3Com 3CNJ100 Installation Manual page 7

1 Switched ports Allow up to four devices to be connected to
the network.
Port number 1 is also a power-forwarding port;
it can be used with any standard networking
device as well as to power a VoIP telephone on
a network that uses IEEE 802.3af-compatible
Power Over Ethernet.
2 Slot for adapter Can be fitted with an adapter plate, which
plate can be installed with up to two pass-through
ports.
3 Adapter plate Can be used for voice or other networking
with installed applications. The port bypasses the
pass-through functionality of the switch, allowing you to
port connector set up a connection to a separate network
segment or to connect to an analog or digital
PBX telephone.
The adapter plates are available from 3Com.
However, you must purchase the connectors
from the manufacturer. See "Installing the
Adapter Plate and Pass-Through Ports" on
page 15 for more information.
4 LEDs
5 Power socket Can be used to power the Network Jack with
a local power supply (available for purchase
from 3Com); required if your network does
not support Power Over Ethernet.
About the Network Jack
Indicates network connection status.
Indicates power status.
3