asterisk users - May 2013 - debug strategy for one-way audio calls

Hello everybody,

from time to time, we get so-called simplex / one-way audio calls, where one
party cannot hear the other. The only thing in common is that is does happen
with calls via SIP trunk, not ISDN and not internal calls. Nothing strange in
verbose and SIP logs. Could even be some weird intermittent firewall issue I
guess.

Apart from logging all traffic 24/7 via tcpdump (not really convenient), can you
give me some ideas how to debug this kind of issue?

Asterisk 1.8.11-cert10 on CentOS 6.3, if that matters.

-- 
Thanks,

marie

2013-05-02 13:19, Marie Fischer skrev:
> Hello everybody,
> 
> from time to time, we get so-called simplex / one-way audio calls, where
one party cannot hear the other. The only thing in common is that is does happen
with calls via SIP trunk, not ISDN and not internal calls. Nothing strange in
verbose and SIP logs. Could even be some weird intermittent firewall issue I
guess.
> 
> Apart from logging all traffic 24/7 via tcpdump (not really convenient),
can you give me some ideas how to debug this kind of issue?
> 
> Asterisk 1.8.11-cert10 on CentOS 6.3, if that matters.
> 
Voipmonitor.org is great for debugging voip. You can either use only the
sniffer (opensource) and use mysql + the pcap files or you can also buy
the commercial webgui. Either way, it's a great product.

/Johan

Le 2 mai 2013 13:23, "Marie Fischer" <marie at vtl.ee> a ?crit
:
>
> Hello everybody,
>
> from time to time, we get so-called simplex / one-way audio calls, where
one party cannot hear the other. The only thing in common is that is does
happen with calls via SIP trunk, not ISDN and not internal calls. Nothing
strange in verbose and SIP logs. Could even be some weird intermittent
firewall issue I guess.
>
Which audio flow is missing ? Inbound ?

I suppose it should be easier to automatically detect missing inbound audio.
> Apart from logging all traffic 24/7 via tcpdump (not really convenient),
can you give me some ideas how to debug this kind of
issue?
>
> Asterisk 1.8.11-cert10 on CentOS 6.3, if that matters.
>
> --
> Thanks,
>
> marie
>
>
>
>
> --
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