Hi Fasalulla,
Your "idle-timeout" settings may be getting overridden by this system setting;
Cisco Unified CME 4.3 and later versions includes an Automatic Timeout feature for Extension Mobility. After an automatic logout is executed, Cisco Unified CME sends the logout profile to the phone and restarts the phone. After an automatic logout, Extension Mobility users can log in again.
You can configure up to three different times on a 24-hour clock for automatically logging out Extension Mobility users based on time-of-day. The system clock triggers an alarm at the specified time and the EM Manager in Cisco Unified CME logs outs every logged in Extension Mobility user in the system. If an Extension Mobility user is using the phone when automatic logout occurs, the user is logged out after the active call is completed.
em logout time1 [time2] [time3]
Example:
Router(config-telephony)# em logout 19:00 24:00
(Optional) Defines up to three time-of-day timers for automatically logging out all Extension Mobility users.
•This command is supported in Cisco Unified CME 4.3 and later versions.
•time-Time of day after which logged-in users are automatically logged out from Extension Mobility. Range: 00:00 to 24:00 on a 24-hour clock.
From this excellent doc;
http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/admin/configuration/guide/cmemobl.html#wp1148455
Hope this helps!
Rob
