User's Manual

About Power Over Ethernet

Airespace equipment supports 802.3af-compliant Power over Ethernet

(PoE), which can reduce the cost of discrete power supplies, additional

wiring, conduits, outlets, and installer time. PoE also frees installers from

having to mount the Airespace APs near AC outlets, which allows more

flexibility in positioning Airespace APs for maximum coverage. Finally,

systems with fewer wires generally have lower failure rates.

When you are using PoE, the installer runs a single CAT5 cable from each

Airespace AP to the PoE-equipped Airespace Switch or other network

element, or to a PoE power hub. When the PoE equipment determines that

the Airespace AP is a powered device, it sends 48 VDC over unused pairs

in the Ethernet cable to the Airespace AP.

Airespace APs can receive power from the Airespace Switch, or any other

network device conforming to the IEEE 802.3af standard.

When a Airespace Switch is operated in Appliance Mode, it can be

ordered without PoE, as the switching element it is connected through can

be equipped with internal PoE or an external PoE hub. When a Airespace

Switch is operated in Direct Connect Mode, it can be ordered with internal

PoE or an external PoE hub. Contact Airespace for recommended external

PoE hubs.