On Thu, 1 Dec 2005, Padu wrote:

> From: "Dave Lag"
>> 
>> What do yoou mean by "digital phone line" Connected to a local 
>> PBX/KEY system? -those formats are typically proprietary D
>
> Exactly. I'm figuring that out. I got some specifications for a 
> Meridian system, and they use something called a two-wire TCM 
> (time-compression multiplexed) loop at 512kbps. What I'm investigating 
> is the possibility of detecting on/off hook no matter what system.
>
> It should be possible, I remember one recording device that could be 
> plugged to any major PBX [digital] system and it would capture the 
> voice data from there. But I could be completely wrong.

I think that you can't, for the type of signalling you indicate. At 
least not with integrators and other analog games.

Peter
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