3Com 3CNJ100 Installation Manual page 15

The multi-port Ethernet power supply from 3Com connects
to an existing Ethernet or Fast Ethernet infrastructure with
standard Category 5 or Category 5e UTP cabling, and powers
up to 24 Network Jacks. See "Obtaining Optional Components"
on page 7 for ordering information. For complete installation
instructions, see the multi-port Ethernet power supply
documentation.
Network
switch
To network
hub/switch
To
Network
Jack
1 1
2 2
3 3
4 4
Installing the Network Jack
Wiring closet
Multi-port Ethernet
power supply
11