3Com IntelliJack NJ1000 Quick Start Manual page 3

computers, servers, access points, IP cameras, and Voice Over IP (VoIP) telephones to
the network through a single Ethernet connection.
All 5 LAN ports feature 10/100/1000 Mbps with auto-negotiation and auto MDI-X.
The NJ1000 also provides two pass-through ports that can be used to connect two
additional devices to separate network segments through the same unit.
Power is provided to the NJ1000 either through the uplink port via 802.3at or
802.3af PoE (Power over Ethernet) or locally via an optional, external 48V DC power
supply, 3CNJ1000PSL.
NOTE: Power Over Ethernet (PoE) is a method for providing power to equipment over
an Ethernet cable, allowing a device to receive both data and power from the same
network cable. PoE power may be provided on port 1 or port 2 of the NJ1000 if there
is sufficient power available to the system. See the section "Understand the PoE
Capabilities for Port 1 and Port 2" later in this guide for details.
NJ1000 Basics
This diagram shows the front and side views of the NJ1000. Table 1 on page 4
describes the features.
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