What type of modem should I use?

[Perry Minyard 3MTA3]

One of our clients has SCO Xenix 386 2.3.2 running on a 33mhz Compaq machine.
They want to set up a remote terminal at another location.  What type
of modems would you people recommend?  It needs to be at least 9600 baud and
needs to be reliable. We have a couple of Hayes V-Series modems sitting
around, but I haven't had great luck using them in a Xenix environment. 
I'd like to hear some suggestions from you net-folx.  Thanks.

-- 
"A mind is a terrible thing to taste."   | Perry Minyard
- Ministry                               | ..!emory!bluemtn!perry
-------------------------------------------------------------------------