3COM 3CNJ95 User Manual
NJ95
Network Jack
User Guide
3CNJ95
User Guide
NJ95 Network Jack
3CNJ95
4-port 10/100 Mbps Unmanaged
Ethernet Switch
http://www.3com.com/
http://www.3com.com/productreg
09-2264-000
Published October 2002
3Com Corporation ■ 5400 Bayfront Plaza
Santa Clara, California ■ 95052-8145 ■ U.S.A.
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Contents
1. Package Contents 2
2. NJ95 Description 3
3. Installing the NJ95 Network Jack 5
4. Un-Installing the NJ95 Network Jack 15
Appendix A: Detail Description of NJ95 19
Appendix B: Wall Plate Dimensions 21
Appendix C: Setting up the Power Supply 23
Appendix D: Specifications 31
Appendix E: Obtaining Optional Components 35
Appendix F: Setting up the Network Cabling 37
Appendix G: Troubleshooting the NJ95 39
Appendix H: Contacting Technical Support 41
3Com Corporation Limited Warranty and Regulatory
Compliance Information
User Guide
The 3Com® Network Jack is a platform that provides
connectivity at the edge of the network infrastructure. The NJ95
Network Jack, is a member of this family of products.
The NJ95 Network Jack is a 4-port, un-managed Fast Ethernet
switch that fits into most standard data port openings. It has a
modular design consisting of a “main unit” and a “wall plate”.
The NJ95 Network Jack quadruples port connections where a
single port (and cable) already exists in the wall. Expanding port
connections with the 3Com Network Jack is a less expensive and
less disruptive alternative to running additional cabling. Also, the
3Com Network Jack is installed in the wall, making it more
secure and out of the way than deploying a remote desktop
switch.
The NJ95 Network Jack allows up to four networking devices,
such as computers, printers, Voice Over IP (VoIP) telephones, and
scanners, to be connected to the network via its own Ethernet
port. An optional port is available that allows an additional
device to be connected to a separate network segment through
the same NJ95.
The NJ95 needs no software to operate and no configuration. All
ports feature 10/100 Mbps auto-negotiation, which configures
the NJ95 Network Jack for 10 Mbps or 100 Mbps connections
automatically.
Before you begin installation, register your product at:
www.3com.com/support.
1
User Guide
1. Package Contents
Single Pack & Multi Pack
The NJ95 Network Jack is available in single and 20-packs.
Before you begin the installation, make sure you familiarize
yourself with the following items, which are included with the
NJ95:
■
NJ95 Main Unit
■
Universal “wall plate” (1 per NJ95) – Screws on to the
Outlet Box in the wall/raceway and on which the NJ95 Main
Unit is mounted (Optional: Manufacturer Specific “wall
plate” can be purchased separately - For a list of supported
manufacturers and connectors, go to www.3com.com/
products)
■
M3.5 x 30mm machine screws (2 per NJ95) for mounting
the Universal wall plate to the wall or office cubicle in UK.
■
M2.4x8mm security screw (1 per NJ95) for securing the
NJ95 Main unit to the Universal wall plate.
■
RJ-45 Male to Female coupler cable (1 per NJ95) for
connecting the NJ95 Main unit to the Network Ethernet
cable (required only in special circumstances, if your
network cable is terminated with a female RJ-45
connector).
■
Installation guide (1 per package).
For “Optional Components” – which maybe useful for some
special installations – see Appendix E.
2
2. NJ95 Description
2. NJ95 Description
The following diagram shows the front view of the NJ95 and
both the Universal (2a) and Manufacturer Specific (2b) wall
plates. (see descriptions below)
Figure 1: NJ95 Feature Description
3
User Guide
1 NJ95 Main Unit Allow up to four devices to be connected to the
network.
2a Universal Wall
Plate
Used to mount the main unit – pass through “wall
plate” and non manufacturer-specific.
(Included)
2b Manufacturer-
Specific Wall Plate
(purchased
separately – For
available plates see
www.3Com.com/
products and
Appendix E)
Used to Mount the Main Unit – Mount the
specific connectors on the Wall Plate. One of the
connectors would serve to connect the switched
ports to the Network.
The second connector referred to as an optional
port bypasses the functionality of the switch.
Allows connection to a separate network segment
or to an analog or digital PBX telephone network
3 LEDs Indicates network connection status.
Indicates NJ95 power status.
4 Power Socket NJ95 can be powered from a local power supply
(available for purchase from 3Com); required if
your network does not support Power Over
Ethernet (PoE).
4
3. Installing the NJ95 Network Jack
3. Installing the NJ95 Network Jack
Figure 2: NJ95 Network Jack Main Unit
1
Install the Universal “wall plate” or Manufacturer-specific
“wall plate”.
2
Mount the NJ95 Main unit on the Universal or
Manufacturer-specific “wall plate”.
3
Set up the power supply (Appendix C).
5
User Guide
1a. Installing the Universal wall plate
Figure 3a: Installing the Universal Wall Plate
1
Thread the RJ-45 Connector attached to the wiring closet
cable through the opening in the Universal wall plate (Fig.
3a).
or
If necessary connect the coupler cable (Male RJ-45) to the
female RJ-45 connector attached to the Network cable and
thread it through the Universal wall plate (Fig. 3b).
6
3. Installing the NJ95 Network Jack
Figure 3b: Installing the Universal Wall Plate (with Coupler Cable)
2
Mount the Universal wall plate to the Outlet box with the
screws provided.
7
User Guide
1b. Installing the Manufacturer-specific wall plate
Figure 4: Installing the Manufacturer-specific Wall Plate
1
Mount the manufacturer-specific connectors (which are
connected to the network cabling) on the manufacturerspecific wall plate.
2
Mount the manufacturer-specific wall plate to the Outlet
box with the screws provided.
CAUTION:
When the Wall plate is mounted, make sure
there is enough space inside of the junction box for an
acceptable bend radius on the cable.
8
3. Installing the NJ95 Network Jack
2a. Mount the NJ95 Main unit on the Universal or
Manufacturer-specific wall plate.
Figure 5: Rear view of NJ95
1 Ethernet Uplink port Connects the NJ95 to the network.
Make sure the port on the network switch to
which the NJ95 is connected is configured as a
standard MDI port.
2 Screw Tab Guide Used to align and retain the Main unit to the Wall
3 Main Latch Used to retain the Main unit to the Wall Plate
4 Alignment Tabs Used to align the Main unit to the Wall plate
Plate
9
User Guide
2b. Mounting the NJ95 Main unit to the wall plate
Figure 6a: Mounting the NJ95 Main unit to the Universal Wall plate
10
3. Installing the NJ95 Network Jack
Figure 6b: Mounting the NJ95 to the Manufacturer-specific Wall plate
1 Groove for RJ-45
Jack release
Insert a pin through the groove to release the RJ45 plug
2 Screw Tab Used to align and retain the main unit to the wall
plate
3 Slots for Alignment
Align tabs on main unit to the wall plate slots
Tabs
11
User Guide
1
Connect the main unit RJ-45 plug into the female RJ-45
connector at the end of the wiring closet cable/coupler
cable (Universal wall plate) or align it with the right most RJ45 connector (Manufacturer-specific wall plate).
2
Align the Screw Tab (Item #2) with the opening in the main
unit.
3
Align the Alignment Tabs on the main unit with the slots
(Item #3) in the Wall plate.
4
Snap the Main unit into the Wall plate).
2c. Fastening the NJ95
Figure 7: Securing the NJ95 Main unit to the Wall plate
12
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