Hi Sandy,
1. Yes It can work but is is recommaned to use a Power injector.
When deployed using a Power over Ethernet (PoE) specification, the power drawn from the power sourcing equipment will be higher by some amount dependent on the length of the interconnecting cable.
(Cisco AP3700 power injectors (AIR-PWRINJ4=))
2. U must mention requirement for external antenna according to your deployment scneario.
3. power injectors (AIR-PWRINJ4=)) -- this support both AP(3600 and 3700).
Hope it helps.
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