[Asterisk-Users] Static and echo on PRI

[Mark Johnson]

Michael Welter wrote:

> Mark Johnson wrote:
>
>>
>> I tested and I do in fact get from 40-50% system util every 5 seconds 
>> or so.  After removing the wctdm module, the system util drops to 0 
>> and stays there.  I have not loaded the wcfxs and wcfxo modules 
>> because I could never get them to work right.  I instead load the 
>> wctdm and it has seemed to work fine.  I only need to make the fx 
>> port to the paging system work and the others can stay idle.  What 
>> modules and order so you suggest.  Here is what I load in this order:
>>
>> wct4xxp
>> wctdm
>>
> Do you still have the static on the PRI without the TDM modules?
>
I finally got to test...  Removing the tdm module makes no difference in 
the static.  I still hear it for any incoming sound.  Removing it does, 
however clean up the CPU usage but quite a bit.  One odd thing was with 
the tdm module removed, it seemed to introduce a little delay in the 
conversation.

I also tried to recompile the zaptel drivers with the aggresive 
cancellation.  This seems to made a HUGE improvement to my echo problem.

Any ideas?

Mark