asterisk users - Mar 2005 - TDM400 audio problems

Sorry everyone, I know this has been hashed over a bunch of times but I
can't find anything that pertains to specific cracking and popping on the
FXO modules of a TDM04.  This happens on inbound or outbound calls.  This is
the first install I have done with a TDM card for FXO modules so please, be
kind if I am missing something really simple.

Damn I wish everyone wanted t-1's or pri's!

Everything sounds great UA to UA and the dialplan works but any calls
through the TDM card sound like crap.  Getting bunch of crackling and
ticking in the audio.  I swapped the tdm card with a spare x100 clone that I
had lying around and the audio is fine.  This is a p4 3.4 proc with 4 gig of
DDR2 on an Intel server board.

zaptel.conf

loadzone = us
defaultzone=us
#fxsks=1-4
fxsks=1

zapata.conf

[channels]

language=en
context=incoming_grace
signalling=fxs_ks
usecallerid=yes
echotraining=yes
group=1
immediate=yes
;channel=1-3
channel=1

;group=2
;context=incoming_institute
;signalling=fxs_ks
;usecallerid=yes
;echotraining=yes
;immediate=yes
;channel=4

Thanks,

Jason Kawakami
www.optellabs.com
Salt Lake City, UT

> Sorry everyone, I know this has been hashed over a bunch of times but I
> can't find anything that pertains to specific cracking and popping on
the
> FXO modules of a TDM04.  This happens on inbound or outbound calls.  This
is
> the first install I have done with a TDM card for FXO modules so please, be
> kind if I am missing something really simple.
> 
> Damn I wish everyone wanted t-1's or pri's!
> 
> Everything sounds great UA to UA and the dialplan works but any calls
> through the TDM card sound like crap.  Getting bunch of crackling and
> ticking in the audio.  I swapped the tdm card with a spare x100 clone that
I
> had lying around and the audio is fine.  This is a p4 3.4 proc with 4 gig
of
> DDR2 on an Intel server board.
Usaually those types of problems are associated with motherboard interrupt
issues. Might try analyzing the following commands:
 
cat /proc/interrupts
 (check to see if wctdm is sharing an interrupt with something else. If so,
  try to move the tdm card to another pci slot, or, look in your bios 
  setup to disable unused interrupts.)

run 'zttool' to see if you have any irq misses. If so, those need to be
resolved.