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This update that is for Microsoft Lync Phone Edition updates time zones for Russia in Aastra 6721ip and Aastra 6725ip telephones. This update contains an image that can be installed on Aastra 6721ip and Aastra 6725ip telephones. The image version is 7577.4455. 

Updated time zones

This update adds the following new time zones for Lync Phone Edition for Aastra 6721ip and Aastra 6725ip telephones:

  • N/A (UTC+04:00) Izhevsk, Samara (RTZ3)

  • N/A (UTC+11:00) Chokurdakh (RTZ10)

  • Kamchatka Standard Time (obsolete) (UTC+12:00) Anadyr, Petropavlovsk-Kamchatsky

This update also updates the following time zones:

  • Kaliningrad Standard Time (UTC+02:00) Kaliningrad (RTZ1)

  • Russian Standard Time (UTC+03:00) Moscow, St. Petersburg, Volgograd (RTZ2)

  • Ekaterinburg Standard Time (UTC+05:00) Ekaterinburg (RTZ4)

  • N. Central Asia Standard Time (UTC+06:00) Novosibirsk (RTZ5)

  • North Asia Standard Time (UTC+07:00) Krasnoyarsk (RTZ6)

  • North Asia East Standard Time (UTC+08:00) Irkutsk (RTZ7)

  • Yakutsk Standard Time (UTC+09:00) Yakutsk (RTZ8)

  • Vladivostok Standard Time / Magadan Standard Time (UTC+10:00) Vladivostok, Magadan (RTZ9)

This update removes the existing UI entry for (GMT+12:00) Magadan, because Magadan is already covered in Vladivostok Standard Time / Magadan Standard Time.

Get the update KB3004836 for Lync Phone Edition for Aastra 6721ip and Aastra 6725ip

A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next update that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft website: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

How to install the update


There are no prerequisites for installing this update.

Restart requirement

You may have to restart the computer after you apply this update.

Update replacement information

This update does not replace a previously released update.

Registry information

To use one of the updates in this package, you do not have to make any changes to the registry.


For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

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