Modem to Modem without a line simulator?

der Mouse mouse at Rodents.Montreal.QC.CA
Mon Dec 31 02:44:19 CST 2007

> 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?

It depends on the modems.  Some modems refuse to try to talk unless
they see dialtone and/or battery voltage.  Others can be told to ignore
such deviations from normal PSTN operation and try to operate anyway.
(It's possible that some modems that appear to be in the first class
are actually in the second and just don't document it.)

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