Accton Technology EtherHub-16 User manual

EtherHub-16 Quick Start Guide

Smart Ethernet Hub with 16 RJ-45 Ports and 2 AUI/BNC Ports

This 10 Mbps Ethernet hub includes 16 RJ-45 ports on the front panel, and 2 AUI/BNC ports on

the rear panel. This hub can be operated in a stand-alone configuration, cascaded to other hubs,

or linked to one or more AUI/BNC backbones. This hub is suitable for desktop or rack-mount

installation, and supports full-range power input. The EtherHub-16 conforms to the IEEE 802.3

standard for local area networks based on CSMA/CD, and provides10BASE-T, 10BASE2 and

10BASE5 repeater functions including:

• Signal amplification and retiming

• Preamble regeneration and fragment extension

• Automatic port partition and reconnection

Hardware Installation

The EtherHub-16 has 16 RJ-45 ports, of which Port 16 can serve as either a standard port or a

daisy-chain port. It also has two AUI/BNC ports. Use twisted-pair cable (100W STP or UTP) to

connect any standard RJ-45 (MDI-X) port to a server/workstation, or to connect the RJ-45 daisy-

chain port (i.e., Port 16MDI ) to another compatible hub or switch. You can also attach up to two

Ethernet LAN backbones by connecting thin coaxial cable to a BNC port or connecting thick

coaxial cable to an AUI port.

Making RJ-45 Connections

1. Prepare straight-through twisted-pair cable (100W) with RJ-45 plugs at both ends. The

length of each cable should not exceed 100 meters (328 feet).

IDo not plug a phone jack connector into any RJ-45 port. This may damage the hub. Instead,

use only twisted-pair cables with RJ-45 connectors that conform with FCC standards.

EtherHub-16 Quick Start Guide

2. If you are making a connection to an end-node device (e.g., a PC or server), be sure that it has

a properly installed 10BASE-T network interface card. Attach one end of a straight-through

twisted-pair cable to an standard port (Port 1 ~ 16MDI-X) on the hub and the other end to the

RJ-45 port of the device’s network interface card. When inserting an RJ-45 plug, be sure the

tab on the plug clicks into position, to ensure that it is properly seated. Using the hub in a

stand-alone configuration, you can network up to 16 workstations.

3. Port 16MDI can be connected to a networking device such as a another compatible hub or a

switch. Run straight-through cable from Port 16MDI on this hub to a standard (MDI-X) port

on the other device. (When attaching the hub to a bridge or router, verify the port type

implemented on these devices before connecting any cabling.)

Note: If necessary, you may also cascade from the MDI port on another device to the MDI-X on

this hub. Limit the number of hubs cascaded together is four, and be sure you do not create

any loops in your network connections.

Connecting to an Ethernet Backbone

Thin Ethernet - Plug the BNC T-type connector into a BNC port on the hub, and use this port to

connect the hub to a 10BASE2 thin Ethernet trunk. If the unit is at the terminal end of a trunk

segment, then connect a 50-ohm (Ω) terminator to the open end of the “T” connector. If the BNC

port has no connection, plug in the T-type connector and lock both ends with a 50 Ωterminator.

Thick Ethernet - Attach an AUI to 10BASE5 transceiver to the thick Ethernet trunk, and then run

an AUI drop cable (with 15-pin D-type connectors on both ends) between an AUI port of the hub

and the transceiver. Note that the maximum length of an AUI drop cable is 50 meters (164 feet).

Fiber Optic - If you plan to use an AUI port for connecting fiber optic cable, attach a fiber optic

transceiver (MAU) to an AUI port, and then connect the transceiver to the fiber optic backbone.

To specify the port types used on the rear panel, position the switches as indicated below:

Port 2 Port 1 Switch

BNC BNC ON 2 3 41

FAlso note that if your transceiver provides an SQE

(Signal Quality Error) test, then it must be disabled.

BNC AUI

1 2 3 4

AUI BNC ON 1 2 3 4

AUI AUI ON 1 2 3 4

EtherHub-16 Quick Start Guide

Providing Power to the Hub

1. Power on the hub by plugging the power cord into the power socket at the rear of the hub,

and the other end into a power outlet.

2. Check the LED marked Power on the front panel to see if it is on. The unit automatically

selects a setting that matches the connected input voltage. Therefore, no additional adjustments

are necessary when connecting to any input voltage in the range marked on the rear panel.

System Configuration

The EtherHub-16 provides standard RJ-45 ports for attaching end-node devices such as a

workstation or server, a daisy-chain port for cascading to another hub or switch, BNC ports for

attaching a thin Ethernet backbone, and an AUI port for attaching a thick Ethernet backbone or a

fiber optic link (via the appropriate transceiver). The following figure illustrates some of the

possible network configurations and cabling restrictions that apply to this hub.

EtherHub-16 Quick Start Guide

Hardware Description

RJ-45 Ports

This hub has 16 RJ-45 ports that can be used to connect end-node devices (e.g., workstations, file

servers, or printers). Be sure you have an Ethernet network interface card installed in the device

to be connected to the hub. Then connect it to any available standard RJ-45 port on the hub (i.e.,

Ports 1~16MDI-X) using straight-through twisted-pair (UTP or STP) cable.

Note: When Port 16MDI-X is used, Port 16MDI cannot be used.

Daisy-Chain Port

A compatible hub or other network interconnection device (e.g., an Ethernet switch) can be

attached to the daisy-chain port (Port 16MDI). Use straight-through twisted-pair (STP or UTP)

cable to connect to a standard MDI-X port on the target device. Up to 4 hubs can be cascaded in

this manner. To connect to another hub, you may also run twisted-pair cabling from an MDI-X

port on this hub to an MDI daisy-chain port on another hub. However, if you must connect to

another hub via standard MDI-X ports at both ends of the cable, use crossover cabling.

Note: When Port 16MDI is used, Port 16MDI-X cannot be used.

BNC Port (10BASE2)

This hub has two built-in BNC transceivers (i.e., BNC1 and BNC2) on the rear panel for

connection using thin coaxial cable. To use either BNC port, set the DIP switches to the correct

positions and described on page 2. A BNC port can be connected to a thin coaxial cable segment

containing up to 30 nodes. The thin coaxial cable that links the BNC ports may be extended up

to 185 meters and have computers or other Ethernet devices attached to it. When connecting two

hubs via BNC ports, there should be at least 0.5 meters (1.64 feet) of coaxial cable between the

two BNC ports. If the hub is at the end of an Ethernet cable, plug and lock the 50-ohm (Ω)

terminators to the T-type connector on the BNC port.

FClose off an open end of any T-type connector that is plugged into a BNC port with a 50-Ω

terminator. In particular, when a hub using the BNC port connection is at the end of an

Ethernet segment, close off the open end of the T-type connector with a 50Ωterminator.

Also, if the BNC port is not used, plug a T-type connector into it and close off both ends with

a 50Ωterminator.

EtherHub-16 Quick Start Guide

AUI Port

This hub has two built-in AUI transceivers (i.e., AUI1 and AUI2) on the rear panel for connection

using thick Ethernet cable (10BASE5) or fiber optic Ethernet cable (10BASE-F). To use either

AUI port, set the DIP switches to the correct positions and described on page 2. An AUI port can

be connected to thick Ethernet by running an AUI drop cable from the hub to a 10BASE5

transceiver attached to the trunk line. A thick Ethernet segment can be extended up to 300 meters

(1270 feet) and contain up to 500 nodes. For fiber optic connection, attach a transceiver directly

to the AUI port, and run a point-to-point link up to 2 kilometers (1.24 miles).

Front Panel Indicators

This hub provides LED indicators for monitoring various network conditions. A glance at the

front panel allows you to instantly monitor the status of each station port plus the overall

condition of the hub.

LED Status Indication

Jabber Steady Packets have exceeded the length threshold for Jabber Lockup Protection on the hub.

Power Steady Power is being supplied to the hub.

Collision Flashing Two or more devices are transmitting at the same time. This is normal for an Ethernet

network. However, if there are excessive collisions, the network may be overloaded.

Link/Rx Steady Port is connected to an active node and receiving a valid Link Integrity pulse.

Flashing Traffic is being received at this port.

Partition Steady Port is partitioned off due to faulty cable or connectors, or excessive packet collisions.

Troubleshooting

Symptom: Link/RX indicator remains unlit.

Causes: Workstation’s network adapter, cable or hub port is defective.

Solution: The most common cause is a defective network adapter or cable connection. Check

the corresponding cable connections, or the workstation’s network adapter for

possible defects. Verify that the correct cable type (straight or crossover) is being

used. (Note that crossover cable is only required if you cascade hubs via standard

MDI-X ports; i.e., Port 16MDI is not used.) Replace the defective cable or adapter.

Symptom: Partition indicator lights up.

Causes: Hub has partitioned RJ-45 port due to excessive packet collsions.

Solution: If port partitioning has occurred, it will be automatically re-enabled when the

problem is corrected or the port receives a valid data packet.

EtherHub-16 Quick Start Guide

Symptom: Jabber indicator lights up.

Causes: Frame received on this port exceeds length threshold for Jabber Lockup Protection.

Solution: If jabber lockup has occurred, it will be automatically re-enabled when the problem

is corrected or the port receives a valid data packet. Check for a faulty network

interface card that has started transmitting data but never stops.

Symptom: Power indicator does not light up after power on.

Causes: Defective power supply or attached cable, or a problem at the power source.

Solution: Check the power source and attached cable. If the problem cannot be resolved, you

may have to replace your unit’s power supply. Ask for dealer assistance.

Specifications

Transmission Technique : Baseband

Topology : Tree, Star, Bus (BNC)

Access Method : CSMA/CD, 10 Mbps

Standard Conformance : IEEE 802.3 10BASE-T

Media Supported : Category 3,4,5 twisted-pair cable

Interfaces : 16 standard MDI-X RJ-45 ports, 1 MDI RJ-45 daisy-chain port,

2 AUI ports, 2 BNC ports

Hub-to-Workstation Distance : 100m max.

DimensionsDimensions : 442mm x 141mm x 50mm (17.4" x 5.55" x 1.97")

Power Input : 100-240 (



10%) VAC

Power Consumption : 1 Amp max.

Temperature : 0°C to 80°C (Standard Operating)

Humidity : 90% (Noncondensing)

Certification :

Emissions : FCC Class A

Safety : UL, CSA, TÜV/GS

EtherHub-16 Quick Start Guide

EMI Warning

FCC Class A Certification

This device complies with Part 15 of the FCC Rules. Operation is subject to the following

conditions:

1. This device may not cause harmful interference, and

2. This device must accept any interference received,including interference that may cause

undesired operation.

Warning: This equipment generates, uses, and can radiate radio frequency energy and,

if not installed and used in accordance with the instruction manual, may cause

interference to radio communications. It has been tested and found to comply with the

limits for a Class A computing device pursuant to Subpart B of Part 15 of FCC Rules,

which are designed to provide reasonable protection against such interference when

operated in a commercial environment. Operation of this equipment in a residential area

is likely to cause interference, in which case the user, at his own expense, will be

required to take whatever measures are required to correct the interference.

You may use unshielded or shielded twisted-pair (100ΩSTP or UTP) for RJ-45 connections.

Warnings 1. Wear an anti-static wrist strap or take other suitable measures to prevent

electrostatic discharge whenever handling this equipment.

2. When connecting this hub to a power outlet, connect the field ground lead on the tri-

pole power plug to a valid earth ground line to prevent electrical hazards.

3. The connectors are not for telephone system use.

Les raccordeurs ne sont pas utilisé pour le système téléphonique!

Note: In order to maintain compliance with the limits of a Class B digital device,

Accton requires that you use a quality interface cable when connecting to this

device. Changes or modifications not expressly approved by Accton could

void the user’s authority to operate this equipment. Suggested cable type is:

Twisted-pair for RJ-45 connections: 10BASE-T

This Ethernet (50 ohm) for BNC connections: 10BASE2

Thick Ethernet (D-type) for AUI connections: 10BASE5 or 10BASE-F

EtherHub-16 Quick Start Guide

You may find the following book prepared by the Federal Communication Commision helpful:

The Interference Handbook

This booklet is available from the U.S. Government Printing Office. Washington, D.C. 20402.

Stock No. 004-000-00345-4.

Safety Compliance

Underwriters Laboratories Compliance Statement

Important!Before making connections, make sure you have the correct Cord Set. Check it (read

the label on the cable) against the following specification list.

Operating

Voltage Cord Set Specifications

120 Volts UL Listed/CSA Certified Cord Set

Minimum 18 AWG

Type SVT or SJT three conductor cord

Maximum length of 15 feet

Parallel blade, grounding type attachment plug rated 15A, 125V

240 Volts (For UL Listed/CSA Certified Cord Set

North America) Minimum 18 AWG

Type SVT or SJT three conductor cord

Maximum length of 15 feet

Tandem blade, grounding type attachment plug rated 15A, 125V

240 Volts (For CordSetwithH05VV-Fcord havingthreeconductorswithminimumdiameterof0.75mm2

Europe only) IEC-320 receptacle

Male plug rated 6A, 250V

The unit automatically matches the connected input voltage. Therefore, no additional adjustments

are necessary when connecting it to any input voltage within the range marked on the rear panel.

Do not plug a phone jack connector into any of the RJ-45 ports.

This may damage the hub.

Les raccordeurs ne sont pas utilisé pour le système téléphonique!

EtherHub-16 Quick Start Guide

Sicherheitshinweise

1. Die Steckdose muß sich in der Nähe des Gerätes befinden und leicht zugänglich sein.

2. Zum Reinigen den Stecker aus der Steckdose ziehen. Beim Reinigen keine Flüssigreiniger

oder Sprays verwenden, sondern ein angefeuchtetes Tuch.

3. Das Ethernet hub gerät nicht in Naßräume oder in der Nähe von Wasser benutzen, wie z.B.

Badezimmer, Schwimmbad, Spülbecken usw. . Das Eindringen von Wasser kann zur

Zerstörung des Gerätes führen.

4. Das Ethernet hub gerät nicht auf einer unstabilen Unterlage, wie z.B. Rollwagen, Gestell

usw., aufstellen. Es könnte herunterfallen und Verletzungen oder Beschädigungen von

Mensch und Gerät verursachen.

5. Die Belüftungsöffnungen nicht blockieren oder auf falscher Ober-fläche, wie Bett, Sofa usw.,

stellen. Durch die Blockierung kann es zur Zersörung des Gerätes durch Überhitzung

kommen.

6. Versuchen Sie niemals dieses Gerät selbst zu warten, da beim Öffnen oder Abnehmen des

Gehäuses die Gefahr eines elektrischen Schlages besteht.

7. Keine Gegenstände auf das Anschlußkabel stellen, damit es nicht durch scharfe Kanten

zerstört werden kann.

8. Keinerlei Gegenstände durch die Öffungen in das Gerät stecken, da es dadurch sonst zu

Kurzschlüssen kommen kann.

9. Bei Störungen des Gerätes den Wartungsdienst verständigen.

10. Bei Reperaturen dürfen nur Orginalersatzteile oder Bauteile mit gleichen Eigenschaften

verwendet werden. Andere Bauteile können Feuer, elektrischen Schlag oder andere Gefahren

verursachen.

11. Nach Beendigung von Wartungsarbeiten oder Reperaturen durch den Kundendienst sollte die

Sicherheitsprüfung durchgeführt werden.

12. Bei längerem Stillstand des Gerätes, ist diese von der Versorgungs- spannung zu trennen.

Dies verhindert eine Beschädigung des Gerätes durch eine Überspannung in der Zuleitung.

13. Der arbeitsplatzbezogene Lärmschutzpegel nach DIN 45 635 ist kleiner 70dB (A).

EtherHub-16 Quick Start Guide

Warranty

Accton warrants to the original owner that the product delivered in this package will be free from defects in

material and workmanship for the lifetime of the product. For the warranty to apply, you must register your

purchase by returning the registration card indicating the date of purchase and including proof of purchase.

There will be a minimal charge to replace consumable components, such as fuses, power transformers, and

mechanical cooling devices. The warranty does not cover the product if it is damaged in the process of being

installed. Accton recommends that you have the company from whom you purchased this product install it.

THE ABOVE WARRANTY IS IN LIEU OF ANY OTHER WARRANTY, WHETHER EXPRESS, IMPLIED OR

STATUTORY, INCLUDING BUT NOT LIMITED TO ANY WARRANTY OF MERCHANTABILITY, FITNESS FOR A

PARTICULAR PURPOSE, OR ANY WARRANTY ARISING OUT OF ANY PROPOSAL, SPECIFICATION OR

SAMPLE. ACCTON SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES. ACCTON

NEITHER ASSUMES NOR AUTHORIZES ANY PERSON TO ASSUME FOR IT ANY OTHER LIABILITY.

to change without notice. All trademarks or brand names are properties of their respective companies.

Disclaimer

The publisher assumes no responsibility for errors that may appear in this document, nor does it make any

commitment to update information it contains.

All brand and product names mentioned are trademarks or registered trademarks of their respective

companies.

For warranty information:

All territories except North and South America:

Accton Technology Corporation, International Headquarters

No. 1, Creation Rd. III, Science-based Industrial Park, Hsinchu 300, Taiwan, R.O.C.

Phone: 886-3-5770-270 Fax: 886-3-5770-267 BBS: 886-3-5770-654

North and South America:

Accton Technology Corporation, USA Headquarters

1962 Zanker Road, San Jose, CA 95112, U.S.A.

Phone: 408-452-8900 Fax: 408-452-8988 BBS: 408-452-8828

EH2016

E1296-R01

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