If ur having problems w/ the ip set connecting to the BCM, u need to check the set config under the services button on the set. That's where u go to make the set see the BCM once the ip client key code has been put on the BCM. In the set itself u need to enter the static ip for the set, S1 ip, and the BCM port #. or if using DHCP set the phone up for DHCP. This is also where u set full duplex etc.