[asterisk-users] No audio on Zap (T1/PRI) channels

[Steve Totaro]

Steve Edwards wrote:
> I have 12 T1's going into 3 servers, 4 in each into "Digium, Inc. Wildcard 
> TE410P Quad-Span togglable E1/T1/J1 card 3.3v (rev 02)" cards.
>
> Each "group" of T1's have the primary D on 24 and the secondary D on 96.
>
> The first server (ts20) and the last server (ts22) can playback 
> "demo-congrats" fine. The "middle" server (ts21) cannot -- just dead air.
>
> If I call via ZAP, dead air. If I call via IAX, I hear the file.
>
> I copied /etc/zaptel.conf, /etc/asterisk/*, 
> /var/lib/asterisk/sounds/demo-congrats.gsm from ts20 to ts21 -- no joy.
>
> I have seen this in my system log file:
>
> Oct 2 18:41:49 WARNING[7477]: chan_zap.c:8087 zt_pri_error: [Span 0 
> D-Channel 0] PRI: !! Got reject for frame 95, but we have nothing -- 
> resetting!
>
> I'm running asterisk-1.2.24, asterisk-addons-1.2.7, libpri-1.2.5, 
> zaptel-1.2.20.1.
>
> "show channel zap/?," "zap show channel ?" appear identical between 
> working and non-working systems both "on-hook" and "off-hook."
>
> Any clues or clues where to start looking?
>
> Thanks in advance,
> ------------------------------------------------------------------------
> Steve Edwards      sedwards at sedwards.com      Voice: +1-760-468-3867 PST
> Newline                                             Fax: +1-760-731-3000
>
>
>   

Double check both zaptel.conf and zapata.conf and also call the telco to 
make sure they have they have the same NFAS scheme on all T1s setup 
correctly.  Sometimes (let's face it, alot of times, the provider messes 
something up).

Also check that all of your T1 cables are plugged into the correct T1 
port.  I have made that mistake myself when doing 28 T1s off a T3.  I 
got dead air just as you described.

Thanks,
Steve Totaro