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
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100 Mbps
10 Mbps
Col
Pow
Model DS108 hub
Power
adapter

Model DS108 Dual Speed Hub Installation Giude
Normal/Uplink
On - Link Blinking = Receive
12
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
12
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
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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 DS108 hub
Model DS108 hub
Model FS104
10/100 Mb/s
switch
PCs
PCs
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
Tx
Uplink or
MDI port Normal or MDI-X port
Normal or
MDI-X port Normal or MDI-X port
Rx
1
2
3
6Tx
Rx
1
2
3
6
1
2
3
6
1
2
3
6
Tx
Rx
Tx
Rx

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.
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18
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Troubleshooting Information