I have a Partner II Communications System Rel. 3.1. On page 4-19 of the manual it shows a modem installed on a PC and connected to an extension with a system phone hanging off it as well. In this configuration it appears as though I can have a modem and use it as a dialer from my PC and them use the phone once I am connected. Whne I connect the modem this way the phone gives a constant clicking sound and cannot be used. The modem does not dial out. What am I doing wrrong or am I asking for something that is impossible?