[Asterisk-Users] Clicks, pops and noise

[Rich Adamson]

> >If you don't have any T1/E1 connections to the outside world, then
> >pick one channel bank and call it your official source of sync, and
> >change the above definitions to sync off that channel bank. On all
> >other channel banks, configure them to sync off the asterisk card.
> >
> 
> <snip>
> 
> >Your clicks will go away.
> >
> 
> Rich,
> 
> Thanks for your input. I tried as you suggested, and now the first
> channel bank is set as master. The three other channel banks are set as
> slaves. My zaptel.conf now looks like:
> 
> span=1,1,0,esf,b8zs
> fxsks=1-24
> 
> span=2,0,0,esf,b8zs
> fxsks=25-48
> 
> span=3,0,0,esf,b8zs
> fxsls=49-72
> 
> span=4,0,0,esf,b8zs
> fxsls=73-96
> 
> so essentially saying that the first FXO channel bank's T1 is the
> primary sync source. unloaded zap modules, reloaded them and restarted
> asterisk. clicks and noise still appear. but it was after I did an
> AutoT1 (forgot to mention we're using Rhinos) did the click and pops go
> away.
> 
> However, some channels on one of the channel banks are still problematic.
> I'm checking with Rhino to see if it's a channel bank problem, since
> the noise always appears on the same channel no matter how many times I
> reboot, unload/load etc.
> 

One other item to check is to ensure the digium T1 card is on its own
dedicated interrupt. Use 'cat /proc/interrupts' from the system command
line.