3Com IntelliJack NJ1000 Quick Start Manual page 5

This diagram shows the rear view of the NJ1000. Table 2 on page 5 describes the
features.
Table 2
Feature
1 Two Pass-through
ports
2 Gigabit Ethernet
uplink port
Observe All Safety Precautions
This equipment must be installed in compliance with local and national building
codes, regulatory restrictions, and FCC rules. See the section "Regulatory Notices" at
Description
The pass-through ports bypass the functionality of the switch and are
directly wired to the associated pass-through ports on the front of the
unit. Pass-through ports allow connection to a separate network
segment or connection of an analog or digital PBX telephone.
Connects the NJ1000 to the network.
5