Mike Tomlinson Inscribed thus:

In article , David
Nebenzahl writes

That second link suggests powering the connecting line with ~24 VDC,
but I don't think that's actually necessary.

I think that's incorrect. You need to provide some line voltage.
12VDC will do it.

computeri

I feel sick.

Please don't suggest using Ethernet or something else instead. I'm
trying to use what's at hand here.

You must have a cable to connect the modem line jacks together. If it
has at least 3 cores free, why not use a direct serial-serial
connection instead of farting about with modems?

I belive the modem to modem cable needs to be Xover as well.

--
Best Regards:
Baron.