[Asterisk-Users] How to fix a Blue Alarm?? Line Noise?

[Bruce Ferrell]

Geoff Manning wrote:
> Peter Svensson wrote:
> 
> 
>>I am not that familiar with T1, Are you sure the signalling between
>>the pbx and asterisk is set the same on both?
>>
> 
> 
> I have unearthed some documentation on the programming side of the legacy
> PBX. I can set the following on the PBX for each line on the T1 card:
> 
> Line Type:
> 
> 0	immediate return on signalling
> 1*	wink start, return supervision on answer
> 2	wink start, return supervision on ring
> 3	return supervision on answer
> 4	return supervision on ring
> 
> I have tried all of those setting and nothing seemed to have any affect. But
> I feel those settings in conjunction with some settings in zaptel/zapata
> conf files may help. I am going to try some out, any ideas are welcome!
> 
> * It is currently set at 1

Those options are all related to per circuit call signaling.  blue 
alarms refer to timing errors on the T1  i.e. timing loss such that an 
entire frame is either dropped or repeated.

You need to be looking at a "lower" level