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Cisco Bug: CSCvs54640 - SIP Phone plays ringback tone and displays Busy in Secure/None Secure Calls

Last Modified

Jul 21, 2020

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases

11.5(1.10000.6) 12.0(1.10000.10) 12.5(1.10000.22)

Description (partial)

Phone plays ringback tone instead of busy tone whenever we receive 183 session progress followed by 486 for the Delayed Offer sent out.

1)Delayed offer call
2) Received 183 session progress later 486
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  • Status
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