Hi Mohamed,

You can access Cisco Unified Communications Operating System Administration directly by entering the following URL:

http://server-name/cmplatform

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Enter your Administrator username and password.

Restart Current Version

To restart the system on the current partition without switching versions, follow this procedure:

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Caution This procedure causes the system to restart and become temporarily out of service.

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Procedure

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Step 1 From the Cisco Unified Communications Operating System Administration window, navigate to Settings> Version.

The Version Settings window displays, which shows the software version on both the active and inactive partitions.

Step 2 To restart the system, click Restart, or to stop the operation, click Cancel.

If you click Restart, the system restarts on the current partition without switching versions.

http://www.cisco.com/en/US/docs/voice_ip_comm/cucmbe/cucos/6_0_1/cucos/iptpch5.html

Hope this helps!

Rob