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Summary of Contents for Allied Telesis AT-MR420T
- Page 1 ® CentreCOM AT-MR420T AT-MR820T Multiport Micro Repeaters Installation Guide PN 613-10624-00 Rev A...
- Page 2 Copyright ©1997 Allied Telesyn International Corp. All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesyn International Corp. 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.
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Page 3: Electrical Safety And Installation Requirements
Electrical Safety and Installation Requirements STANDARDS: This product meets the following standards U.S. Federal Communications Commission RADIATED ENERGY Note: This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. - Page 4 INSTALLATION ELECTRICAL—AUTO VOLTAGE ADJUSTMENT This product will automatically adjust to any voltage between the ranges shown on the label. ELECTRICAL—TYPE CLASS 1 EQUIPMENT THIS EQUIPMENT MUST BE EARTHED. Power plug must be connected to a properly wired earth ground socket outlet. An improperly wired socket outlet could place hazardous voltages on accessible metal parts.
- Page 5 NETZKABEL Das Netzkabel sollte eine maximale Länge von 4,5 Metern, einen Nennwert von mindestens 6 A und 250 V haben, aus HAR-Material hergestellt und mit einer gepreßten, IEC 320 entsprechenden, Anschlußverbindung an einem Ende, und am anderen Ende mit einem im Land des Endverbrauchers geprüften Stecker ausgestattet sein.
- Page 6 Ventilationsåbninger må ikke blokeres og skal have fri adgang til den omgivende luft i rummet for afkøling. BETJENINGSTEMPERATUR Dette apparat er konstrueret til en omgivende temperatur på maksimum 50 grader C. ALLE LANDE: Installation af produktet skal ske i overensstemmelse med lokal og national lovgivning for elektriske installationer.
- Page 7 NORMES: ce produit est conforme aux normes de suivantes : Emission d’interférences radioélectriques EN55022 Classe A MISE EN GARDE: dans un environnement domestique, ce produit peut provoquer des interférences radioélectriques. Auquel cas, l’utilisateur devra prendre les mesures adéquates. Immunité EN50082 - 1 NORMES: ce produit est conforme aux normes de suivantes.
- Page 8 Standardit: Tämä tuote on seuraavien standardien mukainen. Radioaaltojen häirintä EN55022 Luokka A VAROITUS: Kotiolosuhteissa tämä laite voi aiheuttaa radioaaltojen häiröitä, missä tapauksessa laitteen käyttäjän on mahdollisesti ryhdyttävä tarpeellisiin toimenpiteisiin. Kestävyys EN50082-1 Standardit: Tämä tuote on seuraavien standardien mukainen. UL on turvatestannut nämä tuotteet Standard 1950 mukaisesti, CSA standardin CSA 950 mukaisesti ja TUV standardin EN60950 mukaisesti.
- Page 9 Standard: Questo prodotto è conforme ai seguenti standard. Emissione RFI (interferenza di radiofrequenza) EN55022 Classe A AVVERTENZA: in ambiente domestico questo prodotto potrebbe causare radio interferenza. In questo caso potrebbe richiedersi all’utente di prendere gli adeguati provvedimenti. Immunità EN50082-1 Standard: Questo prodotto è conforme ai seguenti standard. Questi prodotti sono stati sottoposti a collaudi di sicurezza dai seguenti enti: dalla UL in conformità...
- Page 10 Sikkerhetsnormer: Dette produktet tilfredsstiller følgende sikkerhetsnormer. RFI stråling EN55022 Klasse A ADVARSEL: Hvis dette produktet benyttes til privat bruk, kan produktet forårsake radioforstyrrelse. Hvis dette skjer, må brukeren ta de nødvendige forholdsregler. Immunitet EN50082-1 Sikkerhetsnormer: Dette produktet tilfredsstiller følgende sikkerhetsnormer. Disse produktene er blitt sikkerhetstestet av UL i forhold til standard 1950, CSA i forhold til CSA 950, og av TUV i forhold til EN60950.
- Page 11 Padrões: Este produto atende aos seguintes padrões. Emissão de interferência de radiofrequência EN55022 Classe A AVISO: Num ambiente doméstico este produto pode causar interferência na radiorrecepção e, neste caso, pode ser necessário que o utente tome as medidas adequadas. Imunidade EN50082-1 Padrões: Este produto atende aos seguintes padrões.
- Page 12 Estándares: Este producto cumple con los siguientes estándares. Emisión RFI EN55022 Clase A ADVERTENCIA: en un entorno doméstico, este producto puede causar radiointerferencias, en cuyo caso, puede requerirse del usuario que tome las medidas que sean convenientes al respecto. Inmunidad EN50082-1 Estándares: Este producto cumple con los siguientes estándares.
- Page 13 Standarder: Denna produkt uppfyller följande standarder. Radiostörning EN55022 Klass A VARNING: Denna produkt kan ge upphov till radiostörningar i hemmet, vilket kan tvinga användaren till att vidtaga erforderliga åtgärder. Immunitet EN50082-1 Standarder: Denna produkt uppfyller följande standarder. Dessa produkter har säkerhetstestats av UL i enlighet med Standard 1950, av CSA i enlighet med CSA 950, och av TUV i enlighet med EN60950.
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Page 15: Table Of Contents
Overview ............1 AT-MR420T/AT-MR820T Faceplates ......1 Features . - Page 16 Technical Specifications ........27 The AT-MR420T/AT-MR820T Specifications......27 Physical .
- Page 17 Appendix E Where To Find Us ..........41 Appendix F Index .
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Page 19: About This Guide
This guide is written for system administrators who are responsible for configuring, monitoring, and maintaining a Local Area Network (LAN) of which Allied Telesyn’s multiport AT-MR420T and AT-MR820T Micro Repeaters are components. This guide serves as an installation guide and reference guide for both products. -
Page 20: Document Conventions
A note provides additional information or describes the possible consequence of a specific action you can perform. Contacting ATI Technical Support If you are having problems with your AT-MR420T/AT-MR820T, you can contact ATI’s Technical Support staff by: Telephone and Fax... -
Page 21: Internet Mail
AT-MR420T and AT-MR820T Installation Guide Internet Mail You can send electronic mail via the Internet to: tech_support@centre.com CompuServe Forum ATI has a forum on CompuServe. You can reach us by typing go allied at the CompuServe prompt (!). -
Page 23: Product Description
Ethernet media conversions and Local Area Network (LAN) applications. The AT-MR420T/AT-MR820T Micro Repeaters combine 10 Mbps Ethernet connectivity with the same features and functionality of larger, more expensive repeaters. At the same time, it supports full- length cable segments with the maximum number of supported devices allowed within IEEE 802.3 standards. - Page 24 Product Description Figure 1: AT-MR420T Front and Back Panels Figure 2: AT-MR820T Front and Back Panels...
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Page 25: Features
AT-MR420T and AT-MR820T Installation Guide Features The AT-MR420T/AT-MR820T Micro Repeaters have incorporated the latest technologies, including a custom Application Specific Integrated Circuit (ASIC) and Surface Mount Technology (SMT). These result in enhanced functionality, increased reliability, and improved performance. The AT-MR420T/AT-MR820T Micro Repeaters have the following features: IEEE 802.3 compliant... -
Page 26: Backbone Network Port
Product Description Jabber Lock-up Protection. Jabber lock-up protects the repeater from being overrun with data packets by isolating segments with transmitted packets that exceed the maximum packet length. That is, jabber lock-up automatically prevents transmitted data from reaching the repeater if the transmitted data time exceeds a specified duration (usually 5 ms). -
Page 27: Installation
Chapter 2 Installation Site Requirements Ventilation The AT-MR420T/AT-MR820T Micro Repeaters have grilled openings on both sides for ventilation. Although these micro repeaters do not require an internal fan, adequate ventilation is required. Note Make sure that the ventilation openings located on the sides of the chassis are never blocked. -
Page 28: Connections
Note Because of default switch positions, you do not have to change any switches. Connections The AT-MR420T/AT-MR820T Micro Repeaters have two types of ports: RJ45 (8 pin) AUI (15 pin) RJ45 Ports Attach an RJ45 10Base-T UTP cable to port 1. The respective segment... -
Page 29: Aui Network Port
AT-MR420T and AT-MR820T Installation Guide Attach a second 10Base-T UTP RJ45 connector to 10Base-T network port 2. The Port 2 LINK OK LED on the front panel should now light, provided the 10Base-T device on the opposite end of the UTP cable is operational. -
Page 30: Port Status Indicators
Installation Port Status Indicators Associated with each 10Base-T (RJ45) network port are the two Port status LEDs. These LEDs indicate whether the port is linked, receiving data, or both. See Figure 5. Note A data packet is too fast for the human eye to distinguish on an LED, therefore the LEDs will not reflect real-time activity. -
Page 31: Hub Status Indicators
AT-MR420T and AT-MR820T Installation Guide In general, Port status LEDs show the functionality of the port. If the LINK OK status light is green and the Receive status is flashing amber, a signal is being received and the segment attached to the port is functional. -
Page 32: System Check
4. Once the connection between devices attached to ports 1 and 2 has been successfully established, remove the RJ45 connector from port 2 and connect it to each of the subsequent AT-MR420T/AT-MR820T 10Base-T ports, 3 through 4/8, to verify their functions. - Page 33 AT-MR420T and AT-MR820T Installation Guide Note The LINK OK LED validates the receive pair only. The opposite end of the UTP segment is responsible for validating the transmit pair.
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Page 35: Connectivity
Chapter 3 Connectivity Three Media Connectors This repeater has three port types and associated connectors: AC power port 10Base 5 (AUI) network backbone port Four/Eight Unshielded Twisted Pair (UTP) 10Base-T (RJ45) ports AC Power Connector While it is common to use dedicated power circuits or power conditioners to supply power to network devices, the source must be able to provide AC power at 100-120/200-240 VAC and 60/50 Hz. - Page 36 Connectivity Figure 7: Power Connector...
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Page 37: Ethernet Network Specifications
AT-MR420T and AT-MR820T Installation Guide Ethernet Network Specifications Table 2 provides an overview of the IEEE 802.3 specifications for ethernet configurations using thick, thin, and twisted-pair wiring. Table 2: IEEE 802.3 Network Specifications 10Base-T 10Base2 10Base5 Media Unshielded Thin Coaxial... - Page 38 Connectivity Figure 8: AUI Network Port 10Base5 (Thick) Ethernet Cable. When configuring 10Base5 coax segments, IEEE 802.3 specifications allow a maximum of 100 MAU attachments, spaced at multiples of 2.5 meters (8.2 feet) measured accurately from the cable end (50 Ω terminator included). The 10Base5 cable segment should not exceed 500 meters (1,640 feet).
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Page 39: Utp (Rj45) Connector
AT-MR420T and AT-MR820T Installation Guide UTP (RJ45) Connector Figure 9 shows a UTP cable with RJ45 connectors. For a 10Base-T link between a repeater and a Medium Attachment Unit (MAU) or Network Interface Controller (NIC), the cable is wired straight through. - Page 40 Connectivity Hub to MAU Wiring. The most typical UTP cable for the AT-MR420T/ AT-MR820T Micro Repeaters is UTP Hub to UTP transceiver Data Terminal Equipment (DTE). To configure your own cables, see Appendix A, “Technical Specifications,”...
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Page 41: Topology
Figure 10 shows a standalone topology. Four workstations are connected directly to the repeater through the repeater’s RJ45 ports. Ethernet Coaxial Backbone AUI cable Transceiver 100 Meters maximum Category 3-5 UTP cable wired Pin to Pin Figure 10: AT-MR420T Standalone Topology... -
Page 42: Cascade Topology
Figure 11 shows a cascaded topology using four repeaters which is the maximum number of micro repeaters and nodes allowed in a single segment: four micro repeaters with ten (AT-MR420T) or twenty-six (AT-MR820T) ports. Its design complies with the four-repeater rule. -
Page 43: Backbone Networks
UTP cable wired Pin to Pin Figure 12: AT-MR420T Backbone Topology In a backbone network topology, each workgroup has its own local network and the backbone is used to link the various workgroups through the bridges. The advantages of a backbone network topology... -
Page 44: Mdi/Mdi-X Switch And Uplink Port
4/8 of the first unit to any port of a second unit. A maximum of four repeaters (the four repeater rule) can be interconnected. The network effectively consists of 6 nodes for the AT-MR420T and 14 nodes for the AT-MR820T. The Uplink port is located on the back panel, as shown in Figure 13. - Page 45 AT-MR420T and AT-MR820T The default setting for the RJ45 pinout switch is MDI-X (standard RJ45 port), which means the slide switch is to the right. In the default MDI-X configuration you can connect the 10Base-T port to a workstation or to any other DTE (that is, node).
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Page 46: 10Base5 Backbone
Topology 10Base5 Backbone Figure 14 illustrates a single multiport 10Base-T AT-MR420T/ AT-MR820T Micro Repeaters connecting to a thick Ethernet backbone using a transceiver. Ethernet Coaxial Backbone AUI cable Transceiver 100 Meters maximum Category 3-5 UTP cable wired Pin to Pin... -
Page 47: Fiber Optic Backbone
AT-MR420T and AT-MR820T Fiber Optic Backbone By attaching a fiber optic transceiver, the AUI port can connect your network to a fiber optic (10Base-FL/FOIRL) cable backbone. 100 Meters maximum Fiber Optic Category 3-5 Transceiver UTP cable wired Pin to Pin... -
Page 49: Technical Specifications
Appendix A Technical Specifications The AT-MR420T/AT-MR820T Specifications Physical Height 37.6 mm (1.55 in.) Width 332 mm (13 in.) Depth 112 mm (4.4 in.) Installation options Tabletop or rack-mount Electrical Input voltage 100-120 or 200-240 VAC Frequency 50 or 60 Hz... -
Page 50: Diagnostic Leds
Technical Specifications Diagnostic LEDs Individual port link status (4/8) Individual port receive activity (4/8) Hub status (3), specifying: Both Transmit and Receive activity Collision Power Certification Safety UL 1950, CSA 22.2 No. 950 (Canadian Standards Association), TUV EN60950 Emission FCC Part 15 Class A, VCCI Class 1, CDOC Class A, EN55022 (CISPR 22) Class A 10Base-T Pin Assignments... -
Page 51: Straight-Through Wiring
AT-MR420T and AT-MR820T Installation Guide Each twisted-pair link segment must have a male connector attached to both ends. According to the 10Base-T specification, pins 1 and 2 on the connector are used for transmitting data; pins 3 and 6 are used for receiving data. -
Page 52: 5 - 4 - 3 Rule
Technical Specifications 5 - 4 - 3 Rule In addition to the requirements outlined in Chapter 3, Table 2, follows the “5-4-3 rule” to ensure that your configuration does not exceed the maximum 10Base5 data transmission path (the longest path through any given network). -
Page 53: Glossary
Appendix B Glossary 10Base2—Also called thin Ethernet, thinnet or CheaperNet, a 10 MHz baseband specification. Cable impedance is 50 Ω and maximum coaxial segment length is 185 meters (606 ft.). 10Base5—Also called thick Ethernet, a 10 MHz baseband specification. Cable impedance is 50 Ω... - Page 54 Glossary medium (coax cable) for data packet transmission. It provides for a level of error detection should that transmission be corrupted or impeded by contention for the transmission medium. COAX SEGMENT—A segment of Ethernet cable that contains MAUs. COAXIAL CABLE—A two-conductor (center conductor, shield system), concentric, constant impedance transmission line used as the trunk medium in the baseband system.
- Page 55 AT-MR420T and AT-MR820T Installation Guide HUB/REPEATER—A hub is a central signal distributor. It is used in a wiring topology consisting of several point-to-point segments originating from a central point. The term hub is often used interchangeably with the term repeater. Multiport 10Base-T, 10Base2 and fiber optic (10Base-FL, FOIRL) repeaters are considered hubs.
- Page 56 Glossary MEDIUM ATTACHMENT UNIT (MAU)—In a LAN, a device used in a data station to couple the DTE to the transmission medium. MEDIUM DEPENDENT INTERFACE (MDI)—The mechanical and electrical interface between a hub and a transceiver (MAU). MDI-X is another version of the interface that enables hubs to connect using different pin-outs, thereby avoiding conflicts that occur when receiving and transmitting packets use the same pin-out.
- Page 57 AT-MR420T and AT-MR820T Installation Guide SQE TEST—Commonly referred to as Heartbeat, is a special 802.3 signal sent by the MAU to the DTE to test the collision detection function. Some DTE want SQE and others do not. Repeaters do not want the SQE Test.
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Page 59: Technical Support Fax Order
Appendix C Technical Support Fax Order Name___________________________________________________________ Company ________________________________________________________ Address _________________________________________________________ City ____________________ State/Province ____________________________ Zip/Postal Code _______________ Country ____________________________ Phone ___________________________ Fax ____________________________ Incident Summary Model number of Allied Telesyn product I am using ______________________ Network software products I am using (e.g., network managers)____________ _______________________________________________________________ Brief summary of problem __________________________________________ _______________________________________________________________... - Page 61 Appendix D CentreCOM AT-MR420T/AT-MR820T Installation Guide Feedback Please tell us what additional information you would like to see discussed in the guide. If there are topics you would like information on that were not covered in the guide, please photocopy this page, answer the questions and fax or mail this form back to Allied Telesyn International Corp.
- Page 63 Appendix E Where To Find Us For Technical Support or Service Location Phone Asia (+65) 3815-613 (+65) 3833-830 Singapore, Taiwan, Thailand, Malaysia, Indonesia, Korea, Philippines, China, India Australia (612) 416-0619 (612) 416-9764 Australia, New Zealand France (+33) 1-60-92-15-32 (+33) 1-69-28-37-49 France, Belgium, Luxembourg, The Netherlands, Middle East, Africa Germany...
- Page 64 Where To Find Us For Sales Information Australia San Diego, CA Tel: (619) 279-3899, Fax: (619) 279-3897 Lindfield, NSW Tel: (612) 416-0619, Fax: (612) 416-9764 Santa Ana, CA Tel: (714) 838-0434, Fax: (714) 838-9721 Canada Clearwater, FL Rexdale, Ontario Tel: (813) 726-0022, Fax: (813) 726-0234 Tel: (416) 675-6738, Fax: (416) 675-0057 Norcross, GA Richmond, British Columbia...
- Page 65 Appendix F Index Numerics 10Base-T features auto partitioning jabber lock-up protection application specific integrated circuit link integrity (ASIC) regeneration backbone hub status fiber optic power cabling indicators 10Base2 activity 10Base5 4, 7, 15 collision 10Base5 (thick) ethernet hub status 10Base-FL link 10Base-T link ok...
- Page 66 Index electrical overview environmental physical surface mount technology (SMT) pins switches 10Base-T pin assignments MDI/MDI-X ports AUI network technical support services backbone bulletin board backbone network compuserve 1, 4 network backbone compuserve forum RJ45 contacting RJ45 network electronic mail uplink internet mail 1, 6 xx, xxi...
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