> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of Alejandro G
> Sent: Friday, June 10, 2005 8:12 AM
> To: [email protected]
> Subject: [Asterisk-Users] Clicks in audio with TE100P PRI
>
>
>
> It seems that configuring span=1,1,0,ccs,hdb3 and changing
> jitterbuffer=16 resolves or masks the issue. What I will do now is reduce
> again jitterbuffer to default to see what happens.
>
Your issue is very likely the size of the zaptel jitterbuffers setting. If the
zaptel driver is not immediately available to accept a frame of data it places
it in an internal queue of pending writes. If that queue is full then the write
is refused by the zaptel layer and then silently discarded by chan_zap causing
a gap in the audio once it is played out of the zaptel card. If you crank up
the debug level you will probably see 'Write returned -1...' (aka. EAGAIN)
debugs that mostly correlate to the pops and clicks. Note that the zaptel
driver legitimatly (if perhaps not appropriately) also refuses data when the
channel is muted, such as during DTMF generation and at other times, so not
_all_ EAGAIN debugs are a sign of problems.
There is more background on my experience with the T100P pop&click issue in
http://lists.digium.com/pipermail/asterisk-dev/2005-May/012432.html
Hope that helps.
Kris Boutilier
Information Systems Coordinator
Sunshine Coast Regional District
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