NETGEAR DS108 - Hub User manual

Model DS108 Dual Speed Hub Installation Giude

The NETGEAR Model DS108 Dual Speed Hub is a network hub that enables users to mix and

match 10 and 100 megabits per second (Mbps) devices on the same network. This capability

eliminates the high cost and complexity of separate network equipment for 10 and 100 Mbps

users. The Model DS108 hub is ideal for small networks in transition from 10 to 100 Mbps and for

linking networks operating at different speeds.

The Model DS108 hub connects PCs to share printers, files, Internet access, and e-mail

communications. Each network port coordinates with the connected PC to run at 10 or 100 Mbps,

making network configuration and upgrade effortless. In addition, the 10 and 100 Mbps network

segments are internally bridged to form one network, providing full connectivity among all users.

The Model DS108 hub has the following key features:

• Per port, autosensing, dual-speed (10/100 Mbps) operation

• IEEE 802.3u standard compliance for interoperation with all 100BASE-TX Fast Ethernet

(100 Mbps) products and 802.3i standard compliance for interoperation with all 10BASE-T

Ethernet products

• Easy Plug-and-Play installation with no software to configure, saving time and minimizing

the potential for configuration errors

• Ability of each port on the hub to independently detect the speed of the attached device and

to automatically connect at the appropriate speed

• Internally bridged 10 and 100 Mbps network segments to form one network, providing full

connectivity among all users

• Chassis equipped with:

– Eight 10BASE-T or 100BASE-TX ports providing fast information exchange, resource

sharing, and client or peer-to-peer communication using simple Category 5 UTP wiring

– Built-in vista LEDs on each network port clearly indicating individual port status

– Additional LEDs providing network traffic status for the hub

– Two LED bar graphs providing online status of network utilization and alerting you to

potential network overload

– Normal/Uplink push button for simplifying network extension

• Compact, durable design that enables tabletop or wall mounting

• External power adapter that enables quiet, reliable operation without the need for cooling

fans

• Limited five-year warranty on the hub and one-year warranty on the power adapter

Start Here

Features

Model DS108 Dual Speed Hub Installation Giude

Verify that the package contains the following items:

• Model DS108 hub

• Wall mount hardware

• Rubber footpads for tabletop installation

• Warranty & Owner Registration Card

• Power adapter

Caution: Use the appropriate power cord as required by your national electrical codes

and ordinances.

Package Contents

8227FA

Wall mount

hardware

Rubber

footpads

Installation guide,

Warranty & Owner

Registration Card

Normal/Uplink

Link RX

12345678

100 Mbps

10 Mbps

Col

Pow

Model DS108 hub

Power

adapter

Model DS108 Dual Speed Hub Installation Giude

Normal/Uplink

On - Link Blinking = Receive

100M 10M

34 5678

Pow

110 20 >40

Utilization%

Col

10 Mbps

100 Mbps

Auto 10/100 Mbps

DUAL SPEED

DUAL SPEED HUB

DS108

8228FA

Model DS108 hub

100 Mbps

10 Mbps

Model RT328

ISDN Router

Network

printer

ISDN

Power

user

PCs

Servers

Typical Applications

Product Illustration

Front Panel of the Model DS108 Hub

Power LED

10 Mbps Collision LED

10 Mbps

Utilization LEDs

Normal/Uplink

On - Link Blinking = Receive

100M 10M

34 5678

Pow

110 20 >40

Utilization%

Col 10 Mbps

100 Mbps

Auto 10/100 MbpsDUAL SPEED

DUAL SPEED HUB DS108

Normal/Uplink

push button

vista RJ-45

network ports

100 Mbps

Utilization LEDs

100 Mbps Collision LED

8225FA

Model DS108 Dual Speed Hub Installation Giude

Front-Panel LEDs

The Model DS108 hub provides front-panel LEDs for monitoring individual ports and hub status.

The following table describes the front-panel LEDs and their functions.

Vista RJ-45 Network Ports with Built-in LEDs

The front panel of the Model DS108 hub provides eight vista RJ-45 network ports. These standard

RJ-45 connectors accept two-pair or four-pair Category 5 unshielded twisted pair (UTP) copper

wiring (only two pairs are used). The RJ-45 connector uses an 8-pin interface. Two LEDs are

positioned at the top corners of each RJ-45 connector. The left indicator is the 100 Mbps Link/

Receive LED, and the right indicator is the 10 Mbps Link/Receive LED.

Rear Panel

The rear panel of the Model DS108 hub has a ground clip and a receptacle for the power adapter.

Label Color Activity Description

Power Green On Power is supplied to the hub.

Collision

10 Mbps Amber On Data collision is occurring on the 10 Mbps network segment

(some collisions are normal).

100 Mbps Amber On Data collision is occurring on the 100 Mbps network

segment (some collisions are normal).

Utilization%

10 Mbps Green Blinking Indicates the amount of data traffic on the 10 Mbps segment.

(If a 100 Mbps user is sending data to a 10 Mbps user, the

10 Mbps utilization will be high.)

100 Mbps Green Blinking Indicates the amount of data traffic on the 100 Mbps

segment.

10M or 100M

Link/Receive

(built into each

vista RJ-45

network port)

Green On A link is successfully established between the hub and the

PC.

Off No data link is established and/or the cable is not connected,

is defective, or is the wrong type.

Blinking There is incoming data on the port.

8152FA

100M 10M

vista RJ-45

network ports

Rear Panel of the Model DS108 Hub

Ground clip Power

receptacle

8226FA

5 Vdc 800 mA

Model DS108 Dual Speed Hub Installation Giude

Before you begin installing the hub, prepare the installation site. Make sure the site meets the

operating environment requirements of the equipment.

Install the Hub on a Flat Surface

If installing the hub on a flat surface such as a tabletop, make sure the bottom of the chassis is

clean and dry.

To install the hub on a flat surface:

1. Set the hub on a table or shelf so that it has at least 2 inches

(5 cm) of space on all sides.

2. Connect the power cord(s) first to the power entry receptacle on the hub rear panel and

then to the wall.

Install the Hub on a Wall

If installing the hub on a wall, make sure you have a Phillips screwdriver.

To install the hub on a wall:

1. Set the mounting screws and anchors (supplied with the wall mount hardware) in the

wall.

2. Using the slots on the bottom of the hub, hang the hub on the wall.

3. Connect the power cord(s) first to the power entry receptacle on the hub rear panel and

then to the wall.

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.

Humidity 90% maximum relative humidity, 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).

Wiring hardware Wiring hardware, such as punchdown blocks orpatch panels, complete before

installing the hub.

Installation Procedures

Prepare the Site

Install the Hub

Model DS108 Dual Speed Hub Installation Giude

Set Normal/Uplink Push Button

The Normal/Uplink push button on the front panel of the hub allows you to select the Uplink

(MDI) or Normal (MDI-X) position for port 8 on the Model DS108 hub. All other ports are wired

Normal for direct connection to PCs.

Select Normal if connecting a PC or server to the port. Select Uplink if connecting a router or

switch. The Normal/Uplink push button eliminates the need to use a crossover cable.

Caution: 100 Mbps operation requires the use of Category 5 UTP wiring with 100

Mbps certified connectors. NETGEAR highly recommends using Category 5 cable so

your network can operate at either 10 or 100 Mbps.

Normal/Uplink

Link RX

12345678

100 Mbps

10 Mbps

Col

Pow

8250FA

Connect a PC to the Hub

Model DS108 Dual Speed Hub Installation Giude

10 or 100 Mbps Transmission with the Hub

Two Model DS108 hubs can be daisy-chained together at 100 Mbps to support more than eight

PCs. For larger networks, use a 10/100 Mbps switch such as the NETGEAR Model FS104 switch.

The illustrations show both a two-hub daisy-chain configuration and a network that incorporates

the NETGEAR Model FS104 switch.

Connect Hubs at 10/100 Mbps

Model DS108 hub

Model FS104

10/100 Mb/s

switch

PCs

Switched network with Model DS108 hubs

Two Model DS108 hubs daisy chained

Server

8243FA

Model DS108 Dual Speed Hub Installation Giude

When installation is complete and power has been applied to the hub, the following conditions

should exist:

• Power LED is on.

• Link LED on each connected port is on.

• Utilization LEDs on the front panel are blinking when data is being received by any port in

the hub, and the Link/Receive LED on the connected port is blinking when data is being

received by that port.

If there are any problems, refer to the Troubleshooting table.

Twisted Pair Cables

For two devices to communicate, the transmitter of each device must be connected to the receiver

of the other device. The crossover function is usually implemented internally as part of the

circuitry in the device. Most hub and switch ports are MDI-X wired and called normal ports.

Computers and workstation adapter cards are usually MDI wired and called uplink ports.

An uplink port connects to a normal port using standard straight-through cable, and a normal port

connects to a normal port using a crossover cable.

The figures illustrate the use of straight-through and crossover twisted pair cables.

Verify the Installation

Cable and Connector Information

Straight-through

twisted pair cable

Crossover

twisted pair cable

8146EB

Uplink or

MDI port Normal or

MDI-X port

Normal or

MDI-X port Normal or

MDI-X port

6Tx

Model DS108 Dual Speed Hub Installation Giude

RJ-45 Connector

The RJ-45 connector (shown in the illustration with an RJ-45 plug) is used to connect

workstations, hubs, and switches through unshielded twisted pair cable. The RJ-45 connector

accepts four-pair Category 3 or Category 5 UTP cable.

RJ-45 Connector Pin

Assignment Normal Assignment

on Ports 1 to 8 Uplink Assignment

on Port 8

1 Input Receive Data + Output Transmit Data +

2 Input Receive Data - Output Transmit Data -

3 Output Transmit Data + Input Receive Data +

6 Output Transmit Data - Input Receive Data -

4, 5, 7, 8 Not used Not used

Symptom Cause Solution

Link LED off

or intermittent Port connection

not functioning Make sure the power cord is properly connected and

functioning.

Check the crimp on the RJ-45 connectors and make sure that

the plug is properly inserted and locked into the port at both

the hub and the device. Make sure cabling is Category 5 and

meets the requirements for 100 Mbps operation.

Check installation of the network interface cards and verify

that they are 100 Mbps capable. Be sure that the proper

software driver is loaded. Check link LEDs on the network

adapter card and PC or workstation. Make sure cables and

connectors are correct.

Collision LED

on or blinking Collisions taking

place on network

segment(s)

Excessive collisions can be caused by incorrect cabling,

connectors, or wiring techniques or can occur when the

network is too busy. Ensure that the PC at the far end is set to

half-duplex mode and is operating properly.

Problems with

port 8 Normal/Uplink

push button in the

wrong position

Check the Normal/Uplink push button on the front panel.

711EA

12345678

Troubleshooting Information

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