At 11:52 AM 12/30/2007, you wrote:
This question is bugging me from another forum.
Is it possible to connect two modems (eg: Hayes 2400 to Hayes 2400)
using a 'dead' or isolated pair of copper wire and have them be able
to communicate?
I always thought that this can not work because the line that the
modems are connected to has to have some current. The phone system
works because an action on one end of the phone (talking into the
carbon microphone) causes a reaction on the other end. Without some
sort of current on the line, how can this work? Hence the need for
'line simulator' circuits
Some people are claiming that it works without the line
simulator. I'd like to understand why.
(I could get out the multimeter if things get really desperate, but
maybe somebody can tell me that the line current thing only applies
to acoustically connected modems, not direct connect. Or the direct
connect modems put enough juice on the line to make it work. Or
something else that might make sense.)
I've done it with a Hayes 1200 and a Hayes Supermodem 28.8. I think
I may have done it with a Hayes 300 in an Apple IIe.
I don't know how it works, but it did...