Avaya G650 Media Gateway with about 30 Avaya 9611G phones. This was a working phone system but now does not work for the most part. All the phones have normal screens but cannot make or receive calls. There is no sound at all, not even a hiss. Actually of the 30 phones, one still works. When you call a dead phone, a red light flashes once in the upper right hand corner. But then nothing.
Any ideas?
