[asterisk-users] Failed Call Debugging?

[Atlanticnynex]

My PHP script is using AMI's Originate command to make two-way calls.
The originate connects the first leg of the calls, plays a file to the
first called party, and then uses Dial() from the dialplan to dial the
other leg of the call.

I'm noticing that only about 30% of the calls make it through successfully.
In looking at Asterisk's CDR's, I have noticed a lot of "NO ANSWER" and
even more "FAILED" call dispositions. It seems that there is a patter of
NO ANSWER being followed by a FAILED immediately after. Although, some
records break this (either vice-versa or a single record of one of them).

My problem is that I am under pretty high volume (say 500+ calls) a day,
and I don't have any way of figuring out what is causing this. Whenever
I test my script manually, I don't have the problem.

Somethings that come to mind are: Lack of Server Resources, VoIP
Provider issues, and Invalid Phone #'s.

I doubt my VoIP provider, Asterlink, is not able to handle my volume
(usually no more than 6 or 8 calls simultaneously). My server load
averages are far below alarm, and I have more than 50MB of free RAM when
6 calls are going through. I have checked for invalid phone numbers, and
that is not the case either.

Here's a couple things I noticed were showing up in the
/var/log/asterisk/messages quite frequently:

WARNING[2220] cdr.c: CDR already initialized on '**Unknown**'  #this
shows up a lot!

and

WARNING[2897] cdr.c: Cause not handled
 WARNING[2266] chan_sip.c: Remote host can't match request BYE to call
'349825703425 at asterlink.com'. Giving up.



Any suggestions on how to better troubleshoot this?

Thanks!
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