[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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