Allied-telesis AT-MR820T Manual do Utilizador

CentreCOM AT-MR420TAT-MR820T Multiport Micro Repeaters Installation Guide PN 613-10624-00 Rev A ® MRx20T(UTP)Ver6_Book Page i Thursday, April 3, 19

x Sikkerhetsnormer: Dette produktet tilfredsstiller følgende sikkerhetsnormer. RFI stråling EN55022 Klasse AADVARSEL: Hvis dette produktet benyttes

xi Padrões: Este produto atende aos seguintes padrões. Emissão de interferência de radiofrequência EN55022 Classe AAVISO: Num ambiente doméstico est

xii Estándares: Este producto cumple con los siguientes estándares. Emisión RFI EN55022 Clase AADVERTENCIA: en un entorno doméstico, este producto

xiii Standarder: Denna produkt uppfyller följande standarder. Radiostörning EN55022 Klass AVARNING: Denna produkt kan ge upphov till radiostörningar

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xv Table of Contents Electrical Safety and Installation Requirements . . . . . . . . . . . . . . . . . .iii About This Guide . . . . . . . . . .

xvi Chapter 3Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Three Media Connecto

xvii Appendix EWhere To Find Us . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Appendix FIndex . .

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xix About This Guide This guide is written for system administrators who are responsible for configuring, monitoring, and maintaining a Local Area Ne

Copyright  1997 Allied Telesyn International Corp.All rights reserved. No part of this publication may be reproduced without prior written permissi

About This Guidexx Document Conventions The following conventions are used in presenting information in this guide: Note A note provides additional

AT-MR420T and AT-MR820T Installation Guidexxi Internet Mail You can send electronic mail via the Internet to: [email protected] CompuServe Foru

MRx20T(UTP)Ver6_Book Page xxii Thursday, April 3, 1997 5:18 PM

1Chapter 1Product DescriptionOverviewAllied Telesyn’s multiport AT-MR420T/AT-MR820T Micro Repeaters are a compact, inexpensive solution for all Ethern

Product Description2Figure 1: AT-MR420T Front and Back PanelsFigure 2: AT-MR820T Front and Back PanelsMRx20T(UTP)Ver6_Book Page 2 Thursday, April 3,

AT-MR420T and AT-MR820T Installation Guide3FeaturesThe AT-MR420T/AT-MR820T Micro Repeaters have incorporated the latest technologies, including a cust

Product Description4Jabber Lock-up Protection. Jabber lock-up protects the repeater from being overrun with data packets by isolating segments with tr

5Chapter 2InstallationSite RequirementsVentilationThe AT-MR420T/AT-MR820T Micro Repeaters have grilled openings on both sides for ventilation. Althoug

Installation61. Carefully unpack the repeater. Keep the packing materials until you have successfully installed the product.2. Place the repeater in a

AT-MR420T and AT-MR820T Installation Guide7Attach a second 10Base-T UTP RJ45 connector to 10Base-T network port 2. The Port 2 LINK OK LED on the front

iii Electrical Safety and Installation Requirements STANDARDS: This product meets the following standardsRFI Emission EN55022 Class AWARNING: In a d

Installation8Port Status IndicatorsAssociated with each 10Base-T (RJ45) network port are the two Port status LEDs. These LEDs indicate whether the por

AT-MR420T and AT-MR820T Installation Guide9In general, Port status LEDs show the functionality of the port. If the LINK OK status light is green and t

Installation101Occasional collisions are normal in Ethernet networks. A constantly lit Collision LED may indicate that there is a port with excessive

AT-MR420T and AT-MR820T Installation Guide11 NoteThe LINK OK LED validates the receive pair only. The opposite end of the UTP segment is responsible

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13Chapter 3ConnectivityThree Media ConnectorsThis repeater has three port types and associated connectors:❑ AC power port❑ 10Base 5 (AUI) network back

Connectivity14Figure 7: Power ConnectorMRx20T(UTP)Ver6_Book Page 14 Thursday, April 3, 1997 5:18 PM

AT-MR420T and AT-MR820T Installation Guide15Ethernet Network SpecificationsTable 2 provides an overview of the IEEE 802.3 specifications for ethernet

Connectivity16Figure 8: AUI Network Port10Base5 (Thick) Ethernet Cable. When configuring 10Base5 coax segments, IEEE 802.3 specifications allow a maxi

AT-MR420T and AT-MR820T Installation Guide17UTP (RJ45) ConnectorFigure 9 shows a UTP cable with RJ45 connectors. For a 10Base-T link between a repeate

iv INSTALLATION ELECTRICAL—AUTO VOLTAGE ADJUSTMENT This product will automatically adjust to any voltage between the ranges shown on the label. ELECT

Connectivity18Hub to MAU Wiring. The most typical UTP cable for the AT-MR420T/AT-MR820T Micro Repeaters is UTP Hub to UTP transceiver Data Terminal Eq

19Chapter 4TopologyStandalone TopologyFigure 10 shows a standalone topology. Four workstations are connected directly to the repeater through the repe

Topology20Cascade TopologyA shared Ethernet network can be expanded by interconnecting repeaters (cascading) through the UTP ports.Figure 11: AT-MR820

AT-MR420T and AT-MR820T21Backbone NetworksThe most straightforward topology is a backbone network. Figure 12 show a backbone network topology with the

Topology22MDI/MDI-X Switch and Uplink PortWhile any RJ45 port can be used to cascade repeaters, port 4/8 has been specifically designed with an uplink

AT-MR420T and AT-MR820T23The default setting for the RJ45 pinout switch is MDI-X (standard RJ45 port), which means the slide switch is to the right. ❑

Topology2410Base5 BackboneFigure 14 illustrates a single multiport 10Base-T AT-MR420T/AT-MR820T Micro Repeaters connecting to a thick Ethernet backbon

AT-MR420T and AT-MR820T25Fiber Optic BackboneBy attaching a fiber optic transceiver, the AUI port can connect your network to a fiber optic (10Base-FL

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27Appendix ATechnical SpecificationsThe AT-MR420T/AT-MR820T SpecificationsPhysicalHeight 37.6 mm (1.55 in.)Width 332 mm (13 in.)Depth 112 mm (4.4 in.)In

v 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

Technical Specifications28Diagnostic LEDsIndividual port link status (4/8)Individual port receive activity (4/8)Hub status (3), specifying:❑ Both Tran

AT-MR420T and AT-MR820T Installation Guide29Each twisted-pair link segment must have a male connector attached to both ends. According to the 10Base-T

Technical Specifications305 - 4 - 3 RuleIn addition to the requirements outlined in Chapter 3, Table 2, follows the “5-4-3 rule” to ensure that your c

31Appendix BGlossary 10Base2—Also called thin Ethernet, thinnet or CheaperNet, a 10 MHz baseband specification. Cable impedance is 50 Ω and maximum co

Glossary32medium (coax cable) for data packet transmission. It provides for a level of error detection should that transmission be corrupted or impede

AT-MR420T and AT-MR820T Installation Guide33HUB/REPEATER—A hub is a central signal distributor. It is used in a wiring topology consisting of several

Glossary34MEDIUM ATTACHMENT UNIT (MAU)—In a LAN, a device used in a data station to couple the DTE to the transmission medium.MEDIUM DEPENDENT INTERFA

AT-MR420T and AT-MR820T Installation Guide35SQE TEST—Commonly referred to as Heartbeat, is a special 802.3 signal sent by the MAU to the DTE to test t

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37Appendix CTechnical Support Fax OrderName___________________________________________________________Company_________________________________________

vi Ventilationsåbninger må ikke blokeres og skal have fri adgang til den omgivende luft i rummet for afkøling. BETJENINGSTEMPERATUR Dette apparat er

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39Appendix DCentreCOM AT-MR420T/AT-MR820T Installation Guide FeedbackPlease tell us what additional information you would like to see discussed in the

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41Appendix EWhere To Find UsFor Technical Support or ServiceLocation Phone FaxAsiaSingapore, Taiwan, Thailand, Malaysia, Indonesia, Korea, Philippines

Where To Find Us42AustraliaLindfield, NSWTel: (612) 416-0619, Fax: (612) 416-9764CanadaRexdale, OntarioTel: (416) 675-6738, Fax: (416) 675-0057Richmond

43Appendix FIndexNumerics10Base-T 15Aapplication specific integrated circuit (ASIC) 3Bbackbonefiber optic 25Ccabling10Base2 1510Base5 4, 7

44IndexOoverview 1Ppins10Base-T pin assignments 28portsAUI 15AUI network 7backbone 15backbone network 1, 4network backbone 13RJ45 6R

vii NORMES: ce produit est conforme aux normes de suivantes : Emission d’interférences radioélectriques EN55022 Classe AMISE EN GARDE: dans un enviro

viii Standardit: Tämä tuote on seuraavien standardien mukainen. Radioaaltojen häirintä EN55022 Luokka AVAROITUS: Kotiolosuhteissa tämä laite voi aih

ix Standard: Questo prodotto è conforme ai seguenti standard. Emissione RFI (interferenza di radiofrequenza) EN55022 Classe AAVVERTENZA: in ambient