[asterisk-bugs] [JIRA] (ASTERISK-28982) t38gateway with pjsip does not resume alaw after t38 negitiation fails

[Christian Berger (JIRA)]

Christian Berger created ASTERISK-28982:
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             Summary: t38gateway with pjsip does not resume alaw after t38 negitiation fails
                 Key: ASTERISK-28982
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-28982
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: pjproject/pjsip, Resources/res_fax
    Affects Versions: 16.11.1, 13.32.0
            Reporter: Christian Berger


We operate Asterisk as a B2Bua in our network. It's task is to transcode, write CDRs and act as a T38 gateway. We are currently trying to move over to PJSIP from the legacy SIP stack.

We have noticed the following potential bug: When T38 is negotiated on a call leg, voice traffic to it will stop. However even if T38 is rejected it will not send anything via RTP.

This issue sounds like ASTERISK-28441, however the patch there does not appear to change the problem. In fact the changed function does not seem to be called at all.
We have, however, found one potential bug in t38_fallback_response_cb. Provisional Response codes 1xx are handled as failures. However this doesn't seem to solve the problem.




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