> > 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? > > There are likely lots of US systems that are oriented around "calling > party" control verses "called party" control of disconnect. But once the > central office has decided to disconnect the call (regardless of cause) > you should "see" disconnect supervision in the US in the form of either > a drop of tip-ring voltage (to nothing) for about 400 milliseconds or so, > or polarity reversal for the same approx 400 milliseconds. (Both can > easily been seen with a cheap voltmeter placed across tip/ring.)
That's what I was looking for and the telco wasn't providing it. I found this in both Pennsylvania and New Hampshire. Both were little mom & pop phone companies. They said that DS can cause a click in the reciever of some phones so they normally turned it off. _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
