[asterisk-bugs] [JIRA] (ASTERISK-28036) Codec negotiation when incoming re-INVITE has no SDP

[Daniel Harper (JIRA)]

Daniel Harper created ASTERISK-28036:
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             Summary:  Codec negotiation when incoming re-INVITE has no SDP
                 Key: ASTERISK-28036
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-28036
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Channels/chan_pjsip
    Affects Versions: 15.5.0, 13.22.0
         Environment: Centos 6.10, 64bit
            Reporter: Daniel Harper
            Severity: Minor


I appreciate that there might be a view that this is a feature request but I also believe that it could be also be viewed that this is a bug but I welcome the discussion.

When recieving an re-Invite without SDP asterisk is not re-offering all supported media formats & codecs only the previously determined one.

I found this link that references the various RFC's where this behaviour is expected. 

Where this is an issue is in a call-pick up scenario where asterisk is dialing a call-pick feature code to pick up a external call. The issue being that the call being picked might not support the originally determined codec.





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