[asterisk-bugs] [JIRA] (ASTERISK-27308) res_pjsip_t38: Faxing does not work under FreeBSD

[Michael Maier (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-27308?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=244101#comment-244101 ] 

Michael Maier commented on ASTERISK-27308:
------------------------------------------

Same problem happens in Linux using CentOS 6 and asterisk 13.22.rc1 (and probably earlier). It happens, if the following situation takes place (see attached screenshot):

- inbound fax
- t.38 udptl is activated on the incoming trunk
- the fax device sends a t.38 reinivte
- but the peer doesn't answer with 488 not accepted
- instead the peer sends an INVITE "g711"
.... (see screenshot)
- fax reception is broken from that point.


> res_pjsip_t38: Faxing does not work under FreeBSD
> -------------------------------------------------
>
>                 Key: ASTERISK-27308
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-27308
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_pjsip_t38
>    Affects Versions: 13.17.2
>         Environment: FreeBSD 11.1 amd64
>            Reporter: Anton Bulatov
>            Assignee: Unassigned
>            Severity: Minor
>         Attachments: t38_debug.txt, t38.pcap, udpl.txt
>
>
> When using pjsip t.38 fax stops working (with chan_sip it is fine). In console i get this message:
> NOTICE[101875][C-00000002]: udptl.c:1189 int ast_udptl_write(struct ast_udptl *, struct ast_frame *): UDPTL (PJSIP/rc_endpoint-00000002): Transmission error to 195.224.28.2:4813: Invalid argument



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