[asterisk-bugs] [JIRA] (ASTERISK-22031) Asterisk responds 488 to session timers re-Invite in an active T.38 dialog after exactly 5 seconds

[Matt Jordan (JIRA)]

Matt Jordan created ASTERISK-22031:
--------------------------------------

             Summary: Asterisk responds 488 to session timers re-Invite in an active T.38 dialog after exactly 5 seconds
                 Key: ASTERISK-22031
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-22031
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Channels/chan_sip/T.38
    Affects Versions: 1.8.22.0
            Reporter: i2045


192.168.5.1 LAN IP address of client A
44.55.66.77 WAN IP address of client A
11.22.33.44 SIP proxy server
88.99.11.22 Asterisk 1.8.22.0 server
33.55.77.99 SIP server of client B
22.44.66.88 Media gateway of client B

- A call (G.711 alaw) is initiated by client A to client B.
- Client A re-Invites to T.38, Asterisk relays this re-Invite, client B accepts.
- Client B re-Invites (line #502). The only difference with the 200 OK that client B sent earlier (line #404) is the Session-Expires header. Asterisk responds immediately with "100 Trying" and "488 Not acceptable here" after exactly 5 seconds.
- The call is then re-Invited back to G.711 alaw and the fax fails.

Seems a similar problem as reported in 2010:
https://issues.asterisk.org/jira/browse/ASTERISK-15596?focusedCommentId=162618&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-162618

Does someone know why the second re-Invite is answered with a 488?

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.asterisk.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira