How do I set up ATE for an external modem???

[Kevin O'Gorman]

Hmmm. I have a Telebit Trailblazer Plus as an external modem, and I want
to call out with ATE (sorry, you haters of AT&T software, I like it).
So far, I have had to lie to the system, telling it that I have here a
Direct connection, because it otherwise complains first that the entry
needs a phone number, and then that the line is not set up for dialing.

My guess is that there ought to be a modemcap file around here somewhere,
but I'll be darned if I can figure out where it ought to go.

I'm running 3.51a kernel, phone manager, ATE, and HDB uucp.  Yes, I can
use cu, but I'm fond of the dialing directory.

HELP?