[asterisk-bugs] [JIRA] (ASTERISK-21246) After RTP is negotiated (ALAW) between two SIP endpoints; Asterisk starts sending ULAW marker packets to both endpoints

[Michael L. Young (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-21246?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael L. Young updated ASTERISK-21246:
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    Attachment: asterisk-21246-rtp-cng-payload-error_1.8.diff

Peter, can you give this patch a try and see if this corrects the problem.  [^asterisk-21246-rtp-cng-payload-error_1.8.diff]

Thanks
                
> After  RTP is negotiated (ALAW) between two SIP endpoints; Asterisk starts sending ULAW marker packets to both endpoints 
> -------------------------------------------------------------------------------------------------------------------------
>
>                 Key: ASTERISK-21246
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-21246
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/General, Resources/res_rtp_asterisk
>    Affects Versions: 1.8.17.0, 1.8.18.0, 1.8.19.0, 1.8.20.1
>         Environment: ubuntu 10.04
>            Reporter: Peter Katzmann
>            Assignee: Rusty Newton
>         Attachments: asterisk-21246-rtp-cng-payload-error_1.8.diff, asterisk.conf.tar.gz, CallWithTranscoding, codecchange.0, codecchange.2, codecchange-24032013.bz2, codecchange-24032013-udp.pcap, codecchange.3, codecchange-filtered.pcap.gz, filtered1512-2-leg.pcap, filtered1512-2.pcap, myDebugLog, myDebugLog, negiot-switch, vanilla-trace.txt, ws-trace.txt
>
>
> See attached traces
> During call asterisk switches the negotiated codec (alaw) in the rtp to ulaw.
> If there is no renegotiation (like on my snom 720 sometimes), the user has a audible distortion.

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