The units were setup and used one year ago and then deactivated. Upon reactivation i reset all units to default. I change the IP's to match my home network IP as noted in the instructions. I am able to get into the units via web interface as mentioned in the instructions. However when i try to get the units to talk to each other i get no activation of the ts-480 and get the blinking yellow light denoting SIP failure. I also get the alarm tone from the control head.
When i use the default IP's on the units they communicate and i can activate the 480 with all functions operating normally.
What simple step am i missing here. HELP