Hmm, it sounds to me the hangup detection problem. Here's a way to solve that problem:

Apply this patch:

http://www.maxosystem.net/asterisk/asterisk-stable-polarity-v5.diff

$ cd /usr/src/asterisk/channels
$ patch chan_zap.c < /your/route/here/asterisk-stable-polarity-v5.diff
 
and in zapata.conf :
 
answeronpolarityswitch=yes
hanguponpolarityswitch=yes
 
Sure, it will only help if your PSTN company does hangup detection by changing polarity of the line, refer to their line specificacions to more info.
 
Hope it helps ;)
 
 
----- Original Message -----
From: "John Heng" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Friday, November 18, 2005 1:56 AM
Subject: [Asterisk-Users] Hung Zap channels

Hi all,

I'm running asterisk 1.0.9 (yes I know - 1.2 has just been released) with a TDM400P board that has 4 FXO port. Once in a while, I've found that the zap channel will get stuck (or blocked) even after the call has ended. Sometimes this is when someone has left a voice msg, but not always.

The way I've fix this is to issue a "soft hangup" command for that zap channel. However, I'm not always aware of this until a user tells (or complains to) me.

What I would like to know is if there is a way to reset all the zap channels or re-initialize the drivers without restarting Asterisk. If so, I could set up a cron job to do it once or twice a week, in the middle of the night. Any suggestion guys??

Cheers
J Heng

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