[asterisk-bugs] [JIRA] (ASTERISK-27657) T.38 from ATA fails with hangupcause 58(Bearer capability not available)

[George Joseph (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-27657?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

George Joseph updated ASTERISK-27657:
-------------------------------------

    Assignee: Jared Hull
      Status: Waiting for Feedback  (was: Triage)

Can you attach the pcap?

> T.38 from ATA fails with hangupcause 58(Bearer capability not available)
> ------------------------------------------------------------------------
>
>                 Key: ASTERISK-27657
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-27657
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_fax, Resources/res_pjsip_t38
>    Affects Versions: 15.2.0
>            Reporter: Jared Hull
>            Assignee: Jared Hull
>              Labels: fax, pjsip
>         Attachments: t38.log
>
>
> Sending a T.38 fax from an ATA is failing with hangup cause 58(Bearer capability not available) on Asterisk 15.2, but the same device and dialplan on Asterisk 14.6 works.
> There are several strange things in the log:
> # {{pjsip set logger on}} reports some duplicate T.38 re-INVITEs being recieved from the ATA, but a packet capture on the Asterisk server and a pcap on the SBC server relaying to the Asterisk server show that only one INVITE is there. It also looks like Asterisk is processing both
> # Sometimes Asterisk sends {{491 Another INVITE transaction in progress}} in response to the T.38 re-INVITE from the ATA.
> # 109 is the ATA requesting T.38, I don't know what this means.
> {noformat}[Feb  5 17:39:01] DEBUG[7126][C-0000001d]: res_fax.c:3275 fax_gateway_detect_t38: T.38 disabled on channel PJSIP/109-00000060{noformat}
> # Asterisk 15.2 sends an INVITE back to the ATA after receiving the ACK, but Asterisk 14.6 does not (because it has begun the fax transmission by this point).
> {noformat}[Feb  5 17:39:01] DEBUG[10811]: res_pjsip_session.c:1664 ast_sip_session_refresh: Sending session refresh SDP via re-INVITE to 109{noformat}



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