<br><br><div class="gmail_quote">On Wed, Jul 22, 2009 at 12:07 PM, Steve Underwood <span dir="ltr"><<a href="mailto:steveu@coppice.org">steveu@coppice.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div></div><div class="h5">Olivier wrote:<br>
> Hi,<br>
><br>
> I've got a general question about analog gateways (Xorcom, Audiocodes,<br>
> Patton, ...) .<br>
> Is it usual for analog gateways to detect when an analog phone is<br>
> plugged in or out ?<br>
> If positive, would it be then useful to send "qualify" queries for<br>
> each connect phone (I'm implying here that an analog gateway would<br>
> then reply appropriately for qualify query.<br>
</div></div>Unless there is a call in progress the switch has no idea what phones<br>
might be plugged or unplugged. Nothing happens on the line what it could<br>
detect.<br>
<br>
Steve<br>
<br>
</blockquote><div><br>It certainly would seem "possible" and would be a great feature request.<br><br>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.<br>
<br>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. <br></div></div><br>-- <br>Thanks,<br>Steve Totaro <br>+18887771888 (Toll Free)<br>
+12409381212 (Cell)<br>+12024369784 (Skype)<br>