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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)

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:
1)Delayed offer call
2) Received 183 session progress later 486
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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  • Known Fixed Releases
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