Allied-telesis AT-MR820TR Manuale Utente

CentreCOM AT-MR420TRAT-MR820TR Multiport Micro Repeaters Installation Guide PN 613-10625-00 Rev A ® MRx20TR(STP/UTP)_BookA Page i Thursday, April 3

x ISTRUZIONI PER IL MONTAGGIOATTENZIONE : questi modelli sono concepiti per il funzionamento in posizione ORIZZONTALE. NON È POSSIBILE EFFETTUARE IL

xi FORSIKTIG: MEKANISK LASTNING Installering av utstyret på hyllen må utføres på slik måte at ingen farlige situasjoner oppstår som en følge av uj

xiiINSTRUÇÕES DE INSTALAÇÃOCUIDADO: Este modelos foram projetados para funcionar na posição HORIZONTAL. NÃO DEVE SER EFETUADA INSTALAÇÃO VERTICAL sem

xiiiINSTRUCCIONES DE MONTAJEATENCION: Estos modelos están diseñados para operar en posición HORIZONTAL. NO SE DEBEN MONTAR VERTICALMENTE sin el uso

xivMONTERINGSINSTRUKTIONERVARNING: Dessa modeller är konstruerade för användning i HORISONTALLÄGE. VERTIKALMONTERING får EJ UTFÖRAS utan att ett Allie

xvTable of ContentsElectrical Safety and Installation Requirements . . . . . . . . . . . . . . . . . .iiiAbout This Guide . . . . . . . . . . . . .

xviChapter 3Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Four Media Connectors.

xviiAppendix DCentreCOM AT-MR420TR/AT-MR820TR Guide Feedback . . . . . . . . . 45Appendix EWhere To Find Us . . . . . . . . . . . . . . . . . . . .

MRx20TR(STP/UTP)_BookA Page xviii Thursday, April 3, 1997 5:24 PM

xixAbout This GuideThis guide is written for system administrators who are responsible for configuring, monitoring, and maintaining a Local Area Netwo

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

About This GuidexxDocument ConventionsThe following conventions are used in presenting information in this guide: NoteA note provides additional info

AT-MR420TR and AT-MR820TR Installation GuidexxiThe process is straightforward: Once the BBS is accessed, it requests that you register either as a new

MRx20TR(STP/UTP)_BookA Page xxii Thursday, April 3, 1997 5:24 PM

1Chapter 1Product DescriptionOverviewAllied Telesyn’s multiport AT-MR420TR/AT-MR820TR Micro Repeaters represent a compact, inexpensive solution for Lo

Product Description2Figure 1: AT-MR420TR and AT-MR820TR Front PanelsFigure 2: AT-MR420TR and AT-MR820TR Rear PanelsOn the back panel are four/eight ST

AT-MR420TR and AT-MR820TR Installation Guide3FeaturesThe AT-MR420TR/AT-MR820TR Micro Repeaters have incorporated the latest technologies, including a

Product Description4jabber lock-up automatically prevents transmitted data from reaching the repeater if the transmitted data time exceeds a specified

AT-MR420TR and AT-MR820TR Installation Guide5❑ 10Base5 (Attachment Unit Interface [AUI])— Located to the right of the BNC port, the 10Base5 network po

Product Description6Backbone Enable SwitchThis dual-position switch allows you to activate the backbone network AUI and BNC ports. When this switch i

7Chapter 2InstallationSite RequirementsVentilationAT-MR420TR/AT-MR820TR Micro Repeaters have grilled openings on both sides for ventilation. Although

iii Electrical Safety and Installation Requirements STANDARDS: This product meets the following standards RFI Emission : EN55022 Class A WARNING:

Installation8Quick Installation 1. Carefully remove the AT-MR420TR/AT-MR820TR Micro Repeaters from their packaging materials. Keep the packing materia

AT-MR420TR and AT-MR820TR Installation Guide9ConnectionsThe AT-MR420TR/AT-MR820TR Micro Repeaters have the following connectors:❑ RJ45❑ AUI❑ BNCRJ45 P

Installation10LED Status IndicatorsThe front panel indicators are grouped into the following categories:❑ Network Load❑ Port Status❑ Hub StatusNetwork

AT-MR420TR and AT-MR820TR Installation Guide11 NoteA data packet is too fast for the human eye to distinguish on an LED, therefore the LEDs will not

Installation12If there is no link light, there is no signal continuity.Check that the attached Data Terminal Equipment (DTE) is ON and that the proper

AT-MR420TR and AT-MR820TR Installation Guide131 Occasional collisions are normal in Ethernet networks. A constantly illuminated Collision LED may indi

Installation14 NoteThe LINK LED validates the receive pair only. The opposite end of the STP segment is responsible for validating the transmit pair.

15Chapter 3ConnectivityFour Media ConnectorsThis repeater has four types of ports and media connectors:❑ AC input power connector❑ 10Base5 (AUI) netwo

Connectivity16Figure 8: Power ConnectorMRx20TR(STP/UTP)_BookA Page 16 Thursday, April 3, 1997 5:24 PM

AT-MR420TR and AT-MR820TR Installation Guide1710Base-T Network SpecificationsTable 2 provides an overview of the IEEE 802.3 specifications for 10Base-

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

Connectivity18Figure 9: AUI Network Port10Base5 (Thick) Ethernet Cable. When configuring 10Base5 coax segments, IEEE 802.3 specifications allow a maxi

AT-MR420TR and AT-MR820TR Installation Guide195.13 ns/meter. This cable internally consists of four shielded twisted pair wires with an overall shield

Connectivity20Twisted Pair (RJ45) ConnectorFigure 11 shows a twisted pair cable with RJ45 connectors. For a 10Base-T link between a repeater and a Med

AT-MR420TR and AT-MR820TR Installation Guide2110Base-T connections require Category 3, 4, or 5. In most cases, if a cable type is flat, it is typicall

MRx20TR(STP/UTP)_BookA Page 22 Thursday, April 3, 1997 5:24 PM

23Chapter 4TopologyStandalone TopologyFigure 12 shows a standalone topology. Four workstations are connected directly to the repeater through the repe

Topology24Figure 13: AT-MR820TR Four Cascaded RepeatersThe Four-Repeater Rule. The IEEE 802.3 standard provides general rules for 10Base-T cable leng

AT-MR420TR and AT-MR820TR Installation Guide25the termination switch. Figure 14 shows the location of the two-position 50 Ω Terminator switch. The swi

Topology26Backbone NetworksThe most straightforward topology is a backbone network. Figure 15 show a backbone network topology with the AUI port attac

AT-MR420TR and AT-MR820TR Installation Guide27second unit. A maximum of four repeaters (the four repeater rule) can be interconnected. The network eff

v KLASSE 1 GERÄTE DIESE GERÄTE MÜSSEN GEERDET SEIN. Der Netzstecker darf nur mit einer vorschriftsmäßig geerdeten Steckdose verbunden werden. Ein unv

Topology28❑ In the MDI configuration — the slide switch is to the left — you can connect the 10Base-T port to another 10Base-T internal crossover port

AT-MR420TR and AT-MR820TR Installation Guide2910Base2 BackboneA maximum of 30 AT-MR420TR/AT-MR820TR Micro Repeaters can be connected in a network usin

Topology30Fiber Optic BackboneBy attaching a fiber optic transceiver, the AUI port can connect your network to a fiber optic (10Base-FL/FOIRL) cable b

31Appendix ATechnical SpecificationsThe AT-MR420TR/AT-MR820TR SpecificationsPhysicalHeight 37.6 mm (1.55 in.)Width 332 mm (13 in.)Depth 112 mm (4.4 in.)

Technical Specifications32Diagnostic LEDsIndividual port link status (4/8)Individual port receive activity (4/8)Hub status (3), specifying:❑ Both Tran

AT-MR420TR and AT-MR820TR Installation Guide33ConnectorsNotice how the pins are numbered in Figure 20. Be sure to hold the connectors in the same orie

Technical Specifications34Straight-through WiringIf the twisted-pair link segment is to join two ports on a switch, and only one of the ports has an i

AT-MR420TR and AT-MR820TR Installation Guide355 - 4 - 3 RuleIn addition to the requirements outlined in Chapter 3, Table 2, follow the “5-4-3 rule” to

MRx20TR(STP/UTP)_BookA Page 36 Thursday, April 3, 1997 5:24 PM

37Appendix BGlossary10Base2—Also called thin Ethernet, thinnet or CheaperNet, a 10 MHz baseband specification. Cable impedance is 50 Ω and maximum coa

vi ELEKTRISK—KLASSE 1-UDSTYR DETTE UDSTYR KRÆVER JORDFORBINDELSE. Stikket skal være forbundet med en korrekt installeret jordforbunden stikkontakt.

Glossary38medium (coax cable) for data packet transmission. It provides for a level of error detection should that transmission be corrupted or impede

AT-MR420TR and AT-MR820TR Installation Guide39HUB/REPEATER—A hub is a central signal distributor. It is used in a wiring topology consisting of severa

Glossary40MEDIUM 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-MR420TR and AT-MR820TR Installation Guide41SQE TEST—Commonly referred to as Heartbeat, is a special 802.3 signal sent by the MAU to the DTE to test

MRx20TR(STP/UTP)_BookA Page 42 Thursday, April 3, 1997 5:24 PM

43Appendix CTechnical Support Fax OrderName__________________________________________________________________Company _________________________________

MRx20TR(STP/UTP)_BookA Page 44 Thursday, April 3, 1997 5:24 PM

45Appendix DCentreCOM AT-MR420TR/AT-MR820TR Guide FeedbackPlease tell us what additional information you would like to see discussed in the guide. If

MRx20TR(STP/UTP)_BookA Page 46 Thursday, April 3, 1997 5:24 PM

47Appendix EWhere To Find UsFor Technical Support or ServiceLocation Phone FaxAsiaSingapore, Taiwan, Thailand, Malaysia, Indonesia, Korea, Philippines

vii ELEKTRISCHE —SNOERENGebruik een elektrisch snoer, maximum 4,5 meter lang, berekend voor ten minste 6 ampère, 250 V, uit HAR vervaardigd, met aan

Where To Find Us48AustraliaLindfield, NSWTel: (612) 416-0619, Fax: (612) 416-9764CanadaRexdale, OntarioTel: (416) 675-6738, Fax: (416) 675-0057Richmond

49Appendix FIndexNumerics50 Ω terminator switch 4, 6802.3 transceiver 5Aambient temperature 7application specific integrated circuit(ASIC) 3Bb

50Index10Base2/AUI backbone switches 5AUI 17AUI network 9backbone 17backbone network 4BNC 19BNC network 9network backbone 15RJ45 9up

viii ELECTRICITE —INFORMATION SUR LE CORDONUtiliser un cordon secteur de 4,5 mètres de long maximum, calibré à 6 ampères minimum, 250V, et fabriqué e

ix ASENNUSSOHJEETHUOMAUTUS : Nämä mallit on suunniteltu käytettäviksi VAAKA-asennossa. PYSTYASENNUSTA EI SAA TEHDÄ ilman Allied Telesyn -pystykiinnit