Micro-Sys, has written a VI library for using modems with LabVIEW.. check them out:
http://micro-sys.com/modemnow.htm
"ModemNOW!� Suite enables communication between your LabVIEW program and
modems, fax machines, pagers and the Internet. Monitor and control RS-232
and GPIB instruments. Automatically receive reports. Be instantly informed
of system failures. It even allows you to send data to another computer via
modem."
Another possibility is the supercom toolkit by Adontec.
http://www.adontec.com/super_e.htm
Marc
