NETGEAR EN516 - Hub - EN Manuale utente

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

Normal/Uplink

Link/Rx Partition Link/Rx Partition

Link/Rx

Power BNC

Rx AUI

CollisionPartition Partition

Partition

MODELEN524

24 PORT Ethernet Hub

10/100Mbps

Normal/Uplink

Link/Rx Partition Link/Rx Partition

Power BNC

Rx AUI

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

Link/Rx Partition Link/Rx Partition

Link/Rx

Power BNC

Rx AUI

CollisionPartition Partition

Partition

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

Link/Rx Partition Link/Rx Partition

Power BNC

Rx AUI

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

8666FA

Normal/Uplink

Link RX

Power DataCollision

(Model EN524 hub shown)

Connect a PC to the Hub

8667FA

Normal/Uplink

Link RX

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

Link/Rx Partition Link/Rx Partition

Power BNC

Rx AUI

CollisionPartitionPartition

MODEL

EN516

PORT

Ethernet Hub

10/100Mbps

Normal/Uplink

Link/Rx Partition Link/Rx Partition

Power BNC

Rx AUI

CollisionPartitionPartition

MODEL

EN516

PORT

Ethernet Hub

10/100Mbps

8664FA

Model EN524 hub

Model EN516 hub Model EN524 hub

Model EN524 hub Model EN516 hub

Normal

Uplink

Normal/Uplink

Link/Rx Partition Link/Rx Partition

Power BNC

Rx AUI

CollisionPartition Partition

MODELEN516

16PORT Ethernet Hub

10/100Mbps

8665FA

Model EN524 hub

Model EN516 hub

Normal

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 T- connector

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