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

Last Modified

Jan 21, 2020

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases


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.

When we send out a Delayed Offer to side B.
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