Hello,
I have one of these cards.  It won't work unless you use the 3Com

drivers on Windows, and even then it doesn't work right.  If you use a

standard US Robotics external modem, preferably a Sportster, or even

possibly a Zoom PCMCIA modem, they should work.
Mitch
-----Original Message-----

From: owner-misc@openbsd.org [mailto:owner-misc@openbsd.org] On Behalf

Of Raimo Niskanen

Sent: Wednesday, June 13, 2007 5:22 AM

To: misc@openbsd.org

Subject: Troubleshooting PCMCIA modem 3Com 3CXM756
Hi all!
I have an old laptop on whith I want to use ppp

to connect to Internet, using a PCMCIA modem

3Com 3CXM756 "Global GSM & Cellular Modem PC Card"
First, I _think_ it shows up as /dev/cua03. In

dmsg it pops up as device pccom3, and when trying

with tip it appears that while the card is in

it fails as described below, while the card is

out it fails with "device not configured".
Nevertheless. ppp, minicom and tip all try to

send AT commands but get no responses, as

it appears. I do not see any logs, almost.

ppp says it does ATZ^M and waits for OK

which does not happen. minicom and tip

try to dial and say it fails.
Have you got any tip on how to troubleshoot this

card, or does anyone know this card is a dead end

and can name a proper serial line, USB or PCMCIA

modem that is known to work?
--
/ Raimo Niskanen, Erlang/OTP, Ericsson AB