[asterisk-bugs] [JIRA] (ASTERISK-21690) Asterisk sends SIP 481 after REFER

[Peter Grace (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-21690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=206144#comment-206144 ] 

Peter Grace commented on ASTERISK-21690:
----------------------------------------

Hello Michael,

We tried some off-the-wall fixes and I believe I found what caused the issue.  Our Polycom's dialplan was arranged such that for some extensions, the number would begin sending after two digits.  The phone sent the two digits and then began sending digits-as-received.  The final extension that was entered was indeed correct, but for some reason we were getting the 481 at response to the REFER.  We changed the logic so that we send all 4 digits at once regardless of extension and the problem hasn't recurred.

If more information is required beyond what's already been posted, let me know -- I can try to get more debug information later this week.
                
> Asterisk sends SIP 481 after REFER
> ----------------------------------
>
>                 Key: ASTERISK-21690
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-21690
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/Transfers
>    Affects Versions: 1.8.15.1
>         Environment: Server is Dell PowerEdge R610 running CentOS 6.4
> Phones are Polycom VVX600's with the following software versions:
> Platform: Model=VVX 600, Assembly=3111-44600-001 Rev=A Region=0
> Platform: Board=3111-44600-001 3 0
> Platform: MAC=0004f2aef0ff
> Platform: BootBlock=3.0.4.0061 (44600-001) 13-Sep-12 09:09
> Platform: BootL1=1.0.0.0041 (44600-001) 13-Sep-12 10:01
> Application, main: Label=Updater, Version=Peridot 5.1.2.0651 07-Nov-12 21:44
> Application, main: P/N=3150-11069-512
>            Reporter: Peter Grace
>            Severity: Minor
>         Attachments: 8287-20130426-TransferFailedButSucceeded-debug.txt, 8287-20130426-TransferFailedButSucceeded.pcap, 8289-DebugLog.txt, 8289FailedTransfer.pcap, petebart-blind-combined.pcap
>
>
> Frequently when our users are attempting to transfer a call, their transfer will fail.  One of the instances of the failure is shown in the attached pcap.  I am confused as to how the 481 is being produced since the code comment (and ticket #17521 seems to reiterate) that this only occurs if the call legs are not found, however both Call-ID's described in the REFER exist.  I don't see any debug information in the debug log that hints at why I'm getting a 481.

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