NETGEAR EN516 - Hub - EN User manual

Model EN516/EN524 Ethernet Hub Installation Guide
Congratulations on your purchase of the NETGEAR™Model EN516 or Model EN524 Ethernet
hub. These hubs deliver standards-based, plug-and-play networking solutions for small businesses,
home offices, and low-density workgroups of larger companies.
The Model EN516 and Model EN524 hubs have the following features:
• Sixteen (on the Model EN516 hub) and twenty-four (on the Model EN524 hub) vista
10BASE-T network ports (RJ-45) that provide 10 Mbps networking using simple unshielded
twisted pair (UTP) wiring (The vista network ports provide built-in LED indicators for at-a-
glance status checks.)
• AUI or coaxial BNC backbone support for connecting to an existing Ethernet segment or
external transceiver, or for network expansion by connecting multiple hubs together using
twisted pair or coaxial cabling
• Uplink port for connecting to other hubs using simple straight-through cables
• Built-in 100 to 240 V AC switching power supply, eliminating the need for bulky wall
transformers
• Clear front-panel light-emitting diode (LED) indicators, providing the individual ports and
overall hub status
• Plug-and-play installation with no software to configure
• Complete hub functions including packet retiming, collision detection, preamble
regeneration, and fragment extension
• Automatic partitioning and reconnection of a port that has excessive collisions or is jabbering
• Automatic polarity detection for recognizing and correcting incorrect polarity on the receive
pair
• Compact design, enabling easy tabletop or rack-mounting installation
• Limited five-year warranty on the unit and one-year warranty on the power supply
Start Here
Features

Model EN516/EN524 Ethernet Hub Installation Guide
Verify that your package contains the following:
• Model EN516 hub or Model EN524 hub
• Rack mount kit that includes eight small screws, four largescrews, four spacers, and two rack
mount brackets
• Four rubber footpads
• BNC T-connector and BNC 50 Ωterminator
• Installation guide
• Warranty & Owner Registration Card
•Powercord
Package Contents
8668FA
Rubber
footpads
Power
cord
BNC 50 Ω
terminator
BNC T-connector
Rack mount kit
Installation guide,
Warranty & Owner
Registration Card
Model EN516 hub Model EN524 hub
or
Normal/Uplink
24
12
Link/Rx Partition Link/Rx Partition
17
5
Link/Rx
Power BNC
Rx AUI Rx
CollisionPartition Partition
Partition
13
1
MODELEN524
24 PORT Ethernet Hub
10/100Mbps
Normal/Uplink
16
8
Link/Rx Partition Link/Rx Partition
9
1
Power BNC
Rx AUI Rx
CollisionPartition Partition
MODELEN516
16PORT Ethernet Hub
10/100Mbps

Model EN516/EN524 Ethernet Hub Installation Guide
The instructions provided in this guide are for installing and using the Model EN516 hub and the
Model EN524 hub.
Vista 10BASE-T Network Ports with Built-in LEDs
The front panel of the Model EN516 hub has 16 RJ-45 10BASE-T ports, and the Model EN524
hub has 24 RJ-45 10BASE-T ports. Two LEDs—the Link/Rx LED and the Partition LED—are
built into each 10BASE-T port on both models.
Product Illustration
8669FA
Normal/Uplink
24
12
Link/Rx Partition Link/Rx Partition
17
5
Link/Rx
Power BNC
Rx AUI Rx
CollisionPartition Partition
Partition
13
1
MODELEN524
24 PORT Ethernet Hub
10/100Mbps
Power LED BNC Rx LED
AUI Rx LED
Power LED BNC Rx LED
AUI Rx LED
Partition LED (for AUI)
vista 10BASE-T
network ports
Front Panel of the Model EN524 hub
Front Panel of the Model EN516 hub
Partition LED (for BNC)
Collision LED
Normal/
Uplink push
button
Normal/Uplink
16
8
Link/Rx Partition Link/Rx Partition
9
1
Power BNC
Rx AUI Rx
CollisionPartition Partition
MODELEN516
16PORT Ethernet Hub
10/100Mbps
Partition LED (for AUI)
vista 10BASE-T
network ports
Partition LED (for BNC)
Collision LED
Normal/
Uplink push
button
8670EA
Link/Rx
LED Partition LED

Model EN516/EN524 Ethernet Hub Installation Guide
LEDs
The table below describes the activity of the LEDs.
Normal/Uplink Push Button
The Normal/Uplink push button allows you to select Normal (MDI-X) for direct PC connection.
The push button also allows you to select Uplink (MDI) wiring for connection to a hub or a switch
for port 16 on the Model EN516 hub and for port 24 on the Model EN524 hub. This uplink
configuration eliminates the need to use a crossover cable. Ports 1 through 15 on the Model
EN516 hub and ports 1 through 23 on the Model EN524 hub are permanently configured for
normal wiring for connection to a PC.
Rear Panel
The rear panel of each hub has two ports: the AUI port and the BNC port. You can use the AUI
port with the appropriate transceiver to connect the hub to a backbone network using thin coaxial
cable, thick coaxial cable, fiber optic cable, or 10BASE-T wiring. You can use the BNC port to
connect to a backbone network or other PCs using thin coaxial cable. The rear panel also includes
an AC power receptacle. The hub accepts between 100 and 240 V AC, 50/60 Hz.
Label Color Activity Description
Power Green On Power is supplied to the hub.
Collision Amber Blinking Data collision is occurring on the network. Note that
occasional collisions are normal.
BNC Rx Green Blinking There is incoming data on the BNC port.
Partition
(for BNC) Amber On The BNC port is partitioned because of excessive collisions or the BNC port is not connected.
AUI Rx Green Blinking There is incoming data on the AUI port.
Partition
(for AUI) Amber On The AUI port is partitioned because of excessive collisions or because the signal quality error (SQE) test
function is not disabled on the transceiver.
Link/Rx
(located on the top left
corner of each vista
10BASE-T port)
Green On
Blinking
The link between this port and the connected device is
good.
There is incoming data on the port.
Partition
(located on the top
right corner of each
vista 10BASE-T port)
Amber On The port is partitioned because of excessive collisions.
8143FA
AUI BNC
100-240 VAC 50-60 Hz 0.2A
AUI port BNC port Power receptacle

Model EN516/EN524 Ethernet Hub Installation Guide
Before you begin installing your hub, prepare the installation site. Make sure your operating
environment meets the operating environment requirements of the equipment.
Characteristic Requirement
Temperature Ambient temperature between 0°and 40°C (32°and 104°F).
No nearby heat sources such as direct sunlight, warm air exhausts, or
heaters.
Operating humidity Maximum relative humidity of 90%, noncondensing.
Ventilation Minimum 2 inches (5.08 cm) on all sides for cooling.
Adequate airflow in room or wiring closet.
Operating conditions At least 6 feet (1.83 m) to nearest source of electromagnetic noise (such
as photocopy machine or arc welder).
Service access Minimum 12 inches (19.68 cm) front and back for service access and
maintenance.
Front and back clearance for cables and wiring hardware such as
punchdown blocks.
Power Adequate power source within 6 feet (1.83 m).
Tabletop requirements Flat area approximately 13 inches (33.0 cm) by 8 inches (20.3 cm).
Rack requirements Standard 19-inch (48.26 cm) EIA equipment rack, with supplied mounting
bracket hardware; 1.0 EIA rack-mount spaces needed for each
NETGEAR hub.
Wiring hardware Wiring hardware, such as punchdown blocks or patch panels, should be
complete before installing the hub.
Installation Procedures
Prepare the Site

Model EN516/EN524 Ethernet Hub Installation Guide
To install your hub on a flat surface, you do not need any special tools. Install the rubber footpads
that are included in the package. Be sure the hub is positioned with at least 2 inches of space on all
sides for ventilation.
To install the hub in a rack, you need two Phillips screwdrivers: one size for the screws that attach
the brackets to the hub and another size for the screws that attach the brackets to the mounting
rack. 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.
You can connect PCs, Apple Macintosh computers, UNIX workstations, or any device equipped
with a 10BASE-T Ethernet interface to the RJ-45 ports on your hub by using twisted pair Ethernet
cables.
To connect any of the RJ-45 ports on your hub to a PC, use a regular straight-through UTP cable.
If you are connecting using port 16 on the Model EN516 hub or port 24 on the Model EN524 hub,
set the Normal/Uplink push button to Normal.
Note: Ethernet specifications limit the cable length between your PC or server and the
hub to 328 feet (100 meters) in length.
Install the Hub
2
8666FA
Normal/Uplink
24
12
Link RX
Link RX
17
5
Link RX
13
1
Power DataCollision
(Model EN524 hub shown)
Connect a PC to the Hub
8667FA
Normal/Uplink
24
12
Link RX
Link RX
17
5
Link RX
13
1
Power DataCollision
Power
DataCollision
(Model EN524 hub shown)

Model EN516/EN524 Ethernet Hub Installation Guide
Cascading refers to connecting hubs together to increase the number of ports or the number of
users supported on the network. The 10BASE-T, BNC, or AUI ports can be used to cascade hubs
together.
Connect to a Network Using the 10BASE-T Ports
The twisted pair cable extended from a 10BASE-T port (or UTP port) is called a twisted pair
segment and can be up to 100 meters (m) in length. The 10BASE-T ports, with the exception of
port 16 on the Model EN516 hub and port 24 on the Model EN524 hub, are MDI-X (or Normal)
ports. Use the following table as a guide for selecting the appropriate network cable.
Set the Normal/Uplink Push Button
If you are connecting to port 16 on the Model EN516 hub or to port 24 on the Model EN524 hub,
use the following table. Determine the type of cable to use and how to set the Normal/Uplink push
button for either port 16 or port 24.
Connecting Port
on the Hub Connecting Device Cable Used
Model EN516 hub:
Ports 1–15 PC, server, or router Straight-through cable
Ports 1–15 Hub or switch Crossover cable
Model EN524 hub:
Ports 1–23 PC, server, or router Straight-through cable
Ports 1–23 Hub or switch Crossover cable
Connecting Port Connecting Device Cable Used
Port 16 or port 24 set to Normal PC, server, or router Straight-through cable
Port 16 or port 24 set to Uplink Hub or switch Straight-through cable
Connect the Hub to a Network

Model EN516/EN524 Ethernet Hub Installation Guide
You can cascade hubs together through any of the ports. The following illustration shows
cascading hubs together in a hierarchical star through the 10BASE-T ports and indicates the
setting of the Normal/Uplink push button on each hub.
The following illustration shows cascading hubs together daisy-chain style and indicates the
setting of the Normal/Uplink push button on each hub.
Note: Ethernet specifications limit the number of hubs with twisted pair links in any
communication path to five, as shown in the example. When PC “A” communicates
with PC “B,” the communication path goes from hub 4 to hub 2, to hub 1, to hub 3,
and then to hub 5 (or five paths).
Normal/Uplink
16
8
Link/Rx Partition Link/Rx Partition
9
1
Power BNC
Rx AUI Rx
CollisionPartitionPartition
MODEL
EN516
16
PORT
Ethernet Hub
10/100Mbps
Normal/Uplink
16
8
Link/Rx Partition Link/Rx Partition
9
1
Power BNC
Rx AUI Rx
CollisionPartitionPartition
MODEL
EN516
16
PORT
Ethernet Hub
10/100Mbps
8664FA
Model EN524 hub
Model EN516 hub Model EN524 hub
Model EN524 hub Model EN516 hub
1
23
4
AB
5
Normal
Uplink
Uplink
Uplink
Uplink
Normal/Uplink
16
8
Link/Rx Partition Link/Rx Partition
9
1
Power BNC
Rx AUI Rx
CollisionPartition Partition
MODELEN516
16PORT Ethernet Hub
10/100Mbps
8665FA
Model EN524 hub
Model EN524 hub
Model EN516 hub
Normal
Uplink
Uplink

Model EN516/EN524 Ethernet Hub Installation Guide
Connect to a Network Using the BNC Port
The BNC port on the rear panel of the hub is used for connecting to a thin coaxial segment. You
can connect other Model EN516 or Model EN524 hubs, servers, workstations, or other devices to
the BNC port. A BNC-T connector is inserted in the port, and the 50 Ωterminator terminates the
connection at each end device. By using the BNC port for cascading, you treat each connected hub
as just another node on the coaxial segment.
The separation marks in the coaxial cable between the hubs in this illustration represent the
incorporation of other devices and show that interconnection is not limited to hubs.
Note: Ethernet specifications limit a BNC segment to 30 BNC connections, specify a
minimum of 1.64 feet (0.5 m) between any two stations, and limit segments to 607 feet
(185 m) in length.
8074FA
BNC 50 terminator
BNC 50 terminator
BNC T- connector