Modem set-up for Hylafax

I'm trying to set-up my modem and Hylafax. The modem set-up facility in kde is for dial-up isp service. it reports my modem on ttyS14. setserial reports settings, but so does every other com port. how can I check which com port the modem is on and is there a simple communications program where I can send some AT commands to the modem to see if it is responding properly. Then I'll ask some Hylafax questions