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Allied Telesis AT-MR420TR, Руководство по установке

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Glossary

38

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.

COAXIAL CABLE SEGMENT—A length of coaxial cable sections and coaxial 
connectors, terminated at each end in its characteristic impedance.

COLLISION—An unwanted condition that results from concurrent 
transmissions on the physical medium.

COMPATIBILITY INTERFACE—The MDI coaxial cable interface and the 
AUI branch cable interface, the two points at which hardware compatibility is 
defined to allow connection of independently designed and manufactured 
components to the baseband transmission system.

CROSSOVER—Wiring used when connecting a 10Base-T MAU to another 
10Base-T MAU or a 10Base-T hub to another 10Base-T hub. For example, one 
10Base-T MAU has the TD (Transmitted Data) pair on the same pins as 
another 10Base-T MAU. If pins were wired straight, there would be two 
transmitters on one pair and no receiver. As a solution, the crossover cable 
crosses the TD pair with the RD (Ready Data) pair, to connect the TD pins on 
one end to the RD pins at the other end.

D-SUB CONNECTOR—The AUI cable uses 15-pin D-sub connectors. “D” 
refers to the shape of the connector shell. Also called miniature D, DB15, or DIX 
connectors.

DATA COMMUNICATION EQUIPMENT (DCE)—In RS-232 specification, 
a module, such as a modem, for connecting a DTE to other equipment. A 
repeater connected to a terminal or workstation for Omega management use is 
wired as a DCE.

DATA TERMINAL EQUIPMENT (DTE)—In RS-232 specification, a module 
typically at the end of a segment (i.e., uninterrupted length of Ethernet cable). 
The DTE could be an Ethernet workstation, repeater or bridge.

DIX CONNECTOR—See D-Sub Connector

HEARTBEAT—See Signal Quality Error

HOUSE WIRING—House wiring is the existing wiring inside a building. This 
wiring generally originates from one or more wiring closets, such as a telephone 
room. Some older buildings may have wiring unsuitable for 10 megabit data 
rates. In these circumstances, it is recommended that the wiring be tested with 
a 10Base-T signal/wire tester.

MRx20TR(STP/UTP)_BookA  Page 38  Thursday, April 3, 1997  5:24 PM

Содержание AT-MR420TR

Страница 1: ...CentreCOM AT MR420TR AT MR820TR Multiport Micro Repeaters Installation Guide PN 613 10625 00 Rev A...

Страница 2: ...d 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 Trademarks Ethernet is a r...

Страница 3: ...T disconnect the power cord 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...

Страница 4: ...EMPERATURE This product is designed for a maximum ambient temperature of 40 C ALL COUNTRIES Install product in accordance with local and National Electrical Codes NORMEN Dieses Produkt erf llt die Anf...

Страница 5: ...er Umgebungstemperatur von nicht mehr als 40 C entworfen ALLE L NDER Installation mu rtlichen und nationalen elektrischen Vorschriften entsprechen Radiofrekvens forstyrrelsesemission EN55022 Klasse A...

Страница 6: ...dit product radiostoring veroorzaken in welk geval de gebruiker verplicht kan worden om gepaste maatregelen te nemen Immuniteit EN50082 1 De veiligheid van deze produkten is door UL getest volgens no...

Страница 7: ...oduit peut provoquer des interf rences radio lectriques Auquel cas l utilisateur devra prendre les mesures ad quates Immunit EN50082 1 La s curit de ces mat riels a t test e par UL conform ment la nor...

Страница 8: ...sti ryhdytt v tarpeellisiin toimenpiteisiin Kest vyys EN50082 1 UL on turvatestannut n m tuotteet Standard 1950 mukaisesti CSA standardin CSA 950 mukaisesti ja TUV standardin EN60950 mukaisesti TURVAL...

Страница 9: ...SSE ELETTRICHE Per evitare SCOSSE ELETTRICHE non asportare il coperchio Le componenti interne non sono riparabili dall utente Questa unit ha TENSIONI PERICOLOSE e va aperta solamente da un tecnico spe...

Страница 10: ...gen deler som du kan bruke p innsiden Denne enheten inneholder FARLIGE SPENNING og m kun pnes av en oppl rt kvalifisert tekniker For unng muligheten av ELEKTRISK SJOKK m den elektriske str mmen til pr...

Страница 11: ...as que possam ser consertadas pelo usu rio Este aparelho cont m VOLTAGENS PERIGOSAS e s deve ser aberto por um t cnico qualificado e treinado Para evitar a possibilidade de CHOQUE EL TRICO desconecte...

Страница 12: ...AD AVISOS ELECTRICOS ADVERTENCIA PELIGRO DE ELECTROCHOQUE Para evitar un ELECTROCHOQUE no quite la tapa No hay ning n componente en el interior al cual puede prestar servicio el usuario Esta unidad co...

Страница 13: ...rd 1950 av CSA i enlighet med CSA 950 och av TUV i enlighet med EN60950 S KERHET TILLK NNAGIVANDEN BETR FFANDE ELEKTRICITETSRISK RISK F R ELEKTRISK ST T F r att undvika ELEKTRISK st t ta ej av locket...

Страница 14: ...sit p s s tt att fara inte uppst r p g a oj mn belastning VARNING Luftventilerna f r ej blockeras och m ste ha fri tillg ng till omgivande rumsluft f r avsvalning VARNING Ta ej bort gummif tterna fr n...

Страница 15: ...Chapter 1 Product Description 1 Overview 1 AT MR420TR Faceplates 1 Features 3 Backbone Network Port 4 10Base2 AUI Backbone Port Switches 5 Backbone Enable Switch 6 Media Select Switch 6 Chapter 2 Ins...

Страница 16: ...etworks 26 MDI MDI X Switch and Uplink Port 26 10Base5 Backbone 28 10Base2 Backbone 29 Fiber Optic Backbone 30 Appendix A Technical Specifications 31 The AT MR420TR AT MR820TR Specifications 31 Physic...

Страница 17: ...xvii Appendix D CentreCOM AT MR420TR AT MR820TR Guide Feedback 45 Appendix E Where To Find Us 47 Appendix F Index 49...

Страница 18: ......

Страница 19: ...ntional installation procedures connections and LED Status Indicators Chapter 3 Connectivity provides instructions associated with the four media connectors and ports Chapter 4 Topology describes upli...

Страница 20: ...l Support staff by Telephone Bulletin board services Electronic mail via the Internet CompuServe forum When you contact Technical Support you should have the following information available Serial num...

Страница 21: ...functions available This is followed by a list and description of all available technical notes and files that can be downloaded Internet Mail You can send electronic mail via the Internet to tech_su...

Страница 22: ......

Страница 23: ...m the AT MR820TR Micro Repeater in that the former has 4 Shielded Unshielded Twisted Pair STP UTP ports whereas the latter has 8 STP UTP ports You can use any one of the STP UTP ports for connection t...

Страница 24: ...ls Figure 2 AT MR420TR and AT MR820TR Rear Panels On the back panel are four eight STP UTP RJ45 network ports including Port 4 8 an uplink port as well as the 10Base5 and 10Base2 backbone network port...

Страница 25: ...detection and correction test link capability auto partitioning and jabber lock up protection status and diagnostic LEDs STP UTP uplink port supported for network cascading Packet Regeneration Packet...

Страница 26: ...se network ports are located on the back panel See Figure 3 Figure 3 Network Media Options These media alternatives are 10Base2 Bayonet Nut Couple BNC 10Base2 requires a thin coaxial cable RG58U which...

Страница 27: ...esyn 802 3 transceiver into this port for alternative media connections for example fiber optics Although both network ports are always available only one can be active at a time and since there is no...

Страница 28: ...witch is only active after the Backbone Enable switch is activated It functions as the name implies you have the ability to determine the medium of connectivity to the network backbone either the 10Ba...

Страница 29: ...cked Note Maximum ambient operating temperature is 104o F 40o C Power Be sure that the voltage and frequency is either 100 120 or 200 240 VAC and 60 or 50 Hz respectively Since there is no external po...

Страница 30: ...le for attachment 5 Attach your 10Base T STP UTP cables with RJ45 connectors to the 10Base T ports If the UPLINK port is not used for cascading you may connect a standard 10Base T cable to port 4 8 6...

Страница 31: ...nal then ensure that the proper cable is being used Attach a second 10Base T STP RJ45 connector to 10Base T network port 2 The port 2 LINK OK LED on the front panel should light provided the 10Base T...

Страница 32: ...k Load LEDs indicating the percentage of network utilization are located on the front panel Figure 5 shows these LEDs Figure 5 Network Load Indicators Port Status Indicators Two Port Status indicators...

Страница 33: ...l connection problem The device at the other end of the cable may be powered off the cable may be loose or disconnected or the cable has been wired incorrectly Check the crossover cable Green Steady I...

Страница 34: ...peater or the device connected to the port is faulty Move the cable to the adjacent ports to further isolate the problem to the repeater or to the attached device It may be necessary to change cables...

Страница 35: ...cessive port Continue this process until all 10Base T ports have been validated with good network connections 3 Establish a connection from a device connected to port 1 to a device connected to port 2...

Страница 36: ...Installation 14 Note The LINK LED validates the receive pair only The opposite end of the STP segment is responsible for validating the transmit pair...

Страница 37: ...n 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 VAC 0 5A and or 200 240VAC 0 25A and 60 50 Hz for Nort...

Страница 38: ...Connectivity 16 Figure 8 Power Connector...

Страница 39: ...le See Figure 9 Alternatively you can fit any of a variety of Allied Telesyn s 802 3 transceivers into this port should you select a different medium such as fiber optics Table 2 IEEE 802 3 Network Sp...

Страница 40: ...nt is 2165 ns Propagation delay of 10Base5 Ethernet coax is calculated at 4 33 ns meter Both ends of the segment must be terminated with a 50 termination with a power rating of 0 5 watts or greater Ea...

Страница 41: ...maximum segment length is 185 meters 606 ft 10Base2 Thin Ethernet When configuring thin coax segments IEEE 802 3 specifications allow 30 or fewer MAUs per cable segment spaced at no less than 0 5 met...

Страница 42: ...420TR AT MR820TR Micro Repeaters support full length fully repeated transmission and maximum node attachments which for the STP UTP link enables transmissions to 100 meters 328 ft A serious problem ex...

Страница 43: ...is typically untwisted and can cause problems Generally cable that is more or less round in section gives better results Hub to MAU Wiring The most typical TP cable for the AT MR420TR AT MR820TR Micro...

Страница 44: ......

Страница 45: ...an be expanded by interconnecting repeaters cascading through the UTP ports Figure 13 shows a cascaded topology using four repeaters which is the maximum number of micro repeaters and nodes in a singl...

Страница 46: ...of repeaters in the data path between any two nodes cannot exceed four BNC Terminator Switch The BNC Terminator switch is located on the rear panel to the left of the BNC connector Use this switch to...

Страница 47: ...ch must be disabled See Figure 14 ON enabled When installing a hub at the end of the cable if you need to remove the BNC T connector and the terminator the backbone port must be connected directly to...

Страница 48: ...a sub network does not affect other sub networks Since faults are isolated to a single sub network they are easier to locate MDI MDI X Switch and Uplink Port While any RJ45 port can be used to cascad...

Страница 49: ...facilitate this process it uses a Media Dependent Interface MDI MDI X switch An MDI MDI X switch is a crossover straight through cable selection slide switch As shown in Figure 16 the MDI MDI X switch...

Страница 50: ...traight through cable to another repeater or DTE and the Link LEDs on the respective units are not on change the position of the MDI MDI X switch to obtain continuity as indicated by active Link light...

Страница 51: ...maximum of 30 AT MR420TR AT MR820TR Micro Repeaters can be connected in a network using 10Base2 thin Ethernet When you use the BNC port you avoid using transceivers to complete the linkage See Figure...

Страница 52: ...ttenuation eliminates grounding problems secure from unauthorized taps 10Base FOIRL The IEEE FOIRL fiber optic inter repeater link standard limit of a fiber segment is 1 km The fiber optic cable that...

Страница 53: ...4 4 in Installation options Tabletop or rack mount Electrical Rating Input voltage 100 120 or 200 240 VAC Frequency 50 or 60 Hz Amperage 0 5 0 25 Amp Connector Ports 4 8 RJ45 Ethernet ports MDI X 1 AU...

Страница 54: ...on 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 An Ethernet twiste...

Страница 55: ...nt 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 as sho...

Страница 56: ...icate only if the transmitter on one unit is connected to the receiver on the other unit This reversal or crossover function can be implemented either in the wiring or in the device itself using the M...

Страница 57: ...devices or nodes PCs or other stations on the network There can be Up to five segments in series Up to four repeaters or multiport hubs Up to three populated segments that is segments attached to two...

Страница 58: ......

Страница 59: ...rkstation Includes a 15 pin D sub connector and sometimes a 15 conductor twisted pair cable Maximum length is 50 meters 164 ft BASEBAND COAXIAL SYSTEM A system whereby information is directly encoded...

Страница 60: ...ansmitted Data pair on the same pins as another 10Base T MAU If pins were wired straight there would be two transmitters on one pair and no receiver As a solution the crossover cable crosses the TD pa...

Страница 61: ...to describe the collision reinforcement signal output by the repeater to all ports The jam signal consists of 96 bits of alternating 1s and 0s The purpose is to extend a collision sufficiently so that...

Страница 62: ...ot be confused with the crossover cable PROPAGATION DELAY The time it takes a signal to travel from the input of a system component to the output Usually measured in nanoseconds IEEE 802 3 has specifi...

Страница 63: ...nnect to the same pins of another connector For example pin 1 of one connector connects to pin 1 of another connector THICK ETHERNET See 10Base5 THIN ETHERNET See 10Base2 TRUNK CABLE The coaxial cable...

Страница 64: ......

Страница 65: ...______________________________ Conditions List the steps that led up to the problem ___________________________ ______________________________________________________________________ _________________...

Страница 66: ......

Страница 67: ..._____________________________________________________________________ I would like the following more developed _____________________________________ __________________________________________________...

Страница 68: ......

Страница 69: ...Greece Turkey Israel 39 2 416047 39 2 419282 Japan 81 3 3443 5640 81 3 3443 2443 North America United States Canada Mexico Central America South America 1 800 428 4835 1 206 481 3790 United Kingdom Un...

Страница 70: ...Scottsdale AZ Tel 602 423 7087 Fax 602 423 7088 Los Angeles CA Tel 310 412 8684 Fax 310 412 8685 Mission Viejo CA Tel 714 699 0628 Fax 714 699 0276 For Sales Information San Diego CA Tel 619 279 3899...

Страница 71: ...4 straight through 33 voice quality 20 connections 9 connectivity 15 connectors power 15 RG58U 19 UTP RJ45 20 D data terminal equipment 12 E external transceiver 8 F features 3 auto partitioning 3 jab...

Страница 72: ...work 17 certification 32 connector ports 31 diagnostic LEDs 32 electrical 31 environmental 31 physical 31 surface mount technology SMT 3 switches backbone enable 5 6 BNC terminator 24 MDI MDI X 27 med...

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