origCallTerminationOnBehalfOf and destCallTerminationOnBehalfOf 17

[msasala]

At one of our offices the users are saying they have having calls drop randomly, taking a quick look at the CDR's both the orig and dest CallTerminationOnBehalfOf have codes of 17. Any idea's what could cause this?

[ardugar]

Hello , 

origCallTerminationOnBehalfOf = 17 corresponds to call termination due REFER. 

Refer to this document for the same : 

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/service/8_5_1/cdrdef/cdradmin/cdrcodes.html#wp1063129

If your regular call flow involves redirecting to other parties via transfers , maybe you can see origCallTerminationOnBehalfOf = 17.  

Analysis of Cisco call manager traces would be required in order to find exact cause for call drops.