On Wed, Jul 22, 2009 at 12:07 PM, Steve Underwood <[email protected]>wrote:
> Olivier wrote: > > Hi, > > > > 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. > > Steve > > 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. A zero would indicate that nothing is attached, any other reading would indicate either equipment or at the least, show that the circuit is not open. -- Thanks, Steve Totaro +18887771888 (Toll Free) +12409381212 (Cell) +12024369784 (Skype)
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