[asterisk-users] problem with asterisk - calls where both sides cannot hear each other

[Kyle Sexton]

On Tue, Dec 05, 2006 at 04:22:35PM -0500, Singer Wang wrote:
> Hi,
> 
> I'm looking for some help with a problem in Asterisk (possibly), and I'm
> confused as heck what is going on. I've updated to the latest Asterisk
> version and the problem is still occur. My setup is as follows:
> 
> I've got Asterisk running on a high end Pentium-IV box running Linux
> serving 5 calls, it is located in Canada. The calls come in via analog
> lines through TDM400P cards to Asterisk box, which then converts it to
> G729 channels to a call center in India over the Internet. Connection
> between the Asterisk Server and the India call center is done via two
> Cisco PIX501 devices, The call center in India is running 5 agents using
> PolyCom phones, and we're using G729 to save bandwith. And yes, we
> purchused 5 licenses of G729 codec.
> 
> We're using SIP and a ring all strategy, with the first agent that picks
> up getting the call. The problem we're having is that about 5-10% calls
> are not connecting properly. In that both sides can talk but do not hear
> each other. Since we have recording in step s,5 (in the configuration
> below), I can verify that it is happening. In these problematic calls,
> both sides of the call talk but they cannot hear the other side at all.
> 
> I've gone through most of the documentation and spend hours on Google
> search, does anyone have any idea what could be the problem? I'm willing
> to provide more information if asked. 
> 
> 
> My extensions configuration is roughly the following:
> 
> [opened]
> exten => s,1,SetVar(LOOP=1)
> exten => s,2,Answer
> exten => s,3,Wait(1)
> exten => s,4,Background(open-hiq)
> exten =>
> s,5,SetVar(MONITOR_FILENAME=/var/spool/asterisk/monitor/inbound/SUPPORT-${UNIQUEID})
> exten => s,6,Queue(support||||3600)
> exten => s,7,Voicemail(100|us)
> 
> exten => 1,1,Goto(opened,s,6)
> 
> exten => 500,1,Voicemail(500)
> 
> 
> thanks,
> Singer Wang
> 

Have you made sure there isn't a firewall in the way that could be blocking
your audio?  You might need to punch some holes through to allow your RTP
stream.

--
Kyle Sexton