[asterisk-bugs] [JIRA] (ASTERISK-25539) 488 Not acceptable here sent after T.38 re-invite accepted

[David Cunningham (JIRA)]

David Cunningham created ASTERISK-25539:
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             Summary: 488 Not acceptable here sent after T.38 re-invite accepted
                 Key: ASTERISK-25539
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-25539
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Channels/chan_sip/General
    Affects Versions: 1.8.22.0
         Environment: Debian 6.0.7, 64 bit.
            Reporter: David Cunningham


We have an issue where:

14:19:08 Fax machine makes call to Asterisk
14:19:08 Asterisk dials SIP termination provider
14:19:23 SIP termination provider accepts call
14:19:28 SIP termination provider sends T.38 re-invite
14:19:28 Asterisk sends T.38 re-invite to fax machine
14:19:28 Fax machine accepts re-invite
14:19:33 Asterisk appears to do nothing for 5 seconds and then sends "488 Not acceptable here" to SIP termination provider

This is in the attached Asterisk trace, where the call from the fax machine has ID BC3FB901-81AF11E5-8D388D32-AD053ED at BB.BB.46.68 and the call to the SIP termination provider has ID 026a9cbd104dbb311dc9963a05702766 at AA.AA.224.228:5060.

Could you please advise why after getting the 200 OK at 14:19:28 it takes 5 seconds for Asterisk to send the "488 Not acceptable here", and why the 488 is sent?

I notice there are a lot of "Bridge still active.  Delaying destroy of SIP dialog" messages relating this call, but I think they're harmless?

Thanks for your help.




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