[asterisk-users] Static in Monitor recordings

[Adam Kavan]

I am running Asterisk 1.2.9.1 in a call center with 26 agents placing
outbound calls using SIP soft phones going out a Diginum 4 port T1 card
(All 4 spans have PRI t1's).

 

All of the calls run through 

 

[macro-record-call]

exten =>
s,1,Monitor(wav,${ARG1}-${CALLERIDNUM}-${DATETIME:0:11}-${DATETIME:12:2}
-${DATETIME:15:2},mb)

 

and this works fairly well, however several times a day I get recordings
with static in them.  It sounds like a corrupted wav file, with noise in
it all over the place.  It is obvious from the conversations occurring
in the recording that the other people involved in the call do not hear
any of the static, so I assume that it is coming from the recordings.

 

Also, our QA people are using ChanSpy to listen into these calls and
tell me that they can hear the static as well, but I have not been able
to verify there claims.

 

Last night I tried using MixMonitor instead of just Monitor and QA
claims that there were no problems with the sound, but my Asterisk
server kept crashing and I assume that MixMonitor was at fault (the
crashes went away as soon as I changed back to regular Monitor).

 

Does anyone know why this might be happening?

 

On the whole I am having no stability problems other than last night
with MixMonitor.  I eventually want to scale my deployment up toa little
over 200 agents and I want to make sure I get this figured out while I
still am using my fairly small testing population.

 

My server is a Dell with 2 X Intel(R) Xeon(TM) CPU 3.20GHz with
hyperthreading turned on and 4 GM of RAM and my storage is a SCSI
hardware raid card, pointing to a mirror.

 

Any help you can give me would be greatly appreciated.

 

--- Adam Kavan

--- akavan at prconline.com

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