you have to use the little power cord that comes with the 9630G, has an ethernet RJ45 on 1 end, with pins 7&8 wired, and the other end is a mini DC power connector that plugs into the bottom of the phone.
This is the only way to use power bricks with the "G" phones.
Either that, or a 802.11af compliant ethernet switch, which has the power sensing circuitry on pair 7&8.
Mitch
AVAYA Certified Expert