[asterisk-bugs] [JIRA] (ASTERISK-26201) Asterisk fails to re-activate an inactive media session (after remote HOLD)

[Rudi (JIRA)]

Rudi created ASTERISK-26201:
-------------------------------

             Summary:  Asterisk fails to re-activate an inactive media session (after remote HOLD)
                 Key: ASTERISK-26201
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26201
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Channels/chan_sip/General
    Affects Versions: 11.22.0
            Reporter: Rudi


1. Phone A (our PBX) calls Phone B (Broadworks) to establish a call
2. Phone B transfers (attendant transfer) a call to Phone C (Broadworks) and so puts call on hold until call is transferred
3. when Phone C is on the line there is only one way audio from Phone C to Phone A.

Examining SIP trace:
1. Start Hold - we receive ReInvite with sendonly and we reply with recvonly
2. We receive ReInvite with empty attribute and we answer with recvonly
3. We recieve ReInvite without SDP and we answer with sendrecv
4. End Hold - we receive ReInvite with empty attribute and we answer with sendrecv





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