[asterisk-bugs] [JIRA] Commented: (ASTERISK-20183) Intermittent audio

[Matt Jordan (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-20183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=195398#comment-195398 ] 

Matt Jordan commented on ASTERISK-20183:
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Looking at Igor's eth0.pcap:

1. The SIP peers were configured to have ICE support enabled.  This can be disabled on a peer by peer basis.  That being said, since the UAC negotiated the SIP session successfully in the presence of ICE candidates, I don't think this is causing any problems.

2. The SIP dialog negotiated media for 10.10.11.201:13122, and on 10.10.11.203:12668.  I don't know UNISTIM very well, but it appears as if it was sending its media between 10.10.11:203:11582 and 10.10.11.34:10001.

3. For every RTP packet that was sent along the stream negotiated by the UNISTIM channel from 10.10.11.34 to 10.10.11.203, there is a corresponding ICMP packet denoting that the destination port is unreachable.  This would be port 11582.  Since this is at the network layer and independent of Asterisk, I would guess its either a network configuration error, or an error configuring chan_unistim.

4. I don't see any corresponding ICMP destination unreachable packets for the RTP stream between 10.10.11.201 and 10.10.11.203 (the stream negotiated by SIP).

It appears as if there is something blocking a port in the RTP stream negotiated by chan_unistim, or the port that was negotiated was incorrect.

> Intermittent audio
> ------------------
>
>                 Key: ASTERISK-20183
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20183
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/General
>    Affects Versions: SVN
>         Environment: CentOS 5 i386 HP DL380 G3
>            Reporter: Jonn Taylor
>         Attachments: eth0.pcap, Nortel.txt, one-way6.pcap, oneway-audio6.txt
>
>
> Intermittent audio on incoming and out going calls.

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