Hello Guys, really need your help. We did some Wiring closet re-arranging and since then few of our m3903 phones have nothing on the display. When we dial the number at first there was a busy signal but after recreating the phones in Avaya Unified communication we get ringing tone but the phones are still dead on the reciever end. When we plug it directly into the patch panels in the wiring closet, nothing on the display as if the phone is not getting power.