On Monday 10 November 2008 05:56:18 Tony Mountifield wrote: > 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.
That sounds curiously like an FXS in immediate=yes mode (i.e. batman phone, red-phone, etc.) -- Tilghman _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users