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Cisco Bug: CSCta17274 - CFNA with no answer gets 500 responses

Last Modified

Aug 16, 2016

Products (1)

  • Cisco BTS 10200 Softswitch

Known Affected Releases

5.0(0)

Description (partial)

Symptom:
CFNA with no answer gets a 500 response to re-invites. 

Conditions:
Customer has 2 BTSs. On a BTS switch called BTS-B residential
subscriber with the CFNA and UCID features. The residential subs did not answer the call, but BTS failed to forward the call to voice mail.   
The root cause is that BTS does not fully support receiving re-INVITE from the terminating switch in a CFNA scenario. When the call was forwarded to VM, the BTS-B switch sent a re-INVITE back to the BTS-A switch via SRP, but the BTS-A switch couldn't set up the gate for the re-INVITE
and thus disconnected the call by sending a 500 to the CDV switch.
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