[asterisk-users] kewlstart disconnect threshold

[Stephen Bosch]

Leo Ann Boon wrote:
> 
>>> Good question. Anyone knows if the TDM-400 actually detect loop drops?
>>>     
>>
>> Well, that's really what kewlstart (and loopstart) means. If it
>> couldn't, then Asterisk wouldn't know that the call had been hung up,
>> and hog the channel.
>>   
> For loopstart lines, I don't think Asterisk detects loop drops. If it
> does, we won't have lots of people complaining about asterisk not
> hanging up when the remote party hangs up.

The reason we have these complaints is not because Asterisk doesn't
detect the drop -- it's because a great many telephone companies don't
do remote party disconnect signalling, or they don't do it properly.
When people call for technical assistance they usually end up talking
with someone who has no idea what Calling Party Control or remote party
disconnect actually is.

Case in point:

I am with Telus in Alberta, Canada. By default, the "loop drop" (it's
actually a battery drop, as near as I can tell, but kewlstart will
detect both) occurs after more than a minute. On some lines it doesn't
happen at all. This is a telco switch programming issue and has nothing
to do with Asterisk or zaptel.

Anyway -- the question remains -- how can the detection threshold for
kewlstart and loopstart be set? This has to be set somewhere, even if
it's in the source code.

-Stephen-