Re: [Asterisk-Users] Re: tdm400p static - out of ideas (Jorge Mendoza)

[Ryan Courtnage]

On 8-Jul-04, at 10:49 AM, David Cook wrote:
Ryan, from the console what does "zap show channel 1" or 2/3/4 in your
case say.
I have X100P's and I seem to be having similar sounding problems. I
noticed that the above command shows the channel to be off-hook at all
times when a phone line is plugged in.
My is the same way (I've tried on 2 servers with tdm400p cards) - my 
guess is that this is normal.

I don't know why or if it is a bug in the application reporting the 
status.

dbc.
Ryan Courtnage wrote:
On July 8, 2004 03:22 am, Nicholas Bachmann wrote:
Ryan Courtnage wrote:
Hello,
Over the past several weeks, we have been having an intermittant 
problem
with our deployment of a TDM400P card (4 fxo).  We have tried many
things, and the problem still re-occurs.

The Problem:
Occasionally (every 48 hours), the TDM400p card will stop answering
incoming calls on ALL fxo ports.  Attempts to send outbound calls 
on any
Zap channel will result in hearing a loud 'static' noise on the 
line.
Let's look at some possibilities of line problems:
What time does it stop answering? Is it ever during ALIT times 
(usually
very early morning)?

It's totally random - morning/evening/afternoon.  Once it stops 
answering,
that's it, a reboot or module-reload is needed.  If ALIT for some 
reason
prevents the card from answering, it should be able to recover and 
begin
answering after the ALIT is complete.


Have you tried calling the telco to see if it could be their problem?

When the card goes into the non-functional state, I can plug a regular
phone
into any of the lines and make calls just fine.  After verifying 
working
lines and plugging them back into the tdm400p card, I still can't 
dial out
(the Zap channel will answer, but I will hear only static, and the 
call to
the pstn is never placed).  As well, incoming calls will not be
answered (*
console will not even show the 'started simple switch on zap/x' 
message).


How far away from the CO/mux are you?

Not too sure - it's in downtown Calgary - so probably not far.
There is the possibility that _something_ with the phone line is
triggering
the problem.  Maybe it's some noise, an unexpected signal, some
crosstalk ...
things that will cause unexpected behavior ... but also things that
shouldn't
put the entire card into a non-functioning state.

Have you tried a new/different card?  If you didn't want to fork out 
the
cash for a new one, you could try a X100P/knockoff* on one of the 
lines
to see if that fixes the problem... if so you can deduce a bad card.

I may have to push for a replacement tdm400p card from Digium.

Nick
*I usually don't recommend the knockoffs, but for a day of testing 
$10
sure beats $100... everybody else should support Digium! :-)

An acquaintance who is having the same problem has reluctantly
replaced his
card with an openline4.  I would like nothing more than to stick with
Digium
hardware - this thread and obtaining a replacement card is my last 
kick at
the cat.
--
David Cook
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