Just came back from troubleshooting a phone outage (new NEC DT300 series IP phones just installed brand new 2 weeks ago) and it appears that two phones next to each other have melted down their jacks and burned the wire about 1 inch back from the RJ45 jack on one. The other just started melting inside the jack itself around the pins.
I have contacted Legrand (who manufactures the ON-Q series jack) to see what they think.
I could understand a bad punch-down or wiring fault on one jack, but not two simultaneously that seems unlikely to me.
Phones are draw 2.2 watts each.
Anybody see this type of failure in the field with POE devices?