asterisk users - Jun 2004 - determining cause of dropped calls?

I am trying to figure out why calls between SIP devices and the PSTN are
being regularly dropped after anywhere from 2-15 minutes.  I have turned
on everything I can think of, but I don't see any obvious reasons for the
drops.  All I can see from turning on debug and verbosity is two messages
advising of a destroyed call, followed by normal-looking SIP and ZAP
termination messages.

The first indication there is a problem, immediately before the call is
dropped is something like:

Destroying call '16118f2c0e1f992d7ee90db64dd58356@216.162.162.37'
Destroying call '0e5d498820a12c7d@199.165.203.107'

Is there something I can turn on/enable that will tell me who is causing
the call to be destroyed and why?

TIA

Bruce Komito
High Sierra Networks, Inc.
www.servers-r-us.com
(775) 284-5800 ext 115

I am having a similar problem. It is not frequent, perhaps once in 
80-100 calls.

CVS-HEAD-05/08/04-21:57:50 using Cisco 7960 6.3 and X100P

> --__--__--
>
> Date: Tue, 1 Jun 2004 21:04:14 -0700 (PDT)
> From: Bruce Komito <brucek@bagel.com>
> To: asterisk-users@lists.digium.com
> Subject: [Asterisk-Users] determining cause of dropped calls?
>
> I am trying to figure out why calls between SIP devices and the PSTN are
> being regularly dropped after anywhere from 2-15 minutes.  I have turned
> on everything I can think of, but I don't see any obvious reasons for
the
> drops.  All I can see from turning on debug and verbosity is two messages
> advising of a destroyed call, followed by normal-looking SIP and ZAP
> termination messages.
> 
....