802.af | Article about 802.af by The Free Dictionary
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802.3afAn IEEE standard for powering network devices via Ethernet cable. Also known as "Power-over-Ethernet," it provides 48 volts over 4-wire or 8-wire twisted pair. The 8-wire cable uses one twisted pair for the power, while the 4-wire transmits the power over the same pair as the data, but uses different frequencies. Designed with IP phones and wireless access points in mind, it allows devices such as these to be placed in locations that have no electrical outlets. Only the Ethernet cable needs to be connected to the device. See inline power.
References in periodicals archive
The eNterprise VoIP telephones leverage IEFT's Session Initiation Protocol (SIP) for IP broadband connectivity, IEEE 802.
4 watts of power per port, ADC's midspan controllers support a broad variety of Power-Over-Ethernet enabled devices by detecting device presence and transmitting appropriate power according to IEEE 802.
Unveiled at NetWorld+Interop in Las Vegas, the FlightLite 100 is the first optical wireless product to incorporate fully IEEE 802.