Jiju Thomas Mathew typed:
>
> for connecting and experimenting, you would not even require an intercom
> but a straight modem cable, connected from one modem to the other modem
> with the cable in at the line socket at both ends. then you have to issue
I doubt if all modems will work properly with a cable connected between
line jacks. The telephone line normally carries a DC voltage (about 48V in
open circuit mode) on which the ac signal is superimposed. Depending on
the design, this volage is sometimes very essential for proper
operation of the modem and it may refuse to work without it. (For instance
if the modem checks the loop current when it goes off-hook and doesn't
believe that it's online if the DC current is not detected - or if some
front end circuitry derives its power from this DC bias)
Kala
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