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Hello Astrites,
I was just about to send out a long email about not being able
to detect hang-up with my CAC II FXO module on my PSTN POTS lines. I had
tried many configurations. I had attached a toner to the line to see if I
was getting this "disconnect supervision" signal after hang-up. (toner has
a line powered light in the off position) It seemed that I was getting the
signal, as:
The light was steady on onhook
When the line rang the light
dimmed.
When I picked up the line stayed dim (If I
remember correctly)
When the other end hung up the light stayed
on
Then turned off momentarily a few seconds
later. (I suspected this was "disconnect supervision")
Anyway asterisk never detected hang-up. Everything else
worked. I was frustrated as hell.
After a few days of trying everything, I tried to set my CAC
II FXO module to Groundstart and configured zaptel.conf and zapata.conf to
groundstart signaling.
Voila! Everything work!
The question is how does groundstart and loopstart work?
How was I able to have a somewhat working system using loopstart when it seems
that the phone company signaling was groundstart? Can I assume that my
lines are indeed groundstart?
I am really happy that it works. I can now begin the
process of deployment with a much greater feeling of security.
Jason
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