asterisk users - Dec 2004 - TDM400P FXO channel remains Offhook after outoing or incoming call / line is parallel with other telephone equipment

>Asterisk and it works fine untill the following
>situation:
>
>- one of the telco lines occasionally becomes mute after call is
completed, would not provide dial tone, (not sure about ringing on
that
>line) - both via old and new PBX.
>- zap show channel <n> would show that line as 'Offhook',
though no
telephone is off hook.
>
>If physical line would be unplugged from TDM card, the line would
become normal again.

The offhook in Zap Show Channels is only for FXS cards

>Sorry, if it is a well known problem, but I did not find any specific
information yet.. Please answer two questions:
>
> - is it really bad to have parallel connection on TDM400P FXO lines to
an additional telephone equipment, does it prevent TDM400P to detect
Offhook/Onhook correctly?

I have equipment in parallel with no problems, which version of Asterisk
are you running
Which country are you in? 
Are you using CallerID facilities if so what signalling/method are you
using?

> - will the problems go away when parallel lines would be disconnected
(legacy PBX shut down)?
>
>As you may understand the office personnel has anxiety that this may be
a bad Asterisk setup / bad TDM card etc (which I am sure so far that it
is not).

Maybe but as I say I have not seen such problems. Did lines mute before
Asterisk?

Regards
Ian

My problem with TDM400 was bad FXO module. Now got a replacement from 
Digium. So far it works fine.
I continue to have occasional "loud noise" when dialing out, even
after
Didigum support installed a "patch" for wctdm driver on my server.
I have scheduled restarts of Asterisk and reload of wctdm/zaptel from 
crontab to prevent that situation. It helps.

Ian D. Wlloughby wrote:
>The offhook in Zap Show Channels is only for FXS cards
>  
>
Already figured so.
>I have equipment in parallel with no problems, which version of Asterisk
>are you running
>  
>
Asterisk&zaptel is now latest from CVS. (tried with 1.0 and 1.0-stable 
with same results).
>Which country are you in? 
>  
>
I am in US.

I would be grateful if anybody could tell me what I should tell Verizon 
so they would enable "disconnect supervision" for my lines. Apparently
"remote hangup notification" or "disconnect supervision" or
"calling
party control" is NOT the magic phrase for them. They treat me like I do 
not know what I am talking about (which apparently is true, though they 
might be more helpful).

Thank you,
Andrei

Hello,

I would be grateful if anybody could tell me what I should tell Verizon 
in NJ so they would enable "disconnect supervision" for my lines.

Apparently "remote hangup notification" or "disconnect
supervision" or
"calling party control" is NOT the magic phrase for them. Although 
disconnect supervision is in the glossary on their website.

Thanks a lot in advance.
Andrei