Is this PIC related??? >> >>BUZZT >>On this they do! The line voltage is 48V in the specs (Telstra 1563) and it >>has a minimum voltage drop (2V) to the tip and ring lines irrespective of >>the exchange battery which can be in the range of 42 to 56V. As for the >>current, 20mA is the nominal limit, however exchanges must operate down to >>17mA (Austel TS002). > >Un-BZZt. Do you see a spec for OFF-HOOK voltage at the subscriber side? >No you don't. ON-Hook is easy, and yes, they all spec that. Off-Hook is the >interesting one. > >>As for the current-orientated world, yes! But does your equipment work down >>to 3V (This is what providers would like, so that the exchange lines can be >>longer), but on this Austel TS002 says that the voltage across the >equipment >>should not be less than 8V. > > >All I need is 20mA and about 2.4V across me. > >>As for the light bulb surviving line transients, well unless it is >something >>like a 6MW bulb, i don't think it would go past a 20KA pulse test! > > >I mean in this limited app, to provide a quick hack to link two modems. I >don't design CO equipment in email.