I have a question for you… I have a notel phone system with the t7318 phones, I have a total of 10 phones, 8 work fine and I have two that appear not to be receiving power… when I take one of the phones from another location and put it where the dead phone was it does not work, but the phone from the dead phone area where the other phone works it works there… could it be a power problem that is isolated… or is it the jack that the phones are plugged into Any insight would be appreciated michael