdditionalAgreement No. 4to Contract on Network Connection between OAO Rostlecom and OAO UralsvyazinformNo. UF/D-MRK-01/03 dated August 01, 2003 (as amended by Agreement dated January 01,2006)**
|          Moscow |   | March 11, 2006 |
|-----------------------------------------------|--------|---------------------|

** **

**Rostelecom, Open Joint-Stock Company forLong-Distance and International Telecommunications**,hereinafter, “Rostelecom”, represented by OAO Rostelecom General Director **Dmitry Yevgenievich Yerokhin**, authorized to act by Charter,on the one part, and **Open Joint Stock Company“Uralsvyazinform”**, hereinafter referred to as the “Operator”,represented by General Director **AnatoliyYevgenievich Ufimkin**, authorized to act by Charter, on the otherpart hereinafter collectively referred to as the “Parties”, and severally, as “Party”,have entered into this Additional Agreement (hereinafter, “the Agreement”) onthe incorporation of the below-listed amendments in the Contract on NetworkConnection (hereinafter, “the Contract”), as follows:

1.                    Clause **1.12** of the Contract — to be excluded.

2.                    Clause**1.13** of the Contract shall be marked as Clause 1.12. andshall be amended as follows:

**“TrafficAdmission Services” **collectivelymean termination of call to the Associated Operator’s network; zone terminationof call to the Operator’s network; zone initiation of call; zone initiation ofcall from the Associated operator’s network in the course of long-distance andinternational communication provided by Rostelecom to the Users”.

### 3.                    In Paragraphs3.3.3., 4.10, of the Contract, the term “long distance” shall be replaced bythe term “zone”.

### 4.                    The words “andlocal termination of calls to the Operator’s network” shall be excluded fromParagraph 4.10.

### 5.                    In clause **5.6.** of the Contract the reference onclause 1.13. of the Contract shall be substituted by reference on clause 1.12.of this Contract

6.                    In eachAppendix to the Contract, the words «service on local termination of calls”shall be excluded; the words “long distance termination of calls” and “longdistance initiation of calls” shall be substituted by the words “zonetermination of calls” and “zone initiation of calls”, respectively; the words “serviceon transit of calls” shall be substituted by the words “service on zoneinitiation of calls from the networks of the Associated Operators”.

7.                    This Agreementis an inseparable part of the Contract.

8.                    All terms usedin this Agreement have a meaning, fixed for them in the Contract.

9.                    All the rest,not indicated in this Agreement, is subject to the provisions of the Contract.

10.              The agreement isissued in the Russian language in two copies, one for  each Party.

11.              This Agreement shallcome into force from the date hereof. The Parties hereby establish that termsand conditions of the Agreement entered into thereby shall apply to theirrelations arisen from the date of the Contract on Telecommunications NetworkConnection dated January 01, 2006.

12.              Details andSignatures of the Parties
| **OAO Rostelecom:**            | ** ** | **OAO Uralsvyazinform:**            |
|--------------------------------|------------|-------------------------------------|
|                           |       |                                |
| Legal address: 127091, Moscow, |       | Legal address: 620014               |
| Delegatskaya st., 5            |       | Yekaterinburg, Moskovskaya  st., 11 |
|                           |       |                                |
| **General Director**           |       | General Director                    |
| OAO Rostelecom                 |       | OAO Uralsvyazinform                 |
|                           |       |                                |
| /signed/ D.Ye. Yerokhin        |       | /signed/ A. Ya. Ufimkin             |
| Dated 11.03.2006               |       | Dated 11.03.2006                    |
| Seal here                      |       | Seal here                           |

 

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