[Asterisk-Users] Question :: groundstart and loopstart

[Jon Pounder]

Generally you can tell by your bill :)

if the line is called a trunk, it will be groundstart, if it is called a 
line it will be loopstart.

around here trunks are a few bucks more a piece with absolutely no value 
add that I can see.




At 04:05 PM 6/17/2003 -0700, you wrote:
>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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