AT-FH812u AT-FH824u AT-FH812u-SW AT-FH824u-SW Fast Ethernet 10/100 Hubs Version 2 Installation Guide PN 613-10753-00 Rev G
Copyright 2000 Allied Telesyn International, Corp. 960 Stewart Drive Suite B, Sunnyvale CA 94085 USA All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesyn International, Corp. Ethernet is a registered trademark of Xerox Corporation. All other product names, company names, logos or other designations mentioned herein are trademarks or registered trademarks of their respective owners. Allied Telesyn International, Corp.
Agency Compliance EMI Certification FCC Class A (USA) 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 digital 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.
Agency Compliance It conforms to the following specifications: ! Emissions: EN55022 (1988)/CISPR-22 (1985) class A ! Immunity: EN50082-1 ! EN60555-2 (1995) class A ! EN60555-3 Warning Do not plug a phone jack connector in the RJ-45 port. This may damage this device. Safety Compliance Warning Before making connections, make sure you have the correct Cord Set. Check it (read the label on the cable) against the following specification list.
Table of Contents Agency Compliance ................................................................................................................................ ......................iii Welcome to Allied Telesyn ................................................................................................................................ ......... vii Where to Find Web-based Guides ........................................................................................................................
Table of Contents Chapter 3 Troubleshooting ................................................................................................................................ ........................... 15 Diagnosing Hub LEDs ................................................................................................................................ .............. 15 Power and Cooling Problems..................................................................................................................
Welcome to Allied Telesyn This guide contains instructions on how to install and configure a AT-FH800 Series Fast Ethernet Hub. Where to Find Web-based Guides The Allied Telesyn web site at www.alliedtelesyn.com provides you with an easy way to access the most recent documentation and technical information for all of our products. For product guides, you can go directly to the following web page: www.alliedtelesyn.com/support/prd_libs.htm.
Welcome to Allied Telesyn Contacting Allied Telesyn Technical Support There are several ways to contact Allied Telesyn technical support: online, telephone, fax or e-mail. Online Support Telephone and Fax Support E-mail Support You can request technical support online by filling out the Online Technical Support Form at www.alliedtelesyn.com/forms/support.htm. For Technical Support via fax, please fill out the “Technical Support Fax Order” on page 23 and send it to the appropriate location listed below.
AT-FH800 Series Installation Guide Returning Products Products for return or repair must first be assigned a Return Materials Authorization (RMA) number. A product sent to Allied Telesyn without a RMA number will be returned to the sender at the sender’s expense.
Chapter 1 Introduction The AT-FH800 Series Fast Ethernet Hubs include the following models: ! AT-FH812u ! AT-FH812u-SW ! AT-FH824u ! AT-FH824u-SW The AT-FH812u (shown in Figure 1) and AT-FH824u are manageable and stackable Ethernet hubs with 12 or 24 dual-speed (RJ-45) ports. One slot is used for an Optional Agent Module, and another slot for an Optional Switch Module. The 12 and 24 port AT-FH812u-SW and AT-FH824u-SW are base unit with optional switch modules installed.
Introduction These dual-speed hubs include a wide range of configuration options. They can be stacked together (up to 6 high) to form a dual-speed network of up to 72/144 ports. With a Class II rating, they can also be easily cascaded to additional 10 or 100 Mbps hubs. When the switch module is installed, it links the hub's internal 10 Mbps and 100 Mbps repeater buses together to form a segmented network, allowing traffic to pass between the segments when required.
Chapter 2 Installation Verifying Package Contents Make sure your package contains the following items. ! One AT-FH800 Series Fast Ethernet Hub ! Four rubber foot pads ! Stack cable ! Rack mount bracket kit ! AC power cord ! This installation guide ! Warranty card Pre-Installation Requirements Prior to installing your hub, make sure you observe the following cabling and installation environment requirements. The hub can be placed directly on your desktop or mounted in a rack.
Installation Stacking Hubs on a Flat Surface Rack-Mounting the Hubs The hub can be stacked on a secure table or desktop. 1. Attach the self-adhesive rubber foot pads (that come with this package) on each of the 4 concave spaces located on the bottom of the first hub. 2. Place the first hub on a firm flat surface where you want to install the stack. 3. Repeat Step 1 for each hub before stacking them.
AT-FH800 Series Installation Guide Making a Connection via an MDI-X Station Port You can connect any RJ-45 (MDI-X) station port on the hub to any device that uses a standard network interface such as a PC or server, or to a network interconnection device such as a bridge or router (depending on the port type implemented). 1. Prepare the network devices you wish to network. Make sure you have installed 10Base-T or 100Base-TX network interface cards for connecting to the hub's RJ-45 (MDI-X) station ports.
Installation Making a Connection via the MDI Daisy-Chain Port 1. To make a direct connection to a compatible hub or switch, use the MDI daisychain port (Port 12/24). When connecting to this port, remember to set the port selection switch to MDI. You can also connect any RJ-45 (MDI-X) port on the hub to an MDI daisy-chain port on the other device. 2. Prepare straight-through shielded or unshielded twisted-pair cables with RJ45 plugs at both ends.
AT-FH800 Series Installation Guide 10Base-T Cascade Rule A maximum of four hubs/repeaters can be cascaded within the same 10Base-T collision domain Figure 4 10Base-T Cascade Configuration 7
Installation 10Base-T Cascade Rule A maximum of four hubs/repeaters can be cascaded within the same 10Base-T collision domain Figure 5 100Base-TX Cascade Configuration 8
AT-FH800 Series Installation Guide Using an Optional Module The upper slot on the front of the hub is provided for installing anyone of the 3 different Switch Modules or Media Expansion Modules (also referred to as an uplink module). The Switch Module is used to bridge the internal 10 and 100 Mbps repeater buses, the twisted-pair and fiber optic uplink modules are used to link the stack to other segments or to a remote site.
Installation Using the Agent Module (AT-FH805u) To manage the hub (or stack), you must install an optional Agent Module, AT-FH805u, in the lower slot on the front of the hub (See Figure 6). Once you have installed the module, you will be able to manage the system via a direct connection to the serial port on the front of the module (using a console or modem connection).
AT-FH800 Series Installation Guide Using the 100Base-FX Module (AT-FH807u) You can connect to a remote site using the fiber optic uplink module AT-FH807u. These modules act as a two-port switch, interfacing the internal repeater buses to the attached device. SC fiber module is available. It connects to both the internal 10 and 100 Mbps repeater bus, but operates only at 100 Mbps for the external connection. The default setting of this module is auto-negotiate (see Figure 8).
Installation Before using the 100Base-TX module, prepare Category 5 straight-through twisted-pair cable with RJ-45 plugs at both ends. When connecting the module directly to an end-node device (e.g., a workstation or file server), a bridge or router, run cable from the MDI-X port on the uplink module to the target device.
AT-FH800 Series Installation Guide Verifying Port Status Figure 10 depicts Port LEDs. Check each connection by comparing the port status LEDs with Table 1. Figure 10 Port LEDs Table 1 lists and defines the hub’s LEDs.
Installation Verifying System Operation Verify that all attached devices have a valid connection. The hub monitors the link status for each port. If any device is properly connected to the hub and transmitting a link beat signal, the Link LED will light up for the corresponding port. If the Link LED fails to light when you connect a device to the hub, check the following items: ! Be sure all network cables and connectors are properly attached to the connected device and the hub.
Chapter 3 Troubleshooting Diagnosing Hub LEDs The hub can be easily monitored through panel LEDs to assist the network manager in identifying problems. This section describes common problems you may encounter and possible solutions. Symptom. 10/100M Link LED does not light up after making a connection. Cause. Network interface, for example a network adapter card on the attached device, network cable, or hub port is defective. Solution. Verify that the hub and attached device are powered on.
Troubleshooting Cabling Verification Network Adapter Verification RJ-45 Port and Cable Assignments 1. Verify that the cabling type is correct. Be sure all cable connectors are securely seated in the required ports. Use 100 Ohm Category 5 straight-through cable for all standard twisted-pair connections. 2. Make sure all devices are connected to the network. Equipment may have been unintentionally disconnected from the network. 3.
AT-FH800 Series Installation Guide Port assignments per pin are defined in Table 2, below. Schematics for both straight and crossover twisted-pair cable are shown in Figure 12 and Figure 13.
Appendix A Technical Specifications Base Unit Access Method CSMA/CD, 10 Mbps or 100 Mbps Standards Conformance IEEE 802.3 10Base-T, IEEE 802.
Technical Specifications Network Criteria1 Hub-to-Workstation Distance 100 meters maximum using twisted-pair cable Inter-hub Distance 10 Mbps link: 100 meters using twisted-pair cable 100 Mbps link: 5 meters using twisted-pair cable (assumes 100 meters from each node to the hub) Total Network Span 200 meters of twisted-pair cable Single Hub (100 meters to each attached node) Two-hub Chain1 205 meters of twisted-pair cable (100 meters to each attached node, and 5 meters between hubs) 1.
AT-FH800 Series Installation Guide AT-FH806u Switch Module AT-FH807u Uplink Module AT-FH808u Uplink Module Network Bridging Function filtering, forwarding and learning Address Table 4K entries Queue Buffer 1M shared memory Address Resolution via fast hashing scheme Filtering Rate 14,880 pps at 10 Mbps, 148,800 pps at 100 Mbps Forwarding Rate 14,880 pps at 10 Mbps, 148,800 pps at 100 Mbps 100Base-FX Access Method CSMA/CD, 100 Mbps Standards Conformance IEEE 802.
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Appendix C AT-FH800 Series Installation Guide Feedback Please tell us what additional information you would like to see discussed in this guide. If there are topics you would like information on that were not covered in this guide, please photocopy this page, answer the questions and fax or mail this form back to Allied Telesyn. The mailing address and fax number are at the bottom of this page. Your comments are valuable when we plan future revisions of this guide.
