Fast EtherHub-12s &INO
Installation Manual Fast EtherHub-12s Smart Fast Ethernet Hub with 12 100BASE-TX Ports
Copyright (c) 1997 by Accton Technology Corporation. All rights reserved. No part of this document may be copied or reproduced in any form or by any means without the prior written consent of Accton Technology Corporation. Accton makes no warranties with respect to this documentation and disclaims any implied warranties of merchantability, quality, or fitness for any particular purpose. The information in this document is subject to change without notice.
Package Contents Carefully unpack the contents of the package and verify them against the checklist given below. Package Checklist æ æ æ æ æ Fast EtherHub-12s (Model No. EH3012-TX) AC power cord (optional) Four rubber foot pads Installation manual Warranty registration card Please inform your dealer immediately should there be any wrong, missing, or damaged parts. If possible, retain the carton, including the original packing materials.
Quick Installation The Fast EtherHub-12s is a Class II repeater. It contains 12 100BASE-TX Fast Ethernet ports. The smart design built into the front display panel provides a friendly interface that simplifies installation and network troubleshooting. If you are already familiar with basic network operations, you should be able to install this hub as described below: 1. Unpack the Fast EtherHub-12s. 2.
Fast EtherHub-12s User’s Guide first calculate the maximum length permitted between each pair of end nodes as described in Chapter 2 under the section on Precise Cable Length Budgeting. 5.
About this Guide This guide is designed for the experienced network installer. It describes how to install and operate Accton’s Fast EtherHub-12s. After reading this manual, you should be able to use the front display panel and configure options to manage all your network connections. This manual covers the following topics: Chapter 1 - Product Overview Brief description of Fast Ethernet, followed by a description of this hub and a summary of its important features and specifications.
Contents Chapter 1: Product Overview ................................................. 1-1 Introduction to Fast Ethernet .....................................................................................1-1 Accton’s Fast EtherHub-12s......................................................................................1-1 Basic Features ...........................................................................................................1-2 Chapter 2: Installing the System...........................
Fast EtherHub-12s User’s Guide Appendix A: Troubleshooting................................................ A-1 Diagnosing Hub Indicators........................................................................................A-1 System Diagnostics ...................................................................................................A-2 Power and Cooling Problems ...............................................................................A-2 Installation ......................................
Fast EtherHub-12s User’s Guide Limited Warranty .......................................................................................................E-4 Customer Remedies..............................................................................................E-4 Return Process......................................................................................................E-5 Accton Offices...........................................................................................................
Chapter 1: Product Overview Introduction to Fast Ethernet Standard 10 Mbps Ethernet has served well for past generations of 286 and 386 machines performing simple file transfers. However, with the inevitable growth in corporate network size and the introduction of fully-functional 32-bit PC architectures, and operating systems running complex applications, 10 Mbps Ethernet has become a serious bottleneck.
Fast EtherHub-12s User’s Guide Basic Features • Transmits data at 100 Mbps for demanding applications • Conforms to the IEEE 802.
Fast EtherHub-12s User’s Guide • With automatic partitioning and reconnection, any port is automatically isolated if excessive collisions occur on it. When the condition is corrected, the port is automatically reconnected. • With the jabber lock-up function, the hub automatically stops transmission of abnormal Ethernet frames that may cause data loss for all network users. (Jabber refers to abnormal Ethernet frames which are much too long and may come from a malfunctioning Ethernet card.
Chapter 2: Installing the System This chapter provides information on installing the Fast EtherHub-12s, establishing network connections, and configuring the system. You may install this hub on any level surface (e.g., a table or shelf) or in a standard EIA equipment rack. However, please take note of the following minimum site requirements before you begin.
Fast EtherHub-12s User’s Guide Connecting the Hub System This hub is a Fast Ethernet repeater for 100BASE-TX networks. The EtherHub-12s has 12 RJ-45 station ports, of which Port 12 can serve as either a station port or a daisy-chain port (depending on the port’s switch setting). The station ports allow you to make connections to devices such as a workstation, server or router. You can also cascade to another compatible hub or switch by connecting an MDI port on one device (e.g.
Fast EtherHub-12s User’s Guide Making a Connection via the MDI Daisy-Chain Port 1. To make a direct connection to another compatible repeater or switch, use the 12MDI daisy-chain port. When connecting to this port, remember to set the port selection switch MDI. 2. Prepare straight-through shielded or unshielded twisted-pair cables with RJ-45 plugs at both ends. Use 100W Category 5 cable for all connections.
Fast EtherHub-12s User’s Guide Simplified Cable Length Constraints The Fast EtherHub-12s is a Class II repeater. IEEE recommends that Class II hubs be limited to a cascade of two hubs. The simplest rule is that workstation connections be limited to 100 meters for twisted-pair cabling, and that interhub cabling be limited to 5 meters. If you are stacking hubs in a wiring closet, this is good advise. When a hub is located in central wiring closet, connections to end users tend to be very long.
Fast EtherHub-12s User’s Guide connected hub when using twisted-pair cabling. However, when linking one or more Fast Ethernet repeaters together (i.e., in the same collision domain), the overall length of cable used between any two nodes should not exceed the limits outlined in the IEEE 802.3u standard.
Fast EtherHub-12s User’s Guide Verifying Port Status Check each connection by viewing the port status indicators listed below. (For a more detailed description of these indicators, refer to Chapter 4.) Indicates that the port has established a valid network connection. Traffic Indicates traffic traversing the port. Partition Indicates that the port has been isolated from the hub due to excessive errors.
Fast EtherHub-12s User’s Guide • Test the adapter for an attached workstation by trying it in another computer that has been successfully connected to the network. If you still can’t resolve the problem, please refer to Troubleshooting in Appendix A.
Chapter 3: Configuring the Network The Fast EtherHub-12s allows great flexibility in configuring your network. You can use it in a stand-alone or multiple hub configuration. Some of the common applications for this Fast EtherHub are described in this chapter. Stand-Alone This hub can be used in a simple stand-alone configuration as illustrated below. In compliance with IEEE 802.3u standards, the maximum cable distance between the hub and any workstation is 100 meters for twisted-pair cable.
Fast EtherHub-12s User’s Guide Using the RJ-45 Daisy-Chain Port You can easily connect to another hub via the MDI daisy-chain port (Port 12). When using Simplied Cable Length Constraints as described in Chapter 2, the interhub cable length is 5 meters. Figure 3-2 shows a sample configuration.
Fast EtherHub-12s User’s Guide Precise Guidelines for Configuring Multiple Hubs A detailed formula for calculating maximum cable length was provided in the section on Precise Cable Length Budgeting in Chapter 2. This formula stated that the maximum length of cabling that can be run from end-node to end-node is: 367m ≥ S(repeater equivalent length) + S(length of CAT-5 twisted-pair cable) For the daisy chain of three hubs shown in Figure 3-3, communications must be supported for node pairs AB and AC.
Fast EtherHub-12s User’s Guide Figure 3-3 Cabling Limits for Multiple Hub Configuration Notes: 1. The maximum length for each cable must be determined by calculations for the longest path (i.e., node-to-node connection) that passes through that segment. 2. To control the number of hubs in a path, we recommend that one hub be used to connect to several other hubs. Make sure there is only one path between any two stations on the network. 3.
Chapter 4: Hardware Reference Before connecting any network device to this hub, please review Chapter 2 for information on system installation and Chapter 3 for a brief look at common network architectures. This chapter describes the hardware features of the Fast EtherHub-12s. For easier management and control of the hub, familiarize yourself with the display indicators and ports. Front Panel There are 12 RJ-45 MDI-X station ports and 1 RJ-45 MDI daisy-chain port on the front panel.
Fast EtherHub-12s User’s Guide The front panel array provides indicators that show the utilization of network bandwidth and indicate the status of port connections. It includes port status indicators and a statistical display for network traffic as shown below. Figure 4.2 Indicators Fan Alert Color: Label: Function: Condition ON OFF Red Alert Fan status Indication The unit’s fan has failed. (Call for service) The unit’s fan is functioning properly.
Fast EtherHub-12s User’s Guide Statistical Display for System Performance Utilization - (Utilization%) The statistical indicators show the percentage of valid data passing through all ports compared to overall network bandwidth (updated every 0.5 seconds). There are 5 LEDs representing the percentage of network utilization. The corresponding LEDs light up to show that the utilization of LAN bandwidth has reached this level. When active, these LEDs behave like a stereo’s equalizer display.
Fast EtherHub-12s User’s Guide Note: If the hub displays a high collision rate, check to see if any of the connected devices are malfunctioning or if a loop has been formed in your network connections. Otherwise, you may need to reconfigure your network to balance the traffic load.
Fast EtherHub-12s User’s Guide Troubleshooting: If the Link LED does not light up when a device is connected to its corresponding port, check that both the hub and connected device are powered on. Be sure the cable length for all devices connected to the hub are within the limits described under Distance Limit for Fast Ethernet Cabling in Chapter 2. As a general rule, be sure that none of your twisted-pair cables exceed 100 meters.
Fast EtherHub-12s User’s Guide Rear Panel The rear panel on the hub includes a full-range power socket. Figure 4.3 Rear Panel Power Socket The power socket accepts AC power from 100 to 240V at 50 to 60Hz. The unit is equipped with a universal full-range power source.
Appendix A: Troubleshooting Diagnosing Hub Indicators This Fast EtherHub can be easily monitored through its comprehensive panel indicators. These indicators assist the network manager in identifying problems the hub may encounter. This section describes common problems you may encounter and possible solutions. Symptom: Power indicator does not light up. Cause: Defective power outlet, power cord, or internal power supply. Solution: Have your unit’s power supply or Power LED replaced.
Fast EtherHub-12s User’s Guide System Diagnostics Power and Cooling Problems If the Power indicator does not turn on when the power cord is plugged in, you may have a problem with the power outlet, power cord, or internal power supply as explained in the previous section. However, if the unit powers off after running for a while, check for loose power connections, power losses or surges at the power outlet, and verify that the fan on back of the unit is unobstructed and running prior to shutdown.
Fast EtherHub-12s User’s Guide External Adapters Make sure the network interface hardware and software drivers for the attached devices are function properly. Check the adapter cards and associated drivers used in any attached workstation or server. Physical Configuration If problems occur after altering the network configuration, restore the original connections, then try to track the problem down by implementing the new changes, one step at a time.
Appendix B: Port and Cable Assignments RJ-45 Port Figure B-1 RJ-45 Connector (on the Hub Side) Pin 1 2 3 6 4,5,7,8 MDI-X Assignment (Station Port 1 ~ 12) Input Receive Data + Input Receive Data Output Transmit Data + Output Transmit Data Not Used MDI Assignment (Cascade Port 12) Output Transmit Data + Output Transmit Data Input Receive Data + Input Receive Data Not Used Table B-1 RJ-45 Pin Assignments Schematics for both straight and crossover twisted-pair cable are shown below.
Appendix C: Product Specifications Transmission Technique Topology Access Method Standards Conformance Media Supported Interfaces Hub-to-Workstation Distance Daisy-Chain Distance (2 hubs) Dimensions Power Input Power Consumption Temperature Humidity Certification Emissions Immunity Safety Baseband Star or Tree CSMA/CD, 100Mbps IEEE 802.
Appendix D: Regulatory Standards Compliance EMI Certification FCC Class B Certification Accton Technology Corporation Model Numbers: EH3012-TX FCC ID: HED3012EHLCT-TX 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.
Fast EtherHub-12s User’s Guide 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. You may find the following booklet prepared by the Federal Communications Commission helpful: The Interference Handbook This booklet is available from the U.S.
Fast EtherHub-12s User’s Guide Read the instructions for correct handling. European Community Immunity Requirements This unit was tested and found to comply with the Class B limits of EN55022 (CISPR 22) and the immunity requirements of EN50082-1. CE Mark Declaration of Conformance (for EMI and Safety) This is to certify that this product complies with ISO/IEC Guide 22 and EN45014.
Fast EtherHub-12s User’s Guide Safety Compliance Underwriters Laboratories Inc. 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.
Fast EtherHub-12s User’s 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 produkt 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.
Appendix E: Product Support Services Product Registration Fill in the Owner Registration Card and mail it to Accton Technology Corporation. Accton will keep your record and inform you of any new Accton unit developments. Problem Report If problems occur during unit operation, please check the adapter configuration settings, cables, connectors, network terminators, hardware compatibility and other network components.
Fast EtherHub-12s User’s Guide After repair, Accton will inform you of the date of delivery and the exact amount due. Please send the payment by T/T (Telegram Transfer), and Accton will send you the fixed component after receiving payment. With or without warranty, if the hardware is found to be free of defects, you will only be charged for testing and handling. Bulletin Board Service (BBS) • In countries other than the U.S., call 886-3-5770-654 to reach Accton Taiwan’s modem line.
Fast EtherHub-12s User’s Guide Technical Support Your dealer or installer is the person who understands your network and Accton units. If neither is available to help you, Accton technical support engineers are available by FAX, mail or phone. • Send your technical questions by FAX to: International Headquarters: 886-3-5770-267 USA Headquarters: 408-452-8988 • To obtain software upgrades connect via ftp to ftp.accton.com.tw • Send your technical questions by email to support@accton.com.
Fast EtherHub-12s User’s Guide Limited 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.
Fast EtherHub-12s User’s Guide Return Process Before you may return any Accton product to Accton, you must request an RMA number by calling, FAXing or writing Accton’s Service Department at the address listed below. If you ship the product, you must assume the risk of damage or loss in transit. You must use the original container (or the equivalent) and pay the shipping charge.
Fast EtherHub-12s User’s Guide Accton Offices Accton Australia, Level 6, 10 Help Street Chatswood, N.S.W. 2067 Australia Phone: 61-2-9410-9860 Fax: 61-2-9410-9861 BBS: 61-2-9410-9862 Internet: http://www.accton.com.au Accton Technology Corporation International Headquarters, No. 1 Creation Rd. III, Science-based Industrial Park, Hsinchu 300, Taiwan, R.O.C.
Glossary 100BASE-TX IEEE’s specifications for 100 Mbps Ethernet using twisted-pair cable (100W Cat. 5 STP or UTP). The maximum length of cable for a point-to-point connection is 100 meters. Collision A condition in which two packets transmitted over a medium interfere with each other. Their interference makes both signals unintelligible. The transmitting devices have to halt transmission for a random period of time before trying to send data again.
Fast EtherHub-12s User’s Guide Fast Ethernet 100 Mbps network communication system based on Ethernet and the CSMA/CD access method. IEEE 802.3 Standard Standard for the physical and electrical connections in local area networks developed by the IEEE. The IEEE 802.3u standard covers these same issues for 100 Mbps networks. LED Light emitting diode on the front panel of the hub used for monitoring a hub or network condition. An LED display corresponds to a hub condition.
Fast EtherHub-12s User’s Guide Shielded Twisted-Pair (STP) 100W Category 5 twisted-pair wire covered with an external aluminum-foil or wovencopper shield designed to reduce excessive noise pick up or radiation. The STP cable refered to in this manual is also sometimes called screened twisted-pair (ScTP). Its impedance is 100Wand has the same pin assignment as UTP. This cable should not be confused with the older 150Wcable type designed by IBM.
Index Front Panel • 4-1 A G Accton's Fast EtherHub-12s • 1-1 Automatic Partitioning • 1-3 Automatic Polarity Detection • 1-3 Guidelines for Multiple Hub Configuration • 3-3 C H Cable Length Precise Cable Length Budgeting • 2-4 Simplified Cable Length Constraints • 2-4 Certification • C-1 Class II Repeater • 2-5, 3-3 Configuring the Network • 3-1 Connecting Multiple Hubs • 3-2 Connecting the Hub System • 2-2 Connection, Verifying • 2-6 Crossover Cable • B-1 Hardware Description • 4-1 D J Daisy-Cha
Fast EtherHub-12s User’s Guide Certification • C-1 Interfaces • C-1 Media Supported • C-1 Power System • C-1 Standards Conformance • C-1 Stand-alone Configuration • 3-1 Standards Compliance • D-1 M Maximum Cable Length • 2-4 MDI Daisy-chain Port • 3-2 N Network Connection MDI Daisy-Chain Port • 2-3 MDI-X Station Port • 2-2 T Troubleshooting • 4-5 Configuration • A-3 Hub Indicators • A-1 Installation • A-2 Power and Cooling • A-2 Twisted-pair Cable Category 3,4,5 • 2-2, A-2 P Port and Cable Assignments •
EH3012-TX 150114-101 E0197-R02
