asterisk users - Mar 2006 - [FOLLOWUP]: Calls not tearing down properly

As a follow-up, I have traced the PRI connection and discovered that calls
hung up by a local BCM voice station (analog, digital, whatever) send a
disconnect with a clear cause of 1 (Number not assigned) instead of a normal
clear cause of 16.  Calls forwarded through the BCM disconnect with the
normal clear cause.
 
I have kludged up a fix to change all clear causes below 2 to 16 (I placed
"if (icause <= 1) icause = 16;" after line 2506 in
channels/chan_zap.c
(version 1.2.5)).  I am waiting to see if it solves the D-channel drops.
 
As an aside, I have noted that calls that are hung up before completion,
from either the Definity or the BCM, clear with a cause of -1.  This can
hang a channel on the Definity side as well.

Mark.

________________________________

From: McQuiggan, Mark xt46480 
Sent: Monday, March 13, 2006 4:20 PM
To: 'asterisk-users@lists.digium.com'
Subject: Calls not tearing down properly


I have the following configuration:
 
Bell CO. <---ISDN---> Definity <---ZAP PRI--->  Asterisk  <--ZAP
PRI--->
Nortel BCM.
 
With SIP users on the Asterisk box.
 
I have found a problem with call tear-downs.  When a caller calls in from
Outside, or from a Definity station to a BCM station, _and_ the BCM hangs up
first, the Definity - Asterisk call does not tear down properly.  I get a
problem tone on the Definity station, or a "not in service" message
from
Bell for outside callers.
 
All other calls tear down properly, in either direction, no matter who calls
or who hangs up first.  
 
I have been having problems with my Definity Asterisk connection dropping
its D-channel (and all connections existing at the time of the D-channel
drop).  I believe that they may be linked.  In using gdb, I was seeing
problems with pri_disconnect_timeout.
 
Please help.
 
Regards,
 
Mark.

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