<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=us-ascii">
<META content="MSHTML 6.00.2900.2180" name=GENERATOR></HEAD>
<BODY>
<DIV><FONT face=Arial size=2>
<DIV><FONT face=Arial size=2><SPAN class=234103121-28042006>We ran some tests on
our line here where a scope and voltmeter, we were able to see the waveform
changes on incoming call and the voltage at 6-7v during the conversation, but no
drop in voltage (or reverse tip/ring) when the remote side hanged-up. The
voltage went back to around 48v after 8-10 seconds, which is when the FXO port
goes on-hook. </SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=234103121-28042006></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=234103121-28042006>We used a regular
analog phone connected directly to that line and it did not detect the hang-up
either. It looks like some Bell lines do not provide disconnect
supervision. </SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=234103121-28042006></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=234103121-28042006></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV align=left><FONT face=Arial size=2>David Yat Sin</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Sangoma Technologies</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>(905) 474 1990 x119</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>(800) 388 2475 x199</FONT></DIV>
<DIV align=left><FONT face=Arial size=2>MSN: <A
title=mailto:david.ys1@hotmail.com
href="mailto:david.ys1@hotmail.com">david.ys1@hotmail.com</A></FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Email: <A
title=mailto:davidy@sangoma.com
href="mailto:davidy@sangoma.com">davidy@sangoma.com</A></FONT></DIV>
<DIV align=left><FONT face=Arial size=2>Wiki: <A
title=http://sangoma.editme.com/
href="http://sangoma.editme.com/">http://sangoma.editme.com</A></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV></FONT><FONT face=Arial
size=2></FONT></DIV></BODY></HTML>