p/n 4000087299 v.I
2.2.5 USING 802.3AF-2003 POE FOR VOIP TELEPHONES
Power over Ethernet (“PoE”) allows units which supports it to replace the usual “wall wart” power
supplies that are commonly used for most electrical products. To take advantage of this, a PoE-
capable switch must be used, the end-point must support PoE and the length of the cabling between
the two may not exceed 100 meters, as per 802.3af-2003. If cable lengths greater than this is
desired, please consider distributing one or more switches closer to the end-point, make use of a
PoE-capable repeater or use a PoE-injector closer to the end-point.
For PoE, we recommend category 5 cabling or better.
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