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Cisco Bug: CSCus85518 - 88XX phone can't register if more than 5 lines in phone button template

Last Modified

Jul 17, 2018

Products (35)

  • Cisco IP Phone 8800 Series
  • Cisco Unified IP Phone 9951
  • Cisco IP Phone 8851
  • Cisco Unified IP Phone 7945G
  • Cisco Unified SIP Phone 3905
  • Cisco Unified IP Phone 7962G
  • Cisco IP Phone 7841
  • Cisco Unified IP Phone 6961
  • Cisco Unified IP Phone 7941G
  • Cisco Unified IP Phone 6941
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Known Affected Releases

10.2(1) 10.2(2) 10.3(1)

Description (partial)

8841 or other 88XX phone model that doesn't support a Key Expansion Module will show "Unprovisioned" or "Telephony Service Unavailable" and fail to register to Unified Communications Manager (UCM).

This issue only occurs if the Phone Button Template assigned to the device in UCM has more than 5 lines assigned to it.  The 8841 and 8811 phones only support a maximum of 5 lines and will reject the xml configuration file from UCM if more than 5 lines are present.

Related Community Discussions

Telephony service is unavailable - IP Phone model 8851
Hi Guys,   The site is having in the IP Phones randomly the error message "Telephony service is unavailable". I don´t have sure, but, my suspect is related the network error. Any have idea about this?   Thanks,    Wilson 
Latest activity: Oct 30, 2018
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