Phones for Asterisk and single-pair old phone wiring?

[VirginSnow at vfemail.net]

> Date: Wed, 3 Sep 2008 10:34:58 -0400
> From: "Ben Scott" <dragonhawk at gmail.com>

>   Anyone know of any kind of enhanced telephone set that can be
> connected to an Asterisk-based system using plain old telephone phone
> wiring?

You might also look into X.25.  It's a packet networking technology
designed to run over ordinary phone lines and (used to be?) common in
office settings.  Last I checked, Linux had an X.25 protocol stack.
If you could find any X.25 phones, you might be able to get them
talking to Asterisk over those crummy old 2-conductor phone lines.