Cisco Bug: CSCtd17854 - PGW doesn't forward 491 response to originating leg leading to no audio
Feb 07, 2017
- Applications for Cisco Unified Application Environment
Known Affected Releases
Symptom: One-way audio followed by the call dropping or no audio followed by the call dropping. Conditions: Occurs in a specific call flow where Cisco Unified CM is connected to the PGW via a SIP trunk and the PGW is connected to a service provider using SIP. The call flow that causes the problem is an attended transfer between two call legs from the PSTN where the originators of both of those call legs are also coming from phones attached to a Unified CM.
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Bug Details Include
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