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.
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.
David Yat Sin
Sangoma Technologies
(905) 474 1990 x119
(800) 388 2475 x199
MSN: [EMAIL PROTECTED]
Email: [EMAIL PROTECTED]
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