[asterisk-users] Terrible clicking on T1

[Eric "ManxPower" Wieling]

Steve Totaro wrote:
> Eric "ManxPower" Wieling wrote:
>> Gleim, Jason wrote:
>>
>>   
>>> I thought that might be an issue too... and it was originally. When we
>>> started out, I had the Sangoma card generating the timing for the span
>>> but we could never get the d-channel to come up. Turns out that since we
>>> were connected to the PSTN, we had to let the Nortel set the timing on
>>> the span because it was receiving the timing from the CO. (Essentially
>>> the timing needed to 'flow' away from the CO)
>>>
>>> But, since we got that fixed and the span started working, I felt that
>>> timing wasn't the source of the problem. Plus, if we dump the error
>>> counters on both ends, they are not incrementing... even if the span is
>>> up for several days and we clearly have the audio problems. The slip
>>> counters, framing error, etc all stay at 0 and you would figure that if
>>> it was timing slip, those would be incrementing on at least one of the
>>> sides.
>>>     
>> Does "cat /proc/interrupts" show any interrupt sharing with the Digium card?
>>
>>   
> 
> I hope not since he has a Sangoma card which I believe does not suffer 
> from the same IRQ woes that Digium cards do.

Silly me.  Samgoma cards seem LESS prone to IRQ latency issues, but they 
are not immune from it.