Cisco Bug: CSCvs54640 - SIP Phone plays ringback tone and displays as Busy in Secure/None Secure Calls
Jan 21, 2020
- Cisco Unified Communications Manager (CallManager)
Known Affected Releases
Symptom: Phone plays ringback tone instead of busy tone whenever we receive 183 session progress followed by 486 for the Delayed Offer sent out. Conditions: When we send out a Delayed Offer to side B.
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Bug Details Include
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