I have an 8100 using software 3.0 with a 32 ipla and a pri. I have setup a test ip phone at our office using static ip(no dhcp) it works fine. But I have installed another at a customer home and used the same settings as the first phone. The firmware on that phone is 3.0.4 I end up with one way speech path and sometimes it will not release the call when it is ringing. It also reboots itself from time to time and says network busy. I have gone over the port forwarding and settings in the phone several times and can't seem to figure out what I am missing?????? The customer has cable modem and cisco valet router.. Anyone have any ideas or directions they can point me in?????