**Exhibit 4.27.6**

**AdditionalAgreement No. 6to Contract on Network Connection between OAO Rostlecom and OAO UralsvyazinformNo. UF/D-MRK-01/03 dated August 01, 2003 (as amended byAgreement 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 separatelyreferred to as “Party” signed this Additional Agreement (hereinafter —Agreement) on the following amendments to Clause 4.7 of Appendix 0.4  (version No. 0.7) to the Contract onNetwork Connection (hereinafter — Contract):

1.               Clause **4.7.** of the Contract shall be amended as follows: The entirerelationship of the Parties hereunder shall be subject to the confidentialityterms and conditions as set forth in the Confidentiality Agreement No. ____________entered into by the Parties on                      .

Any exchange of informationbetween the Parties hereunder shall be in a manner which shall allow for it tobe kept in confidence in accordance with the Confidentiality AgreementProvisions.

2.               This Agreement isan inseparable part of the Contract.

3.               All terms used inthis Agreement have a meaning, fixed for them in the Contract.

4.               All the rest, notindicated in this Agreement, is subject to the provisions of the Contract.

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

6.               This Agreementshall come into force from the date hereof. The Parties hereby establish thatterms and 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.

7.               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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