Let me bottomline this. The TAPI devices I've seen were very finicky as to the OS it ran on. My bet is they haven't run it on XP yet. Or ported it.
Dell and Microsoft are not who you need to deal with. If it's a Nortel "device" then you have to deal with them and follow their setup to the letter. If it means Windows NT 4.0, with rutaba stiping, then that is what it is.
I'd love to comment more (having done TAPI), but my experience is that it's a tightrope (or straightjacket?) setup. And Microsoft/Dell is not the place to call.
There has got to be a way to configure the dialer on my pc, which runs Windows XP, to bypass the modem dialer, and find the telephony adapter, plugged into the serial port. BUT HOW? I know the adapter works, because it does access the phone line and will make an outgoing call, providing I utilize the software program that came with the device. However, I need it to work with the dialer program utility within the computer. When going to the phone/modem dialer properties in control panel, in the advanced tap, I see the driver and properties for the adapter. I just for the life of me can't figure out how to tell the darn pc to use the telephony device to dial out with, instead of the modem. Do you think I could disable the modem, do you think that would help. U have spend countless hours trying to get Dell, Microsoft and Nortel (The telephony manufacturer) to help me and they are playing the run around game with me. They are useless! So I am having to turn to the advise and help of stranger to try to resolve this.
Any thoughts? Any ideas? Please let me know what you think.