[Asterisk-Users] Which is the best signalling for FXS

[Rich Adamson]

> > > > Kewlstart is for disconnect supervision. If you have a simple phone
> > > > connected, it doesn't make much difference what your signalling is as
> > > > the human will actually hangup the phone. If you hookup another device
> > > > that might actually need the supervision like a
> > > > modem/faxmachine/whatever, you will still want disconnect supervision.
> > > > As far as technical best, out side of the disconnect supervision, the
> > > > kewlstart and loopstart are equivalent.
> > > 
> > > It is also my understanding that most local exchanges (in the US) don't
> > > enable disconnect supervision by default. I had to ask my telephone
> > > company to enable it.
> > 
> > That's not true. In fact, most US telco switches do support disconnect
> > supervision. Are you sure your not confusing disconnect supervision with
> > something else, maybe which end of a call 'controls' the disconnect
> > signalling?
> 
> Please reread James' comment. He didn't say it wasn't supported. He said
> it was not normally enabled. 

I _think_ I read it correctly the first time. Isn't the original question
oriented around call control as opposed to 'disconnect supervision'?

Disconnect supervision _is_ the signaling that a call has terminated (via
zero voltage on tip/ring), and the majority of US telco switch vendors
implement that as a default. "Who" gets to originate the disconnect is
the issue, right? Or, do I need more coffee? :)