Does anyone here know anything about GEN-GEN analogue circuits, also
known as Manual Ring-Down (MRD)? Apparently they are widely used in
Hoot'n'Holler systems for financial dealer-boards.

I have been asked to try and interface to such circuits, and have been
having great difficulty locating any specifications for the interface.

Apparently, they are always-on 2-wire analogue circuits with no tip
voltage or loop current, and on-demand superimposed ringing voltage in
either direction for signalling (to do nothing more than get the remote
end's attention).

I was wondering whether it is possible to adapt an FXS or FXO port to
operate in such a mode, but I'm not optimistic.

Cheers
Tony
-- 
Tony Mountifield
Work: [EMAIL PROTECTED] - http://www.softins.co.uk
Play: [EMAIL PROTECTED] - http://tony.mountifield.org

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