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Cisco Bug: CSCvv48257 - J4W over MRA: both local ringback and remote media are heard if SIP 183 is followed by 180

Last Modified

Aug 27, 2020

Products (1)

  • Cisco Jabber for Windows

Known Affected Releases

12.8(2) 12.9(0)

Description (partial)

Symptom:
If SIP 183 Session in Progress with SDP is followed by 180 Ringing w/o SDP, Jabber for Windows will play both incoming media from remote end and local ringback.
Per RFC3960:
If a 180 (Ringing) has been received and there are incoming media packets, play them and do not generate local ringing.

Conditions:
J4W is registered over MRA;
183 Session in Progress with SDP is followed by 180 Ringing w/o SDP and there are incoming Early Media packets;
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Bug Details Include

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