GSM modem for QNX

We are ooking for a driver for using GSM modems of either Siemens or Nokia
or ericcson make to connect our field QNX based controllers to be linked to
our master controller/SCADA working on QNX OS.
Can any body help?
L.R.Subramanyan.
Situ Electro Instruments Pvt Ltd.
email: lrs@vsnl.com or seto@vsnl.com