GSM modems

[Andrea Venturoli]

Hello.
I'm working on a project where we need to use GSM modems to be able to 
send and receive short messages; right now this is implemented through 
SMSTools.

We are having a lot of problems like the modem hanging and stopping any 
communication with the computer, the modems suddenly saying the SIM card 
is bad or that the ISP network is refusing registration.
Most of these are resolved by unplugging/replugging the modem.


I was wondering:
_ can (some of) these problems be FreeBSD related (e.g. USB driver 
issue, or something)?
_ has anyone had any similar experience?
_ can someone suggest a brand/model which works fine? (We tried three 
different ones, but all show some glitch).



  bye & Thanks
	av.