[Kneebs]

I take it at work, both your modem and your phone are doubled up into one analogue extension port - if your office phone is digital (meridian, nortel, panasonic etc) this wont work - it needs to be analogue.

And as its the office, if applicable, have you prefixed your contacts numbers with your outside line code (eg 9) ?

Edit - I take it the modems installed and configured correctly within windows ? Also, does it give you any error messages , such as no dial tone detected ?

Mick