**Exhibit 4.24.2**

**Additional Agreement No. 2to contract on network connection between OAO Rostelecom and Sibirtelecom No. 1-01 dated August 1, 2003**
|          Moscow |   | March 9, 2006 |
|-----------------------------------------------|--------|--------------------|

 

This Agreement is entered into by and betweenRostelecom, Open Joint-Stock Company for Long-Distance and InternationalTelecommunications, hereinafter, “Rostelecom”, represented by OAO RostelecomGeneral Director Dmitry Yevgenievich Yerokhin, authorized to act by Charter, onthe one part, and OAO Sibirtelecom, hereinafter referred to as the “Operator”,represented by General Director Analoly Ivanovich Nikulin, authorized to act byCharter, on the other part, hereinafter collectively referred to as the “Parties”,and separately referred to as “Party” signed this Additional Agreement(hereinafter — Agreement) on the following additions to Appendix 9  to the Contract on Network Connection(hereinafter — Contract):

1.                               Tables“Details of recipient of the bill (Subscriber)” and “Subscribers’ Numbers(Phone)”  are changed by the tables ofthe following wording for the term of this Agreement:

**Details of recipient of thebill (Subscriber)**
| **Attribute name** | ** ** | **Obligation degree**            | ** ** | **Acceptable values**                                                                                                | ** ** | **Description**                                                             |
|--------------------|------------|----------------------------------|------------|----------------------------------------------------------------------------------------------------------------------|------------|-----------------------------------------------------------------------------|
| subscriber_id      |       | Obligatory given  as a parameter |       | Symbol line of  15 digits                                                                                            |       | The unique  identifier of the Subscriber within the Operator’s company |
| legal_entity       |       | All subscribers                  |       | 0-Individuals  1-legal entity                                                                                        |       | Feature of a  legal entity                                                  |
| category           |       | All subscribers                  |       | 0-Budgetary  organizations  1-Self-sustained organizations  2-population  3-Non-incorporated individual entrepreneur |       | Type of  subscriber                                                         |

 

**Subscribers’ Numbers (Phone)**
| **Attribute name** | ** ** | **Obligation degree**            | ** ** | **Acceptable values**                                                             | ** ** | **Description**              |
|--------------------|------------|----------------------------------|------------|-----------------------------------------------------------------------------------|------------|------------------------------|
| phone_number       |       | Obligatory given  as a parameter |       | Line of 10  characters (figures only)                                             |       | Full subscriber  number      |
| device             |       | All subscribers                  |       | 0-telephone  1-call office                                                        |       | Type of the  subscriber gear |
| price_plan         |       | All subscribers                  |       | 0-office  1-population  2-Self-sustained organizations  3-Budgetary organizations |       | Tariff                       |

 

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| vat_free |   | Diplomatic  mission or their employees |   | 0-default  VAT rate  1-0% VAT rate |   | The sign of 0%  VAT rate application to the realization of the services |
|----------|--------|----------------------------------------|--------|------------------------------------|--------|-------------------------------------------------------------------------|

2.                             Tables“Banking requisites” and “Addresses” are not filled out and are nottransferred.

3.                             Informationstructure provided by the Agreement is used for the transfer.

4.                             ThisAgreement is an inseparable part of the Contract.

5.                             Allterms used in this Agreement have a meaning, fixed for them in the Contract.

6.                             Allthe rest, not indicated in this Agreement, is subject to the provisions of theContract.

7.                             Theagreement is issued in the Russian language in two copies, one for  each Party.

8.                             TheAgreement enters into force from the date of its conclusion and remains inforce until 01.04.2006. If neither Party announces termination of thisAgreement within thirty (30) calendar days before its stated expiration, thisAgreement shall be automatically extended for each subsequent period of threecalendar months. The number of periods for which the effect hereof can be prolongedis not limited. The Parties agree that terms and conditions of the Agreemententered into by them apply to their relations that arose from the date ofmaking the Contract on network connection in the version dated December 28,2005.

9.                             Afterthe termination of this Agreement in Appendix 9 to the Contract the Tables “Detailsof the recipient of the bill (Subscriber)” and “Subscribers’ Number Data” shallbe applied in the wording of Appendix 9, existing on the day previous to theday when this Agreement enters in force.

10.                       Detailsand Signatures of the Parties
| OAO Rostelecom:               |   | OAO Rostelecom:               |
|-------------------------------|--------|-------------------------------|
|                          |   |                          |
|                          |   |                          |
| General Director              |   | General Director              |
|                          |   |                          |
|                          |   |                          |
| /signed/  D.Ye. Yerokhin |   | /signed/  D.Ye. Yerokhin |
|                          |   |                          |
| March 9, 2006            |   | March 9, 2006            |
|                          |   |                          |
| Seal here                     |   | Seal here                     |

 

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