[asterisk-users] OT - Do analog gateways detect a phone is plugged in or out ?

[Philipp Kempgen]

Steve Totaro schrieb:
> On Wed, Jul 22, 2009 at 12:07 PM, Steve Underwood <steveu at coppice.org>wrote:
>> Olivier wrote:
>> > I've got a general question about analog gateways (Xorcom, Audiocodes,
>> > Patton, ...) .
>> > Is it usual for analog gateways to detect when an analog phone is
>> > plugged in or out ?
>> > If positive, would it be then useful to send "qualify" queries for
>> > each connect phone (I'm implying here that an analog gateway would
>> > then reply appropriately for qualify query.
>> Unless there is a call in progress the switch has no idea what phones
>> might be plugged or unplugged. Nothing happens on the line what it could
>> detect.

> It certainly would seem "possible" and would be a great feature request.
> 
> There probably is no circuitry existing to do it, but I would assume that
> ohms, volts, or something could be measured while sending a small amount of
> voltage down the FXS lines.

Bonus point will be given for detecting the phone model and color
as well. ;-)


    Philipp Kempgen
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