[asterisk-users] One Way Audio Problem

[Tzafrir Cohen]

On Sun, Oct 12, 2008 at 11:53:18PM +0800, GNUbie wrote:
> Hello all,
> 
> I've been lobbying for some time at the #asterisk IRC channel. Until
> now, I still can't find a solution to my one way audio problem. I
> rebuilt the Asterisk-1.4.21.2 from the Debian Testing repository on my
> Debian Etch. I got a Digium TDM400P with 1 FXO (channel 4) and 1 FXS
> (channel 1). My SIP extension phone located inside the LAN is a SNOM
> 300 IP phone.
> 
> This one way audio problem only happens when the SIP extension phone
> (let's call it the CALLER) places an outbound call to a mobile phone
> or analog telephone (let's call it the CALLEE) via FXO/POTS. The
> CALLER can hear the CALLEE's voice but the CALLEE cannot hear the
> CALLER's voice. I used this command "ztmonitor 4 -vv -f /tmp/test.raw"
> to monitor the RX/TX but the TX is totally zero. Below is a sample
> output of the ztmonitor command:
> 
> - - - < s n i p > - - -
> 
> # ztmonitor 4 -vv -f /tmp/test.raw
> Output to /tmp/test.raw
> Run e.g., 'sox -r 8000 -s -w -c 1 /tmp/test.raw /tmp/test.raw.wav' to convert.
> 
> Visual Audio Levels.
> --------------------
>  Use zapata.conf file to adjust the gains if needed.
> 
> ( # = Audio Level  * = Max Audio Hit )
> <----------------(RX <----------------(TX
>  ###############*
>         Rx:   718 (  718) Tx:     0 (    0)

This means Zaptel gets silence from Asterisk.

What codecs are used? What do you see on 'sip show channels'?

Can you call from the FXO to Asterisk? (e.g.: to echo test)

-- 
               Tzafrir Cohen
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http://www.xorcom.com  iax:guest at local.xorcom.com/tzafrir