3Com 3CNJ205 User Manual page 63

Features
Power Over Ethernet
Local power supply
Voice Over IP (VoIP)
Power forwarding
Compatible with IEEE 802.3af
Required for networks that do not support
Power Over Ethernet
Compatible with VoIP.
Power forwarding Port number 4 can be
used with any standard networking device
as well as to power a device such as a VoIP
telephone on a network that uses IEEE
802.3af-compatible Power Over Ethernet.
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