LevelOne FHU-0803TXD Manuel utilisateur

FHU-0803TXD

8 Port 10/100Mbps

Dual Speed Ethernet Hub

with Bridge

This quick start guide contains the information necessary to install

and operate the FHU-0803TXD 8 port 10BASE-T/100BASE-TX

dual speed Ethernet Hub.

Introduction

TheFHU-0803TXD provides 8 RJ-45 ports for both 10 Mbps or

100 Mbps Ethernet connections, which are detected by auto-

sensing. The dual-speed hub contains two internal repeater buses,

one for 10 Mbps traffic and another for 100 Mbps traffic. Traffic

passing between attached devices that operate at the same speed is

confined within the appropriate repeater bus.

In the FHU-0803TXD, an internal Ethernet switch consisting of a

10 Mbps and a 100 Mbps switching port, is used to link the

repeater buses. Only if traffic has to be passed between a 10 Mbps

and a 100 Mbps device, the data will be forwarded to the other

internal repeater bus if the destination address is not found in the

address table, or broadcast traffic is sent.

Thedual-speed hub provides an ideal bridge between 10M and 100

Mbps Ethernet networks. Moreover, the smart design built into the

display panel provides a friendly interface that simplifies

installation and network troubleshooting.

Package Contents

Your package includes the following:

lFHU-0803TXD

lUser’s Manual

Hardware Description

TheFHU-0803TXD hubs provide 8 10/100 Mbps dual-speed

ports. Each of these ports automatically senses the speed of the

attached device, and channels the data tothe appropriate backplane,

which is the 10 or 100 Mbps repeater bus.

TheFHU-0803TXD contains a 2-port switch to connect these two

repeater buses. The learning function of the internal switch of

FHU-0803TXD stores the node address and the corresponding

repeater bus of each incoming packet in a routing table. This

information is subsequently used to confine traffic exchanged

between legacy Ethernet devices within the slower repeater bus,

leaving the other bus free to handle Fast Ethernet traffic. By

confining traffic to its respective collision domain, the overall load

on the network is significantly reduced.

The figures below show the components of FHU-0803TXD.

LED Indicators

This hub provides LED indicators for monitoring variousnetwork

conditions. A glance on the top panel will allow you to instantly

monitor the status of each station port plus the overall condition

affecting the hub.

LED Color Indication

Power (POWER) Green ON: Unit is receiving power

OFF: Power is disconnected, no

power received

Collision (COL) Orange ON: Collision happens.

OFF: No collision

Port Link/Partition

(LINK/PARTITION) Green/

Red Green: Indicates a valid link has

been established on this port

8 Port 10/100Mbps Dual Speed Hub

FHU-0803TXD

Red: Indicates port has been

partitioned due to an abnormal network

condition, or due to too many

collisions on the port

OFF: No valid link has been

established on this port

Port 10/100Mbps

(10/100Mbps) Green ON: Port is in 100 Mbps connection

OFF: Port is in 10 Mbps connection

Switch Position

There is a switch MDI-X/MDI on the front side. Make sure the

switch is in the correct position.

Switch Position Indication

MDI-X/ MDI left (MDI-X)

right (MDI)

The port 8 acts as normal station port

The port 8 acts as Daisy-chain port

One more switch on the left side for GDH08BM

10/100M

vs.10M up (10/100M) The port 8 acts as normal port

down (10M) The port 8 acts as 10 Mbps port

Hardware Installation

The hub can be placed directly on your desktop or wall-mounted.

Before you start installing the hub, make sure you can provide the

right operating environment, including power requirements,

sufficient physical space, and proximity to other network devices

that are to be connected. Verify the following installation

requirements:

•Power requirements: 100-120 VAC (±10%) at 50 to 60 Hz (±

3Hz) or 220-240 VAC (±10%) at 50 to 60 Hz (±3Hz).

•The hub should be located in a cool dry place, with at least 10

cm. (4 in.) of space at the front and back for ventilation.

•Place the hub out of direct sunlight, and away from heat sources

or areas with a high amount of electromagnetic interference.

The hub has 8 RJ-45 station ports, one of which also serves as an

MDI daisy-chain port.

1. Select an appropriate location.

2. Connect yourworkstation to any available RJ-45 port on the

hub using an unshielded or shielded twisted-pair cable. Make

sure the switch MDI-X/MDI to the left position

IDo not plug a phone jack connector into any RJ-45 port. This

may damage the hub. Use only twisted-pair cables with RJ-45

connectors that conform with FCC standards.

Notes: 1. Make sure each twisted-pair cable does not exceed 100 meters

(328feet).

2. The Category 5 cables are used for all Fast Ethernet

connections. We advise using Category 5 cable for dual-

speed hub to avoid any confusion or inconvenience in

the future when you upgrade attached devices to Fast

Ethernet.

3. When a hub is to be connected to another switch in a daisy-

chain configuration, set the port 8 as daisy-chain port (Switch

MDI-X/MDI to right position). Use normal RJ45 cable. Plug

one end of the cable into port 8 of the hub and plug the other

end of the cable into any port of the other switch.

Note: When switch MDI-X/MDI set to MDI, the port 8 of the unit

cannot be used as a station port.

4. When external switch device is adopted to interconnect other

segments, the switch on the left side panel of FHU-0803TXD

can set the port 8 as 10Mbps port in case both interconnected

ports are auto-negotiated.

5. Plug the power cord into the corresponding socket.

Then connect it to an electrical outlet to power on the

hub.

Troubleshooting

The hub can be easily monitored through panel indicators to assist

the network manager in identifying problems. This section

describes common problems you may encounter and possible

solutions.

Symptom: Power indicator does not light up (green) after power

on.

Cause: Defective power outlet, power cord, or internal power

supply.

Solution: Check the power outlet by plugging in another device

that is functioning properly. Check the power cord

with another device. If these measures fail to resolve

the problem, call for dealer assistance.

Symptom: Link indicator does not light up after making a

connection.

Cause: Network interface, network cable, or hub port is

defective.

Solution: Verify that the hub and attached device are powered on.

Be sure the cable is plugged into both the hub and

corresponding device. Verify that the proper cable type

is used and its length does not exceed specified limits.

Check the adapter on the attached device and cable

connections for possible defects. Replace the defective

adapter or cable if necessary.

Network Specification

Hub-to-workstation

connection : 100 meters maximum cable

length for unshielded twisted-pair

(UTP) category 5 cable or

STP cable.

Number of hubs chained :2 max for 100BASE-TX.

Number of hubs chained :4 max for 10BASE-T

Specifications

Base Criteria

Transmission Technique : Base band

Topology : Tree

Access Method : CSMA/CD, 100Mbps

Standards Conformance : IEEE 802.3u 100BASE-TX

IEEE802.310BASE-T

Media Supported : Unshielded twisted-pair, shielded

twisted-pair

Interfaces : 8 RJ-45 station ports, 1 RJ-45

daisy-chain (MDI) port

Hub-to-Workstation

Distance : 100 meters maximum using

category 5 UTP or STP cable

Indicator Panel : LEDs for Power(G), Collision(O),

and per-port Link(G)/Partition(R)

More 100M(G).

Power Consumption : 15 Watts max.

Dimensions : 254mm W x 67mm D x 33mm H

Power System : 100-120 VAC, or 220-240 VAC

Temperature : 0?to 40?(Standard Operating)

Humidity : 10% to 90% (Non-condensing)

Certification : FCC Class A, VCCI Class A,

CISPR 22 Class A

Safety :CSA/NRTL, TÜV/GS

Switching Criteria

Network Bridging Function :filtering, forwarding and learning

Switching Method : store-and-forward

Address Table : 1K entries

Queue Buffer : 120KB Buffer per port

Filtering/Forwarding Rate : line speed

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