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Cisco Bug: CSCui96679 - SBC No Way Audio on Transfer calls traversing more than two SIP trunks

Last Modified

Apr 17, 2019

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

15.1(3)S1

Description (partial)

Symptom:
On a Cisco ASR1k running the Cisco CUBE SP (Service Provider) feature set, IOS-XE version 15.1(3)S1, it is sometimes observed that a specific call transfer will have no way audio (dead air) upon the transfer completion.

Conditions:
The CUBE SP has at least three physical interfaces that terminate three different SIP trunks (for example to ITSP, SIP based IVR and to a Cisco Callmanager) and the problematic transfer call flow signaling traverses all three SIP trunks on the same CUBE.
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