Netgear EN308TC Quick Start Manual
Start Here
Start Here
Congratulations on your purchase of the NETGEAR™ Model EN308
Ethernet hub. This hub delivers standards-based, plug-and-play networking
solutions for small businesses, home offices, and low-density workgroups of
larger companies.
Features
The Model EN308TC hub has the following features:
• Eight 10BASE-T network ports (RJ-45) that provide 10 megabit per second
• Coaxial BNC backbone support for connecting to an existing Ethernet
• Built-in LED indicators for at-a-glance status checks by networks ports
• Uplink port for connecting to other hubs using simple straight-through
• Front-panel LED indicators to monitor overall hub status
• Plug-and-play installation with no software to configure
• Complete hub functions including packet retiming, collision detection,
• Automatic partitioning and reconnection of a port that has excessive
• Automatic polarity detection for recognizing and correcting incorrect
• Compact design, enabling easy tabletop or rack-mounting installation
• Internal power adapter
• Limited five-year warranty
Features
(Mbps) networking using simple unshielded twisted pair (UTP) wiring
segment or external transceiver, or for network expansion by connecting
multiple hubs together using coaxial cabling
cables
preamble regeneration, and fragment extension
collisions or is jabbering
polarity on the receive pair
TC
Model EN308TC Ethernet Hub Installation Guide
Package Contents
Package Contents
Model EN308TC hub
100M 10M
Normal/Uplink
87654321
BNC 50
terminator and
On = Link Blinking = Activity
50
HM
O
BNC T-connector
Mounting kit
Installation guide,
Warranty & Owner
Registration Card,
and Support
Information Card
Verify that your package contains the following:
• Model EN308TC hub
• Mounting kit (for wall installation)
• BNC T-connector and BNC 50 Ω terminator
• This installation guide
• Warranty & Owner Registration Card
• Support Information Card
• Power cord
BNC
100-240 VAC, 50-60Hz 0.2A max.
Power
cord
9125FA
Model EN308TC Ethernet Hub Installation Guide
Product Illustration
Product Illustration
Front Panel
The front panel of the Model EN308
activity status of the hub.
For ease of use, the front panel 10BASE-T LEDs that indicate link, receive, or
partition activity are duplicated on the 10BASE-T ports on the rear panel. Use
the rear panel LEDs when setting up the device, and use the same LEDs on the
front panel for monitoring the ports when the hub is positioned in place and set
up.
COL
(Collision)
LED
PWR COL
PORT
8
10 Mbps
PWR
(Power)
LED
Ethernet Hub
TC
hub contains LEDs that monitor the
10BASE-T
On=Link, Blinking=Receive
1
234
LEDs
5678
Partition
BNC Rx
LED
MODEL
EN308TC
Rx
Partition
BNC Partition
LED
9117FA
Front Panel LEDs
The table below describes the activity of the front panel LEDs.
Label
Pwr (Power) Green On Power is supplied to the hub.
Col (Collision) Amber Blinking Data collision is occurring on the network. Note
10BASE-T
LEDs
Link/Receive
(For ports 1
through 8)
Partition Amber On The port is partitioned because of excessive
BNC LEDs
Rx Green Blinking There is incoming data on the BNC port.
Partition Green On The BNC port is partitioned because of
Color Activity Description
that occasional collisions are normal.
Green On The link between this port and the connected
port is good.
Blinking There is incoming data on the port.
collisions.
excessive collisions.
Model EN308TC Ethernet Hub Installation Guide
Rear Panel
The rear panel of the Model EN308
TC
hub has eight RJ-45 10BASE-T ports, a
BNC port that you can use to connect to a backbone network or other PCs using
thin coaxial cable, and a Normal/Uplink push button.
The rear panel also includes a DC power receptacle.
Normal/Uplink
BNC port Power receptacle
push button
100M 10M
Normal/Uplink
87654321
On = Link Blinking = Activity
BNC
100-240 VAC, 50-60Hz 0.2A max.
10BASE-T
ports
9118FA
RJ-45 10BASE-T Network Ports with Built-in LEDs
Two LEDs—the Link/Rx (Receive) LED and the Part (Partition) LED—are
built into each 10BASE-T port.
Link/Rx
(Receive)
LED
Part
(Partition)
LED
8724EC
The table below describes the activity of the LEDS.
Label
Link/Rx
(Located in the top
left corner of each
10BASE-T port)
Part
(Located in the top
right corner of each
10BASE-T port)
Color Activity Description
Green On The link between this port and the connected
port is good.
Blinking There is incoming data on the port.
Amber Blinking The port is partitioned because of excessive
collisions.
Model EN308
TC
Ethernet Hub Installation Guide
Normal/Uplink Push Button for Port 8
The Normal/Uplink push button allows you to select Normal (MDI-X) wiring
for direct PC connection. The push button also allows you to select Uplink
(MDI) wiring for connection to another hub or to a switch through port 8 on the
Model EN308
TC
hub. This uplink configuration eliminates the need to use a
crossover cable. The other 10BASE-T ports are permanently configured for
normal wiring for connection to a PC.
Installation Procedures
1. Prepare the Site
Before you begin installing your Model EN308
Installation Procedures
Prepare the Site
TC
hub, prepare the installation
site. Make sure your operating environment meets the operating environment
requirements of the equipment.
Characteristic
Temperature
Operating humidity Maximum relative humidity of 90%, noncondensing.
Ventilation Minimum 2 inches (5.08 cm) on all sides for cooling.
Operating
conditions
Service access Minimum 12 inches (19.68 cm) front and back for service access
Power Adequate power source within 6 feet (1.83 m).
Wiring hardware Wiring hardware, such as punchdown blocks or patch panels,
Requirement
Ambient temperature between 0° and 40° C (32° and 104° F).
No nearby heat sources such as direct sunlight, warm air
exhausts, or heaters.
Adequate airflow in room or wiring closet.
At least 6 feet (1.83 m) to nearest source of electromagnetic noise
(such as photocopy machine or arc welder).
and maintenance.
Front and back clear ance f or cab les and wiring hardware such as
punchdown blocks.
should be complete before installing the hub.
2. Install the Hub
Install the Hub
To install your hub on a flat surface, you do not need any special tools. Be sure
the hub is positioned with at least 2 inches of space on all sides for ventilation.
To install the hub on a wall, measure the distance between the mounting holes
on the back of the hub and mark the wall to match the location of the mounting
holes on the hub. At the marked location, screw into the wall the two screws that
you received with the mounting kit included in your package contents. Be sure
to choose a location that is near the devices to be connected, is close to an
electrical outlet, and provides at least 2 inches of space all around the hub for
ventilation.
Model EN308
TC
Ethernet Hub Installation Guide
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