We have 20 DPH-125MS phones, a base unit and 2 gateways. It seems that phones randomly "go offline" from time to time. About 1 to 2 phones every day.
Phone will NOT show the username and extension #, and one cannot call out (dialing 9 gives error). A reboot fixes.
We used to get DHCP errors which will take out the PC connected to the PC RJ45 port, but since setting ALL phones to STATIC IPs, DHCP errors are gone. However, phones still loose "connection" with base requiring a reboot.
Firmware on all phones are latest. DPH-125MS = 1.14.25 (8/14/2009).
What can cause a phone to reboot or go offline like this? What can I check.