[Asterisk-Users] Problem with Dutch PSTN-line on X100P

[Eric Wieling]

Check /proc/interrupts to make sure the cards are not shareing IRQs with
anything.

On Thu, 2003-10-02 at 11:43, The Traveller wrote:
> Yo all,
> 
> I have a problem with a Dutch (KPN) PSTN-line, connected to an X100P.
> The call wil sound OK at first, but after 10-20 minutes, the audio will
> start to crackle.  Soon after that, this crackle turns into a continuous
> noise and the parties won't be able to hear eachother anymore.  It also
> sometimes happens that the party on the TDM400P hears a very loud,
> short-delay echo of themselves, best described as "talking in a
> bathroom".  It very much sounds like very bad feedback, most of the
> time.
> 
> The system concerned is a PIII-750 with an X100P and a TDM400P.
> The problem occurs when a call is bridged between the X100P and
> a port on the TDM400P.  Calls from the TDM400P to a remote IAX2-
> connected box seem OK.
> 
> rxgain / txgain are at their default (0) for all interfaces and I'm
> using the default echo-cancellation settings, with "echocancelwhenbridged"
> enabled.  The PSTN-line concerned is a standard analog line from KPN, which
> also has ADSL coming in over it.  The X100P is, ofcourse, connected
> behind the splitter.  When I connect the X100P to an internal analog
> port of a small legacy home-switch, the problem doesn't seem to occur,
> either.
> 
> I'm using "opermode=1" for the X100P, but read on this list somewhere
> that the chip used on the X100P is actually not the international version,
> so this setting might not have any effect.  In this case, it doesn't
> seem to matter if I use it or not.  There's no notable difference.
> 
> I'll probably investigate this problem further and play with the echo-
> canceller and rxgain / txgain a bit.  Just curious if anyone else
> is experiencing something similar and might have found a solution already.
> 
> 
> 
>    Grtz,
> 
>       Oliver
> _______________________________________________
> Asterisk-Users mailing list
> Asterisk-Users at lists.digium.com
> http://lists.digium.com/mailman/listinfo/asterisk-users
-- 
Sample configs and more: http://www.fnords.org/~eric/asterisk/

BTEL Consulting
+1-850-484-4535 x2111 (Pensacola)
+1-504-595-3916 x2111 (New Orleans)
+1-877-677-9643 x2111 (Toll Free)