This modem has no drivers posted anywhere. I finally found them at a computer shop yesterday and they work.
This driver work for the modem that has the following information
Lucent chipset 1690A
Modem Series NC3005
FCC REG # CNTTAI-33133-M5-E
This driver may work for Win95, WinNT, Win2K, and WinXP.
I loaded it on a Win98SE PC without a hitch, and the modem works fine.
The CD the guy at the computer shop gave me had "COMPAQ DSL+56K Lucent" written on the CD. I haven't checked the compaq website for that descrption. If you search for model NC3005 you aren't going to find the driver, and Lucent doesn't have it either.
Hope hope this works for you like it did for me. Good luck!