3com nj225 User Guide

C

HAPTER

 1: I

NSTALLING

 

THE

 I

NTELLI

J

ACK

• MAC filtering

• 802.1x port security

• User-configured VLAN IDs for management packets

• Port-based “calendar” function

The following diagram shows the front, rear and bottom views of the IntelliJack:

1

RJ-45 switched PAN 
(personal area 
network) ports

Four 10/100 Mbps auto-negotiation ports, which the NJ225 
configures for 10 Mbps or 100 Mbps connections 
automatically (green LEDs).

2

Port LEDs and 
corresponding port 
numbers

Indicate network status of each of the four RJ-45 PAN ports.

3

RJ-45 LED

Indicates the status of the LAN connection (white cable, green 
LED). For more information, see “Checking the LEDs” on 
page 13.

4

Power LED

Indicates NJ225 power status (green). For more information, 
see “Checking the LEDs” on page 13.

5

Pass-through port

Provides a link to your LAN that passes through the NJ225 
IntelliJack.  The data or voice traffic is separate from and 
unaffected by the NJ225 switch.

6

Power-forwarding 
LED

Lights when the IntelliJack is connected to—and forwarding 
power to—an IEEE 802.3af- compliant device. For more 
information, see “Checking the LEDs” on page 13.

7

Local power supply 
cable strain relief

Local power supply cable strain relief.

8

Power socket

The NJ225 can be powered from a local power supply 
(available for purchase from 3Com). This is required if your 
network does not support Power Over Ethernet (PoE).