Allied Telesyn AT-FH708SW Dual Speed Hubs Installation Guide

Allied Telesyn AT-FH708SW Dual Speed Hubs Installation

Product Information

Specifications

• Model Numbers: AT-FH708SW, AT-FH712SW, AT-FH716SW, AT-FH724SW, AT-FH716
• Compliance: FCC Part 15B, Class B Limits
• EMC Standards: EN55022 (1988)/CISPR-22(1985) Class B
• IEC1000-4-2(1995): 4kV CD, 8kV AD
• IEC1000-4-3(1995): 3V/m
• IEC1000-4-4(1995): 1kV (power line), 0.5kV (signal line)
• IEC1000-4-6(1995): 3Vrms

Product Usage Instructions

Installation Guide
To install the AT-FH700 Series Hubs, please follow the steps below:

1. Choose an appropriate location for the hub.
2. Ensure that the hub is powered off and disconnected from the power source.
3. Connect the appropriate shielded twisted-pair cables to the RJ45 ports on the hub. Use Category 3, 4, or 5 cables for 10 Mbps connections and Category 5 cables for 100 Mbps connections.
4. Connect the other end of the cables to the respective devices you want to connect to the hub.
5. Power on the hub and wait for it to initialize.
6. Verify that the devices connected to the hub are functioning correctly.

Stacked Configuration
The AT-FH708SW, AT-FH712SW, AT-FH716SW, AT-FH724SW, and AT-FH716 hubs can be stacked in a configuration. Follow the instructions below:

1. Place the hubs in a stacked configuration, ensuring proper alignment.
2. Connect the stacked hubs using the appropriate shielded twisted-pair cables.
3. Connect the devices to the stacked hubs using shielded twisted-pair cables.
4. Power on the hubs and wait for them to initialize.
5. Verify that the devices connected to the stacked hubs are functioning correctly.

FAQ

• Q: What type of cables should I use with the AT-FH700 Series Hubs?
  A: For 10 Mbps connections, use Category 3, 4, or 5 shielded twisted-pair cables. For 100 Mbps connections, use Category 5 shielded twisted-pair cables.

• Q: Can I stack multiple AT-FH700 Series Hubs?
  A: Yes, you can stack multiple AT-FH708SW, AT-FH712SW, AT-FH716SW, AT-FH724SW, and AT-FH716 hubs in a stacked configuration.

• Q: How do I connect devices to the stacked hubs?
  A: Connect the devices to the stacked hubs using appropriate shielded twisted- pair cables.

• Q: What should I do if the hub causes radio interference?
  A: If the hub causes radio interference, make sure you are using shielded cables. If not, switch to shielded cables to reduce interference levels.

Copyright  1999 Allied Telesyn International, Corp. 960 Stewart Drive Suite B, Sunnyvale CA 94086 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. reserves the right to make changes in specifications and other information contained in this document without prior written notice. The information provided herein is subject to change without notice. In no event shall Allied Telesyn International, Corp. be liable for any incidental, special, indirect, or consequential damages whatsoever, including but not limited to lost profits, arising out of or related to this manual or the information contained herein, even if Allied Telesyn International, Corp. has been advised of, known, or should have known, the possibility of such damages.

Statements
AT-FH708SW, AT-FH712SW, AT-FH716SW, AT-FH724SW or AT-FH716 in a Stacked Configuration

FCC Warning

RADIATED ENERGY
U.S. Federal Communications
Note: This equipment has been tested and found to comply with the limits for a Class A digital device under Part 15 of FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used per this instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.
Note: Modifications or changes not expressly approved of by the manufacturer or the FCC, can void your right to operate this equipment.
Use Category 3, 4, or 5 unshielded or shielded twisted-pair cable for all 10 Mbps RJ45 connections, and Category 5 unshielded or shielded twisted-pair for all 100 Mbps RJ45 connections.

Class A (Canada Department of Communications)
Industry Canada
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.

CE Mark Warning
This is a Class A product. In a domestic environment, this product may cause radio interference in which case the user may be required to take adequate measures.
This is to certify that this product complies with ISO/IEC Guide 22 and EN45014. It confirms the following specifications:

EMC: EN55022 (1988)/CISPR-22(1985) Class A

• IEC1000-4-2(1995) 4kV CD, 8kV AD
• IEC1000-4-3(1995) 3V/m
• IEC1000-4-4(1995) 1kV – (power line), 0.5kV – signal line
• IEC1000-4-6(1995) 3Vrms

U.S. Federal Communications Commission
DECLARATION OF CONFORMITY

• Manufacture Name: Allied Telesyn International, Corp.
• Manufacture Address: 960 Stewart Drive, Suite B
• Sunnyvale, CA 94086 USA
• Manufacture Telephone: 408-730-0950
• Declares that the Product: Dual-speed hubs
• Model Numbers: AT-FH708SW, AT-FH712SW, AT-FH716SW, AT-FH724SW, AT-FH716

This product complies with FCC Part 15B, Class B Limits:
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device must not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

RADIATED ENERGY
Note : This equipment has been tested and found to comply with the limits for a Class B digital device according to Part 15 of FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used under instructions, may cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on; the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

Changes and modifications not expressly approved by the manufacturer or registrant of this equipment can void your authority to operate this equipment under Federal Communications Commission rules.
WARNING : This product requires only Category 3, 4, or 5 shielded twisted-pair cable for all 10 Mbps RJ45 connections, and Category 5 shielded twisted-pair for all 100 Mbps RJ45 connections to comply with Class B emission limits. If not used with shielded cables, this product may cause radio interference in which case the user may be required to take adequate measures to reduce interference levels.

Canadian Department of Commissions
This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.

CE Mark Warning
This is to certify that this product complies with ISO/IEC Guide 22 and EN45014. It confirms to the following specifications:
EMC: EN55022 (1988)/CISPR-22(1985) Class B

• IEC1000-4-2(1995) 4kV CD, 8kV AD
• IEC1000-4-3(1995) 3V/m
• IEC1000-4-4(1995) 1kV – (power line), 0.5kV – signal line
• IEC1000-4-6(1995) 3Vrms

Warning
This product requires shielded cables to comply with Class B emission limits. If not used with shielded cables, this product may cause radio interference in which case the user may be required to take adequate measures.
This product complies with the requirements of the Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC.

Warning
Do not plug a phone jack connector in the RJ45 port. This may damage the device.

AT-FH708SW, AT-FH716SW and AT-FH716 in a Stacked or Standalone Operation
Safety Compliance
Underwriters Laboratories, Inc. (USA)

Safety Compliance CSA/NRTL
Important! Before making connections, make sure you have the correct cord set.

Product Description

Overview
This chapter describes the features of the AT-FH700 Series of stackable dual- speed Fast Ethernet hubs:

• AT-FH708SW
• AT-FH712SW
• AT-FH716SW
• AT-FH724SW
• AT-FH716

The AT-FH700 Series hubs were designed to provide a compact, flexible solution for corporate workgroups or small and medium businesses. These hubs provide 8, 12, 16 and 24 dual-speed ports (10/100 Mbps). The hubs contain two internal repeater buses: one for 10 Mbps traffic and another for 100 Mbps traffic. The AT-FH708SW, AT-FH712SW, AT-FH716SW and AT-FH724SW hubs include an integrated two-port switch module that connects the 10 Mbps and 100 Mbps repeater buses. The switch module allows communications between devices operating at different speeds. On the AT-FH716 model, traffic between connected devices of the same speed are confined within the appropriate repeater bus. Each of these ports automatically senses the speed of the attached device, and channels the data to the appropriate 10 Mbps or 100 Mbps segment.

Table 1 summarizes the features of each hub model:
Table 1 AT-FH700 Series Hub Models and Description

Note For definitions of technical terms associated with Allied Telesyn’s products, refer to the Glossary on Allied Telesyn’s website at www.alliedtelesyn.com.

Key Features

The AT-FH700 Series hubs provide the following key features:

• IEEE 802.3 (10Base-T) and IEEE 802.3u (100Base-TX) compliant

• Class II repeater

• 8, 12, 16 and 24 10/100 Mbps dual-speed Fast Ethernet ports (RJ45 connectors)

• Category 5 UTP/STP cables for 10 Mbps and 100 Mbps transmissions; Category 3 UTP cables for 10 Mbps transmission only

• Auto-negotiate for 10/100 Mbps transmission speed

• Stacked configuration of up to six hubs with the use of a cascade cable, or standalone configuration

• Integrated switch module in the AT-FH708SW, AT-FH712SW,
  AT-FH716SW and AT-FH724SW models to allow transmissions between 10 Mbps and 100 Mbps devices connected to the hub stack

• Desktop or rack mounting options

Front Panels
Figure 1 through Figure 3 shows the hub front panels.

Front Panel LEDs
The AT-FH700 Series hubs’ front panel LEDs provide status in three areas:

• System-wide status
• Segment status
• Per-port status

For detailed explanations on the hubs’ front panel LEDs, see Table 2.
Table 2 LED Indicators

Front Panel Connectors
All network ports on the AT-FH700 Series hubs use shielded RJ45 connectors. For 10 Mbps connections, use Category 3 or above. For 100 Mbps connections, use Category 5 or above cables only.

MDI /MDI-X Switch
Each hub has an MDI/MDI-X switch associated with either Port 8, Port 12, Port 16 or Port 24. The switch changes the associated port between MDI and MDI-X. The two settings provide you the flexibility of connecting any type of device with a straight-through cable:

• To Hub (in), for cascading to a switch or another hub
• To PC (out), for connection to a DTE (an end station or server)

Refer to Chapter 2 for additional information on cable lengths when cascading hubs.

Rear Panel
The rear panel shown in Figure 7 is common to all models.

Power Supply and Fan
Power connection to the AT-FH700 Series hubs are done through the power receptacle in the rear panel. The hubs use a universal internal switching power supply with 100 to 120 VAC, or 200 to 240 VAC (autoranging), 50/60 Hz input rating. The maximum power consumption is 27W. Cooling fans help maintain the hub’s optimal temperature.

Stacking Connectors
Each AT-FH700 Series hub has two stacking connectors in the rear panel, In and Out, for inter-repeater connectivity. You can connect up to six hubs in a stack. Allied Telesyn supplies one stacking cable with each hub.
The hubs are fully stackable based on the following parameters:

• Units can be used as standalone units, or up to six units can be stacked using stacking cables-either SW, non-SW or both in combination.
• At least one SW unit is required to enable full communication for all ports.
• Where multiple SW units are stacked, any redundant switch circuits are automatically disabled.

More details on using the stacking connectors are described later in Chapter 2.

Rackmount Options
Rackmount kits are provided if you want to install your hubs in a standard 19-inch rack. Procedures for rackmounting are provided in Chapter 2.

Installation

Verifying Package Contents
Make sure that the package includes the following items:

• One AT-FH700 Series hub
• One AC power cord
• Two rackmount brackets and eight screws
• Four self-adhesive rubber feet
• One stacking cable
• Warranty card
• This installation guide

If any of the above items is damaged or missing, contact your representative immediately.

Site Requirements
Make sure you observe the following site requirements:

• Choose a location that is less than 100 m (328 ft) away from servers, workstations, or switches.

Caution
Category 5 UTP/STP cables are environment-sensitive. Make sure the cable route is not too close to electrical noise sources such as power lines or fluorescent lights.

• Place the hub in a dust-free and moisture-free environment.
• Do not block ventilation openings on the unit.
• Do not place heavy objects on top of the hub.
• Use dedicated power circuits or power conditioners to supply power to the hub.

Standalone Desktop Installation

1. Attach the four self-adhesive rubber feet to the bottom of the hub, positioning them in the indentations.

2. Place the hub on a flat, level surface where power is easily accessible.

3. Attach one end of the power cord to the back of the hub and the other end to the power source.
   Make sure the Power LED on the front panel is green.

4. Attach the data cables and observe normal operation as indicated by the port LEDs.

You are done with standalone desktop installation.

Rack mounting the Hubs
You will need a Phillips screwdriver for this installation.

1. Disconnect all data cables and then the power cord, if attached.
2. Attach the brackets to the side of the hub with the screws provided. See Figure 8.
3. Mount the hub to the 19-inch rack using standard screws (not provided). See Figur e9.
4. Reconnect the power cord and then the data cables.

Stacking the Hubs
A stacking feature in each AT-FH700 Series hub’s rear panel gives you the advantage of stacking up to six AT-FH700 Series hubs and still has all front panel ports available for station connections. Stacking six 16-port hubs provides you a maximum of 96 connections belonging to the same collision domain.
Allied Telesyn ships a stacking cable with every AT-FH700 Series hub. Do not use any other cable with the hubs’ stacking ports.

To stack the hubs with the stacking cables:

1. Connect one end of the cable to the Out port of the top hub.
2. Connect the other end to the In port of the next hub. See Figur e10.
3. Connect additional hubs using the same scheme (up to 6 hubs), and using only the stacking cable that came with your hub.

See the section, Connecting Network Devices” beginning on page 13, for additional information on connecting 10 Mbps and 100 Mbps workstations and cabling restrictions when cascading hubs.

Connecting Network Devices
This section shows you how to connect:

• Ethernet and Fast Ethernet workstations
• An external Fast Ethernet switch
• A hub with the integrated switch module (either the AT-FH708SW, AT-FH712SW, AT-FH716SW or AT-FH724SW)
• Other network devices via cascading

This section also includes important information on cable length restrictions when cascading hubs.

Connecting Ethernet or Fast Ethernet Workstations
Use a straight-through wired UTP Cat 5 cable with RJ45 connectors to connect either a 10Base-T or 100Base-TX device directly to the hub’s port (1 through 16). Do not exceed a maximum of 100 m (328 ft). The hub’s autosensing capability does not require additional user configuration and enables transmission between devices of the same speeds (stations A and B in Figur e11).

When using the AT-FH716 model as in Figu re11, a 10 Mbps device (station A or B) cannot transmit to a 100 Mbps device (station C or D).

Using An External Switch (AT-FH716)
If you require communication between devices of different transmission speeds across different domains, you may install an external 10/100 Mbps Fast Ethernet switch to the AT-FH716 hub (Figu re12).

With the external switch solution, two separate hub ports are required, one for 10 Mbps communication, and the other for 100 Mbps. On the hub, use the port with an associated MDI/MDI-X switch to make one of the connections to the 10/100 Mbps external switch. On the external switch, configure one of its ports to enforce 10 Mbps fixed transmission speed. This way, devices belonging to the 10 Mbps domain can transmit information to devices in the 100 Mbps domain via the external switch, and vice versa.

Using the Integrated Switch Module

• Using a hub with the integrated switch module (models AT-FH708SW, AT-FH712SW, AT-FH716SW or AT-FH724SW) is the easiest and most cost-effective solution to enable communication between devices of dissimilar speeds. You can use either of these hub models for simple standalone configurations to connect both 10 Mbps and 100 Mbps devices.
• In Figure 13, an AT-FH716SW hub becomes part of a hub stack to which workstations of varying speeds are connected. The AT-FH716SW’s switching module enables the exchange of information between 10 Mbps and 100 Mbps stations. The learning function of the internal switch module stores the node address and the corresponding segment number (i.e., bus 1 or 2) of each incoming packet in a routing table. This information is 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 within its respective collision domain, the overall load on the network is significantly reduced
• Concerning multiple switching modules and auto-bypass support:
• When using more than one AT-FH708SW, AT-FH712SW, AT-FH716SW or AT-FH724SW in a stack, only one hub with a switching module will be active at any time-the active module will be the uppermost. Stacking order is unimportant, the switching module does not have to be on top; however, if there are two switching modules in a stack, then the uppermost module is active and the lower one is in standby mode.

Note
The stack with multiple switches cannot operate correctly if there is a unit powered off between two switch units.

Connecting Devices to the MDI/MDI-X Ports
The last port of the hub (Port 8, Port 12, Port 16 or Port 24) has an associated MDI/MDI-X switch that changes the port from MDI to MDI-X, and vice versa.
Connect any 10 Mbps or 100 Mbps device to the port with a straight-through cable and use the following settings:

• Push the switch In (To Hub, or MDI) and cascade to a switch or another hub to the port.
• Push the switch Out (To PC, or MDI-X) and connect a DTE (an end station or server) to the port.

Cable Length and Cascading Considerations
When cascading to another hub, the attached hubs function as a single logical hub, and all ports on the attached hubs belong to the same collision domain. You must consider the following restrictions on cable lengths and number of cascaded hubs:
When cascading to a Fast Ethernet hub, limit the cascade to two hubs. All end- node devices (workstations or servers) must be within 100 m (328 ft) of the hub. Overall length between any two nodes must not exceed 205 m (672 ft). The easiest way to cascade two Fast Ethernet hubs is to connect the MDI port on the front panel to an MDI-X port on the other hub. For example, if End Nodes A and B are linked to separate hubs in a two-hub system, each using 100 m (328 ft) of cable to connect to their respective hubs, then the inter-hub cabling is limited to 5 m (16 ft). The only way to extend inter-hub cabling is to reduce the cable length attaching the end nodes to their hubs. Based on the IEEE 802.3 specification, up to four 10 Mbps hubs can be connected on a 10 Mbps cascade.

Troubleshooting

This chapter provides information to help you resolve problems you might encounter while using the hubs.

Contacting Allied Telesync’s Technical Support
If you are unable to fix any problems with the hub after trying the procedures in this chapter, contact Allied Telesyn’s technical support department. Before doing so, be prepared to give the following information:

• Your equipment’s model number
• A detailed description of the problem

Refer to Appendix D, “Where To Find Us,” for a list of Allied Telesyn worldwide locations.

Verifying System Information
Verify that all attached devices have a valid connection. The hub monitors the link status for each port. If any device is properly connected and transmitting a link beat signal, the Link indicator on the front panel, lights up for the corresponding port. If the Link indicator fails to light up when you connect a device, check the following:

• Be sure the twisted-pair cable is properly attached to the connected device and the hub. The media connectors snap firmly into place when attached.
• Check if the cable is functioning properly by using it on another port and device that is known to be working correctly.
• Make sure the cable length does not exceed 100 m (328 ft). If you have cascaded two Fast Ethernet hubs together, be sure the interweb cabling does not exceed 5 m (16 ft).
• Verify that the workstation’s adapter card is functioning properly by installing it in another workstation that has been successfully connected to the network.
• Make sure all hubs cascaded together are powered up.

Diagnosing Hub Indicators
You can easily monitor the hub through its front panel indicators. This section describes common problems you may encounter and possible solutions.

• Symptom: Link 10/100 indicator does not light up after making a connection.
• Cause: Network interface (e.g., a network adapter card in the attached device), 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 the 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 card or cable if necessary.
• Symptom: Power indicator does not light up (green) after powering on.
• Cause: Power outlet, power cord, or internal power supply is defective.
• Solution: Check the power outlet by plugging in another device that is known to function properly. Check the power cord with another device. If these measures do not work, there might be a problem with the power supply. Contact the nearest Allied Telesyn location.

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 previously discussed. However, if the unit powers off after running for a while, check for loose power connections or power surges. Make sure the fan on the back of the unit is unobstructed and running when power is reapplied to the hub. If the fan is not running, call Allied Telesyn.

Appendix A

Product Specifications for the AT-FH700 Series Hubs

• Standards Supported IEEE 802.3 10Base-T Ethernet
  IEEE 802.3u 100Base-TX Ethernet

• Media Category 5 UTP/STP (10 Mbps and 100 Mbps)
  Category 3 UTP (10 Mbps only)

Number of Ports

• AT-FH708SW Eight 10/100 Mbps, auto-negotiating, RJ45 connectors
• AT-FH712SW Twelve 10/100 Mbps, auto-negotiating, RJ45 connectors
• AT-FH716 and AT-FH716SW Sixteen 10/100 Mbps, auto-negotiating, RJ45 connectors
• AT-FH724SW Twenty-four 10/100 Mbps, auto-negotiating, RJ45 connectors
• Segments One 10 Mbps
  One 100 Mbps

LED Indicators

• Per device Power

• Per segment Collision, Activity

• Per port Link 10/100M, Partition

• MDI/MDI-X One port (Port 8, Port 12 or Port 16) associated with MDI/MDI-X switch

• Hub Stacking 6 hubs per stack via stacking cables

• Integrated Switch Module
  AT-FH708SW, AT-FH712SW, AT-FH716SW and AT-FH724SW
  For the 10 Mbps and 100 Mbps segment communication; 10/100 Mbps rate adoption and packet filtering between the two collision domains; store and forward mode

• Mounting Brackets for 19-inch rack mounting

Physical Specifications

• Dimensions 330 x 204 x 44 mm (13 x 8 x 1.72 in)
• Weight 2.1 kg (4.6 lb)

Electrical Specifications

• Input line frequency 50-60 Hz
• Input voltage 100-240 VAC
• AC Power consumption 100-240 VAC, 50/60 Hz, 0.5A

Environmental Specifications

• Operating temperature 0° to 50° C

• Storage temperature –30° to 60° C

• Operating humidity 5% to 95% non-condensing

• Electromagnetic Immunity IEC 1000-4-2/3/4/6

• Safety Agency Approvals UL, CSA, TUV/GS on all models except AT-FH712SW, AT-FH724SW
  CSA/NRTL, TUV/GS on the AT-FH712SW, AT-FH724SW

• EMI Certifications CE Mark
  FCC Class A in stacked configuration FCC Class B in a standalone configuration

Technical Support Fax Order

Appendix B

Incident Summary

Appendix C
AT-FH700 Series Hubs 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 the page. Your comments are valuable when we plan future revisions of the guide.

Please fax or mail your feedback. Fax to 1-408-736-0100. Or mail to: Allied Telesyn International, Corp.
c/o Technical Communications
960 Stewart Drive, Suite B
Sunnyvale, CA 94086 USA
PN 613-10710-00 Rev G

Appendix D
Where To Find Us

For Sales or Corporate Information

Allied Telesyn International, Corp.
19015 North Creek Parkway
Bothell, WA 98011
Tel: 1 425-487-8880
Fax: 1 425-489-9191

Allied Telesyn International, Corp.
960 Stewart Drive, Suite B
Sunnyvale, CA 94086
Tel: 1 800-424-4284 (USA and Canada)
Fax: 1 408-736-0100
World Wide Web: http://www.alliedtelesyn.com

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