This is a fast changing area of the datacomms world.
If you put these five lines togther as a link and scroll to the bottom when you get there where it refers to Data products it will take you to the part of the Motorola on-line shop where they are selling the complete kit from PCMCIA Modem to cable connection for the L7389 Timeport phone.
h--p://www.direct.motorola.co.uk/is-bin/
INTERSHOP.enfinity/eCS/Store/en_GB/-/GBP/
ZDetermineAccessoriesForPhone-Categories;%24sid%
24PWv1aj0plpRD7uhw22yoeCbUCvkP1Uyn?
ProductSKU=2041&CategoryName=GB_PRO_ACC_PHO
You may have difficulty communicating with the shop people as they are minimally trained but the people who man the telephone sales are better.
I had bought my tri-band Motorola Timeport from CarPhone Warehouse in 2000. I already had the Psion modem card for landline use with the laptop; so all I wanted was the cable.
This is badged "Startec" was efficiently supplied by Stardem in Wokingham after a talk-through with the sales people. It cost £97.53 inc PP/VAT! At one end it plugs into the card Modem and at the other it plugs into the bottom of the mobile 'phone where the charger goes. PC and 'phone work together beautifully.
http://www.stardem.co.uk
Bluetooth? probably won't be around in a year or two but no harm in typing "Bluetooth" into a search engine and browsing through the 1,320,000 results.