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




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