Allied Telesyn User Manual
Contents
1. 1 Table 2 CentreCOM Micro Repeater Dimensions 2 Table 3 Usable and Unusable Twisted Pair Cable 18 Table 4 MDI MDI X Switch Settings for Common Connection 20 xii Chapter 1 Overview CentreCOM Fiber Optic to 10BASE T Micro Repeaters TheAT MR 118F T and AT MR 128F T are fiber optic to U nshielded Twisted Pair UTP microrepeaters TheAT MR 118F T has an external power supply while the AT MR 128F T has an internal power supply Both of these repeaters are two port media converters designed for connections to a F Optic 10B A SE F L or Fiber Optic I nter R epeater Link F OIR L segment and a UTP 10BASE T segment Table 1 lists the product line Table 1 The AT MR118FT and AT MR128FT Characteristics Model Power Supply Port 1 Port 2 AT MR118FT 11 21 External UTP SMA Fiber Optic AT MR118FT 13 23 External UTP ST Fiber Optic AT MR128FT 11 21 Internal UTP SMA Fiber Optic AT MR128FT 13 23 Internal UTP ST Fiber Optic R epeaters are used for two principal reasons They are A To extend a signal beyond its normal length of transmission A To complete a network connection in instances when one cannot be made Segments on either side of both repeaters support full length fully repeated transmission Only the fiber optic segment supports both full and half repeated transmission B oth2. DATA TERMINAL EQUIPMENT DTE n R 5232 specification a unit typically at the end of a segment The DTE could be an E thernet workstation repeater or bridge 26 CentreCOM Micro Repeaters DEPARTMENT CONCENTRATOR which provides a large number of workstation connections The term department concentrator refers to multiple repeaters housed in an AT 36C8 chassis See H ub R epeater Repeater DIX CONNECTOR See D Sub Connector FOIRL A fiber optic standard that allows up to 1 000 meters 3 280 ft of multimode duplex fiber optic cable in a point to point link HARMONICA ADAPTER This adapter provides a simple way to convert the 50 Telco connection to RJ 45 connections HEARTBEAT See SQE HUB to HUB WIRING See Hub to MAU Wiring HUB to MAU WIRING UTP cables for 10BASE T hub to MAU or Network Interface Controller NIC cards are wired straight through An RJ 45 receptacle at the hub would wire pin to pin to the RJ 45 receptacle at the MAU 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 10 SE T 10BASE 2 and fiber optic 10BA SE F L F OIR L repeaters are considered hubs See R epeater HOUSE WIRING ouse wiring is the existing wiring inside a building This wiring generally originates from one or
3. U S F ederal Communications N ote This equipment has been tested and found to comply with the limits for a Class digital device pursuant to 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 T his equipment generates uses and can radiate radio frequency and if not installed and used in accordance with 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 N ote M odifications or changes not expressly approved of by the manufacturer or theF CC can void your right to operate this equipment Canadian Department of Communications This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus as set out in the radio interference regulations of the Canadian Department of Communications Lepr sent appariel num rique n met pas de bruits radio lectriques d passant les limites appicables aux appariels num riques de Classe A Prescrites dans le r glement sur le brouillage radio lectrique edicte par le minest re des Communications Du Canada SAFETY WARNING ELECTRICAL NOTICES ELECTRIC SHOCK HAZARD Toprevent EL E CTRIC shock do not remove cover N o user serviceable
4. Connect the power connector from the A C power adapter to the micro repeater The Power indicator should illuminate Internal Power Supply Micro Repeaters TheAT MR128FT has an internal universal AC input DC output power supply L ocate the 100 120 200 240 V AC 50 60 H z power outlet and plug in the standard equipment power cord The power cord is only supplied in the U S A version the power plug into the micro repeater The Power indicator should illuminate Chapter 2 Cabling Two types of cabling exist for the AT MR118F T and AT MR 128F T They are A UTP 10BASE T Fiber Optic LOBASE FL FOIRL The 10BASE T cabling type is UTP while 10BASE FL and F OIRL is fiber optic with FL covering a greater distance than F OIRL Both cabling types have I EEE 802 3 specifications and limits associated with them They are described in the following sections I f you need detailed information on cabling see Appendix A For more information read the I E E E 802 3 specification where cabling regulations are outlined 10BASE T UTP Connections The micro repeater s U TP connections support a full 100 meters 328 ft of UTP cable per the 10B A SE T specification This twisted pair segment connects directly to either a Data Terminal E quipment DTE or transceiver The RJ 45 connector may be plugged directly tothe UTP port The cable should be at least Level 3UTP 100 Q impedance 22 to 26 A merican Wire Gauge AWG a minimum of
5. cross over UTP wiring 26 28 CSMA CD 26 D Data Terminal Equipment DTE 5 DCE 26 department concentrator 27 dimensions AT MR118FT 2 AT MR128FT 2 DTE 22 26 35 Index E Ethernet 1 5 7 22 F fiber optic 2 5 6 9 duplex cable 6 H harmonica adapter 27 heartbeat 27 house wiring 27 hub 27 hub repeater 27 impedance 5 27 indicators Collision 1 Link 1 On Line 1 Power 1 3 Receive 1 Transmit 1 J jabber 27 jam 27 jitter 27 L link segment 27 link test 28 M management agent management agent 28 MAU 23 28 MDI 7 28 MDI X 7 9 Media Access Unit MAU 2 Media Dependent Interface M DI 9 Media Dependent Interface cross over MDI X 9 36 P Packet Retiming Controller PRC 2 patch panel 28 PLS 28 PMA 28 polarity correction 28 power requirements 3 external power supply 1 2 3 internal power supply 1 3 PRC 3 propagation delay 29 punch down block 29 R receiving receiving pin RD 9 repeater 27 29 full repeater half repeater switch 2 setting up 8 repeater full full repeater mode 2 9 repeater half half repeater mode 2 9 S SQE 27 29 SQE Test 29 straight through UTP wiring 27 Surface Mount Technology SMT 1 switches 9 cross over 7 9 full repeater 7 9 half repeater 7 9 straight through 7 9 T transmitting transmitting pin TD 9 U UTP 2 3 8 9 29 Unshielded Twisted Pair UTP 1 wiring 1 3 5 6 8 9 23 10BASE2 25 10BASE 5 25 10BASE T
6. PAIR UTP A cable used in 10BASE T wiring that consists of at least two twisted pairs of 22 to 26 AWG wire The pairs should have at least 3twists per foot and have an impedance of 100 O L evel 3 and L evel 4UTP cable generally fits these criteria 29 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 am using Brief summary of problem Conditions List the steps that led up to the problem Detailed description Please use separate sheet Technical Support Fax Numbers Asia 65 383 2079 Singapore Taiwan Thailand Malaysia Indonesia Korea Hong Kong Philippines China India France 33 1 69 28 37 49 France Belgium Luxembourg Holland Italy Spain Australia New Zealand Greece Middle East Africa South America Germany 49 30 435 70 650 Germany Switzerland Austria Eastern Europe North America 206 481 3790 United States Canada Mexico United Kingdom 44 1 865 390 002 United Kingdom Denmark Norway Sweden Finland Iceland 31 Appendix D CentreCOM AT MR118FT and AT MR128FT Manual Feedback Please tell us what additional information you would like to see discussed in the manual If there are topics you would like information on that were not covered in the manual please photocopy this page
7. and AT MR 128F T allows for an easy installation Both the SMA and ST connections are industry standard interfaces Caution Make sure the fiber optic cable connector is not forced into the ST AN receptacle The ST connector is keyed Gently rotate the connector plug until the key slips into the notch of the fiber optic receptacle Chapter 3 Operation TheAT MR 118F T and AT MR 128F T repeaters both retime and regenerate the E thernet signal symmetry and regenerate the packet preamble The micro repeaters also count the number of consecutive collisions I f this number reaches 32 then the repeater will take the segment Off L ine partition to prevent a total network failure This process is known as automatic segmentation I f one valid E thernet packet is received on that segment the repeater will place the segment On L ine automatically thus disconnecting problem segments and reconnecting valid segments Switches TheAT MR 118F T and AT MR 128F T repeaters each havetwo switches They are A A full repeater half repeater switch Q A straight through cross over selection switch MDI MDI X The full repeater half repeater selection switch is used to select the half or full repeater functions The strai ght through cross over selection switch enables and disables the internal cross over function It indicates whether straight through MDI or cross over MDI X connections are being enabled Indicators The following diagnostic indi
8. de 4 5 metros com uma capacidade m nima de 6 amp e 250V fabricado de material para cabo HAR com conector moldado E 320 em uma extremidade e na outra extremidade um plugue aprovado para uso no pa s em quest o CUIDADO As entradas de ar n o devem ser bloqueadas e devem ter acesso livre ao ar ambiente para arrefecimento adequado do aparelho TEMPERATURA DE FUNCIONAMENTO E ste produto foi projetado para uma temperatura ambiente m xima de 50 graus cent grados TODOS OS PA SES nstale o produto de acordo com as normas federais e locais para instalac es el tricas ENERGIA RADIADA Este producto comercial ha sido probado y cumple con las normas requeridas en los EE UU para un dispositivo de Clase A SEGURIDAD AVISOS ELECTRICOS ADVERTENCIA PELIGRO DE ELECTROCHOQUE Para evitar un ELE CTROCHOQUE no quite la tapa N o hay ning n componente en el interior al cual puede prestar servicio el usuario E sta unidad contiene VOLTAJES PELIGROSOS y s lo deber abrirla un t cnico entrenado y calificado Para evitar la posibilidad de E LE CTR OCH OQU E desconecte la corriente el ctrica que llega al producto antes de conectar o desconectar los cables LAN PELIGRO DE RAYOS PELIGRO NOREALICE NINGUN TIPO DE TRABAJO CONEXION en los equipos oen LOS CABLES durante TORMENTAS DE RAYOS ATENCION EL CABLE DE ALIMENTACION SE USA COMOUN DISPOSITIVO DE DESCONEXION PARA DESACTIVAR EL EQUIPO desconecte el cable de alimentaci n INSTALA
9. equipment gt If you have throughput problems 1 Check to see if your full repeater half repeater selection switch is set to the half repeater mode H alf repeater mode may generate a high number of Cyclic R edundancy Check CR C or alignment errors which can slow your network throughput The source of these errors may be bit jitter which is the fluctuation of data packets in respect to a standard clock cycle 2 Tocorrect throughput problems try changing the full repeater half repeater switch setting from half repeater mode to full repeater mode you have exceeded the four repeater limit change the switch setting Note 0 If by changing the switch setting to full repeater mode you find that B back to half repeater mode 3 If the data errors are reduced you may need to reconfigure your network Appendix A Data Cabling Techniques The following sections detail cabling techniques and port specifications for E E E 802 3 media F or comprehensive treatment of these topics refer to the original IEEE specification 10BASE T A serious problem exists concerning identification of modular cable There are various grades of voice quality and data quality cables available These can appear to be similar externally although their high speed data transmission characteristics are radically different The identification problem is exaggerated by the fact that some suppliers have sold purportedly data quality cables manuf
10. find the half repeater mode creates throughput problems change the position of the switch to FULL to initiate full repeater mode 5 Use either a cross over or straight through cable to connect your AT MR 128F T tothe AUI UTP hub UTP port If you are using cross over cable change the position of the straight through cross over selection switch on the AT MR 128F T to MDI X sothat the repeater hub connection can occur gt When you perform system check To make sure your AT MR 118F T and AT MR 128F T micro repeaters are operating properly perform the following steps 1 Apply the proper power connection 2 Check that the Power indicator is illuminated 3 Connect a SE T UTP cable from the other device to the RJ 45 connector and check that the L ink indicator illuminates If it does not illuminate change the MDI MDI X switch and see if the L ink indicator illuminates 4 Connect a fiber optic cable to the fiber optic connectors and check that the L ink indicator illuminates 5 Transmit data through the micro repeater and check that the R eceive and Transmit indicators illuminate Chapter 4 Configuration The configuration in F igure 3 demonstrates how the AT MR 118F T and AT MR 128F T can be used to link two networks I n this scenario two buildings are linked by fiber optic cabling and the signals are distributed by UTP T his technique takes advantage of the stronger fiber optic signal and the less expens
11. parts inside T his unit contains HAZARDOUS VOLTAGE S and should only be opened by a trained and qualified technician To avoid the possibility of ELECTRIC SHOCK disconnect electric power tothe product before connecting or disconnecting the LAN cables LIGHTNING DANGER DANGER DO NOT WORK on equipment or CABLE S during periods of LIGHTNING ACTIVITY CAUTION POWER CORD ISUSED ASA DISCONNECTION DEVICE TO DE ENERGISE EQUIPMENT disconnect the power cord INSTALLATION ELECTRICAL AUTO VOLTAGE ADJ USTMENT This product will automatically adjust to any voltage between the ranges shown on the label ELECTRICAL TYPE CLASS 1EQUIPMENT THISEQUIPMENT MUST BE EARTHED Power plug must be connected to a properly wired earth ground socket outlet A n improperly wired socket outlet could place hazardous voltages on accessible metal parts ELECTRICAL CORD NOTICE Use power cord maximum 4 5 meters long rated 6 amp minimum 250V made of HAR cordage molded E C 320 connector on one end and on the other end a plug approved by the country of end use CAUTION Air vents must not be blocked and must have free access to the room ambient air for cooling Operating temperature This product is designed for a maximum ambient temperature of 50 C All Countries nstall product in accordance with local and N ational E lectrical Codes gt SICHERHEIT ACHTUNG GEFAHRLICHE SPANNUNG Das Geh use nicht ffnen Das Ger t enth lt keine vom B
12. three twists per foot and should not exceed 100 meters 328 ft in length costs Much of the existing cabling is not suitable for Ethernet 10 Mb 5 data rates Care must be taken to ensure the UTP wiring used for 10 5 is able to carry these E thernet data rates before a 10BASE T network solution is implemented U nlike the coaxial Ethernet 10BASE 2 and 10BASE 5architectures the 10BASE T UTP protocol is point to point wiring F or more detailed information on 10 5 see Appendix Not 10 5 UTP media was implemented to reduce E thernet wiring ote Cabling FOIRL or 10BASE FL Fiber Optic Connections Warning Hazardous light emissions may exist in fiber optic systems Severe eye damage may result if precautions are not taken N ever look into a transmitting fiber optic device transceiver repeater or cable ThelEEE 802 3 10BASE FL port supports up to 2 000 meters 6 560 ft of multimode duplex fiber optic cable in a point to point link which directly attaches two devices Duplex refers to support for fiber optic cable pairs enabling a two cable fiber optic connection with transmit mode dedicated to one cable and receive mode on the other 10 SE F L supports connections of 2 000 meters 6 560 ft while F OIRL supports connections of 1 000 meters 3 280 ft FL is compatible with FOIRL but restricts distance to 1 km The wide dynamic range of the fiber optic interface on the AT MR 118F T
13. 25 AUI drop specification 22 branch cable 25 CheaperN et 25 Index cross over UTP 26 28 drop cable 25 fiber optic 1 9 house wiring 27 hub to MAU UTP 27 MAU toMAU UTP 26 28 patch panel 28 straight through UTP 27 thick Ethernet 25 29 thinnet 25 29 trunk cable 29 UTP 25 37
14. Allied Telesyn CentreCOM AT MR118F AT MR 128F T Micro Repeaters User Manual Copyright 1994 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 T he information provided herein is subject to change without notice n no event shall Allied Telesyn nternational 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 Trademarks CentreCOM is a registered trademark of Allied Telesyn International Corp Ethernet is aregistered trademark of X erox Corporation UNIX is a registered trademark of UNIX System L aboratories N ovell and N etWare are registered trademarks of N ovell Inc Microsoft and MS DOS are registered trademarks and LAN Manager and Windows for Workgroups are trademarks of Microsoft Corporation 3Com is a registered trademark of 3Com PC NFS isatrademark of Sun Microsystems Inc PC TCP isaregistered trademark of FTP Software Inc gt RADIATED ENERGY
15. CION ELECTRICO AUTO AJ USTE DE TENSION E ste producto se ajustar autom ticamente a cualquier tensi n entre los valores m ximos y m nimos indicados en la etiqueta ELECTRICO EQUIPO DEL TIPO CLASE 1 ESTE EQUIPOTIENE QUE TENER CONEXION A TIERRA El cable tiene que conectarse a un enchufe con tierra debidamente instalado U n enchufe que no est correctamente instalado podr a ocasionar tensiones peligrosas en las partes met licas est n expuestas ELECTRICO ADVERTENCIA SOBRE EL CABLE U se un cable el ctrico con un m ximo de 4 5 metros de largo con una capacidad m nima de 6 amperios 250 V hecho de cable H AR con el conector moldeado E C 320 en un extremo y con un enchufe que est aprobado por el pa s de uso final en el otro ATENCION Las aberturas para ventilaci n no deber n bloquearse y deber n tener acceso libre al aire ambiental de la sala para su enfriamiento TEMPERATURA REQUERIDA PARA LA OPERACI N E ste producto est disefiado para una temperatura ambiental m xima de 50 grados C PARA TODOS LOS PA SES Monte el producto de acuerdo con los C digos E l ctricos locales y nacionales ENERGIUTSTR LNING Denna handelsprodukt har testats och befunnits vara i enlighet med U S A s krav f r klass A utrustning SAKERHET TILLKANNAGIVANDEN BETRAFFANDE ELEKTRICITETSRISK RISK FOR ELEKTRISK STOT F r att undvika ELEKTRISK st t ta ej av locket Det finns inga delar inuti som beh ver underh lla
16. DI RE LA CORRENTE AL DISPOSITIVO staccare il INSTALLAZIONE ELETTRICITA REGOLAZIONE AUTOMATICA DELLA TENSIONE Questo prodotto regoler automaticamente la tensione ad un valore compreso nella gamma indicata sull etichetta ELETTRICITA DISPOSITIVI DI CLASSE 1 QUESTODISPOSITIVO DEVE AVERE LA MESSA A TERRA Laspina deve essere inserita in una presa di corrente specificamente dotata di messa a terra U na presa non cablata in maniera corretta rischia di scaricare una tensione pericolosa su parti metalliche accessibili ELETTRICITA AVVERTENZA SUL CAVO U sare un cavo della lunghezza massima di metri 4 5 con capacit minima di 6 250 V di filo HAR dotato di connettore stampato I E C 320 ad un estremit e di spina approvata dal paese di destinazione all altra ATTENZIONE L e prese d aria non vanno ostruite e devono consentire il libero ricircolo dell aria ambiente per il raffreddamento vii gt gt viii TEMPERATURA DI FUNZIONAMENTO Questo prodotto amp concepito per una temperatura ambientale massima di 50 gradi centigradi TUTTI I PAESI installare il prodotto in conformit alle vigenti normative elettriche nazionali UTSTR LT ENERGI Dette kommersielle produktet har blitt testet og er i samsvar med amerikanske krav for et A Klasse apparat SIKKERHET ELEKTRISKE MEDDELELSE ADVARSEL FARE FOR ELEKTRISK SJ OKK For unng ELEKTRISK sjokk m dekslet ikke tas av Det finnes ingen deler som du kan bruke p in
17. E 802 3 10BASE FL standard supports up to 2 000 meters 6 560 ft of multimode duplex fiber optic cable in a point to point link which directly attaches two devices Duplex refers to support for fiber optic cable pairs enabling a two cable fiber optic connection with transmit mode dedicated to one cable and receive mode on the other 10BA SE F L supports connections of 2 000 meters 6 560 ft while F OIRL supports connections of 1 000 meters 3 280 ft F L is compatible with FOIRL but restricts distance to 1 000 meters 3 280 ft The wide dynamic rangeofthefiber opticinterfaceonthe AT MR 118F T and AT MR 128F T allows for an easy installation When connecting fiber optic cable the receiving pin RD is connected to the transmitting pin T D and vice versa 10BASE5 Thick Ethernet When configuring 10BA SE 5 coax segments I E E E 802 3 specifications allow 100 MAU attachments or less spaced at multiples of 2 5 meters 8 2 ft measured accurately from the cable end 50 2 terminator included The LOBASE 5 cable segment can not exceed 500 meters 1 640 ft in length Worst case end to end propagation delay of a 10BASE 5 coax segment is 2165 ns Propagation delay of 10BASE 5 Ethernet coax is calculated at 4 33 ns meter B oth ends of the segment must be terminated with 50 0 termination with a power rating of 0 5 watts or I Fl grounding of the segment shield must take place at only one point on the cable AUI Drop Cables AUI o
18. E FL Fiber Optic Connections Chapter 3 Operation eten attente ede Switches Indicators Setting Up Y our Repeater Chapter 4 Configuration oer err erase eine quia erae eine 11 Chapter 5 Troubleshooting menen nnn pdt p m sa 13 E xperiment with Possible Solutions 13 17 Data soning Techniques mmv ice tne reet ci enis 17 10BASE UTP E RE 18 10BASE FL FOLRL Ethical rd aaa 22 10BASE 5 Thick Ethernet AUI Drop 10BASE 2 Thin E thernet xi 25 GIOSSAFV rate tare e dg etd dd 25 31 Technical Support Fax Order 1T 2 31 33 CentreCOM AT MR118FT and AT MR128FT Manual Feedback 33 Index iro m NT hee n PRU a e DA iid ea 35 List of Figures Figure 1 AT MR118FT Front and Back 8 Figure 2 AT MR128FT Front and Back 8 Figure 3 Typical Hub Configuration 11 Figure4 10BASE T UTP Cabling HubtoMAU or NIC Straight Through 19 Figure 5 10BASE T UTP Cabling Hub to Hub Cross Over 19 Figure6 Hub to MAU Wiring A Usable and B Unusable 21 Figure 7 Pin 1 Orientation on RJ 45 Connector 22 List of Tables Table 1 The AT MR118FT and AT MR128FT Characteristics
19. ER Ja R M mr MR128FT 10BASE FL FOIRL 10BASE T IEEE 802 3 MICRO REPEATER Figure 2 AT MR128FT Front and Back Panels Setting Up Your Repeater is an example procedure that results in the configuration in Chapter 4 The sample configuration contains the following elements AnAttachment U nit Interface AU I U TP hub connected to a 10BASE 5 network in the main building A AnAT MRI118FT repeater in the main building A AnAT MR128FT in the remote building A AnAUI UTP hub in the remote building CentreCOM Micro Repeaters D To set up the sample configuration 1 Plug in the power cords to a power outlet for all devices 2 Useeither a cross over or straight through cable to connect your AUI UTP hub to the AT MR 118F T UTP port If you are using a cross over cable change the position of the straight through cross over selection switch on theAT MR 118F T to Media D ependent I nterface cross over MDI X so that the hub repeater connection can occur 3 Use fiber optic cable to connect your AT MR 118F T fiber optic port in the main building to the AT MR 128F T fiber optic port in the remote building When connecting fiber optic cable thereceiving pin R D is connected to the transmitting pin TD and vice versa 4 If you want toreducethe effective repeater count on your network set your full repeater half repeater switch toHALF toinitiate half repeater mode I f you
20. WN BLOCK T he punch down block is the wiring panel wherethe house wiring from the building s offices terminates This is where many 10BASE T hubs would be located Wiring installers use a special punch down tool to insert the UTP wire for data and voice applications REPEATER A device used to extend the length topology or interconnectivity of the physical medium beyond that imposed by a single segment up tothe maximum allowable end to end trunk transmission line length R epeaters perform the basic actions of restoring signal amplitude waveform and timing applied to normal data and collision signals RJ 45 T his connector is 108 A SE T standard for connecting U TP cabling They are inexpensive and easy to install onto U TP cable SIGNAL QUALITY ERROR SQE A Iso referred to as Collision or Collision Presence This occurs when two devices attempt to transmit at the same time which is an illegal condition SQE TEST Commonly referred to as H eartbeat is a special 802 3 signal sent by theMAU totheDTE totest the collision detection function Some DTE want SQE and others do not R epeaters do not want SQE Test STRAIGHT THROUGH A type of wiring connection where the pins of one connector connect to the same pins of another connector For example pin 1 of one connector connects to pin 1 of another connector THICK ETHERNET See 10BASE 5 THIN ETHERNET See 10BASE2 TRUNK CABLE The trunk coaxial cable system UNSHIELDED TWISTED
21. actured with voice quality cabling If any voice quality cabling is used in a 10BASE T network system data movement is slow collision prone or non existent To confuse the issue the L ink indicator on the interface will usually indicate a valid link in such a case F or the foregoing reasons it is absolutely vital that all cabling used with the 10 5 connections is of Level 3 4 or 5 As a rule of thumb if a cable type 15 flat it is typically untwisted and will cause problems If a cable is more or less round in section it will typically work 17 Data Cabling Techniques The five common modular cable specifications and their applicability to LOBA SE T network use are shown in Table 3 Table 3 Usable and Unusable Twisted Pair Cable Cable Cable TNT Twist 10BASE T Level Description AC Character Specification Foot OK 1 Unshielded N A CCITT None NO Untwisted 2 Individual 100 0 30 0 85232 UTP 1BASE5 AT amp T PDS 3 Typical 1000271520 T1 AT amp T 3 5 YES Individual ISDN UTP 10BASE T IBM Type 3 4 Enhanced 100 0 30 0 EIA TIA 5 8 YES Individual 10BASE T UTP NEMA 5 Individual 100 0 30 0 EIA TIA 8 10 YES UTP 10BASE T UTP Port Wiring TheAT MR 118F T and AT MR 128F T both have a 10BASE T UTP port with an industry standard RJ 45 receptacle The straight through cross over switch enables you to configure the port as either a MDI or MDI X This sw
22. 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 manual found the following the most valuable I would like the following more developed I would find the manual more useful if Please fax or mail your feedback Fax to 1 206 481 3790 Or mail to Allied Telesyn Technical Publications Department 19015 North Creek Parkway Suite 200 Bothell WA 98011 USA 33 Index A adapters harmonica 27 Telco 50 pin RJ 45 27 American Wire Gauge AWG 5 Application Specific Integrated Circuit ASIC 1 Attachment Unit Interface AUI 8 AUI 9 22 25 AUI drop specification 22 automatic segmentation 7 B baseband coaxial system 25 bit rate 25 bit time 26 C cabling 1 3 6 10BASE2 23 10BASE5 8 10BASE FL 5 6 cross over cable 9 fiber optic LOBASE FL 1 Fiber Optic Inter Repeater Link FOIRL 1 FOIRL 5 6 straight through 9 UTP 10BASE T 5 UTP to fiber optic 3 carrier sense 26 coax segment 26 coaxial cable 26 coaxial cable segment 26 collision 26 collision presence 26 compatibility interface 26 compliance four repeater rule 2 IEEE 802 36 IEEE 802 3 specification 1 5 connector types 1 3 6 RJ 453 5 connectors 50 pin AMP 25 50 pin Telco 25 BNC 25 DIX 27 D sub 26 N series 28 RJ 45 25 29 SMA 1 3 6 ST 1 3 6
23. cators are common to the micro repeaters AT MR118F T and AT MR 128F T both have five indicators per port n addition there is a power LED for the entire repeater E ach indicator is described below ndicates the AC power adapter or power supply is providing power to the repeater Collision ndicates a collision detected on that port On Line ndicates when the port is ready for operation and is not partitioned Receive ndicates when a packet is received on that port Brief flashes indicate low traffic levels Transmit ndicates when a packet is transmitted Operation Link ndicates when a valid link is detected by the receiver The fiber optic Link indicator must be illuminated at both ends of the segment for E thernet data to flow Figure 1 and F igure 2 show the indicators and ports for both the AT MR 118F T and AT MR 128F T micro repeaters COLLISION RECEIVE Alied Telesyn International PORT 1 10BASE T IEEE 802 3 MICRO REPEATER m Allied Telesyn International RJ45 PIN OUT CentreCOM x REPEATER RX 10BASE FL FOIRL 10 BASE T Figure 1 AT MR118FT Front and Back Panels MVE 355550 gt Cam CentreCOM G eso perl eo dd y bom o o o c IEEE 802 3 MICRO REPEATER PORT 1 JOBASET PORT 2 10BASE FL FOIRL LE m AMP esken O mas PINOUT Ce ntre M POW
24. e 1x8F T is MDI X The straight through cross over switch merely provides convenience to avoid having to obtain an alternate cable in some applications I f you connect a cable and it does not work try changing the MDI switch Therule of thumb isthe total number of cross overs must be odd Y ou cannot harm the repeater by having the MDI switch in the wrong position lo Table 4 shows which position the straight through cross over selection switch needs to be for the device configuration shown Table 4 MDI and MDI X Switch Settings for Common Connection Model Connected to MDI MDI X AT MR118FT AT MR128FT Hub X AT MR118FT AT MR128FT MAU X AT MR118FT AT MR128FT NIC X AT MR118FT AT MR128FT Transceiver X This table assumes a straight through cable is being used The switch settings are the opposite of what is shown if a cross over cable is being used 20 CentreCOM Micro Repeaters In both the cross over and straight through instances the wire is twisted pair F igure 6 demonstrates usable and unusable cable configurations for the straight through wire pairing in the UTP environment A 1 Pair twisted as per Level 3 4 or 5 cable RJ45 Pin RJ45 Pin 1 TD O O TD TD jug 2 TD RD RD 1 Not Used Not Used Not Used 5 5 Not Used RD RD Not Used 7 7 Not Used Not Used Not Used B This cable will not work for 10BASE T Note that 3 and 6 are t
25. e vertical ATTENTION N e pas bloquer les fentes d a ration ce qui emp cherait l air ambiant de circuler librement pour le refroidissement TEMPERATURE DE FONCTIONNEMENT Ce produit est capable de tol rer une temp rature ambiante maximum de 50 degr s Celsius POUR TOUS PAYS Installer le produit conform ment aux normes lectriques nationales et locales S TEILYENERGIA T m kaupallinen tuote on testattu ja noudattaa Yhdysvaltojen vaatimuksia luokan A laitteelle TURVALLISUUS N S HK N LIITTYVI HUOMAUTUKSIA VAROITUS S HK ISKUVAARA E st ksesi S HK ISKUN l poista kantta Sis ll ei ole k ytt j n huollettavissa olevia osia T m laite sis lt VAARALLISIA J NNITTEIT jasen voi avata vain koulutettu ja p tev teknikko V ltt ksesi S HK ISKUN mahdollisuuden katkaise s hk virta tuotteeseen ennen kuin liit t tai irrotat paikallisverkon LAN kaapelit SALAMANISKUVAARA HENGENVAARA ALA OSKENTELE laitteiden tai KAAPELEIDEN KANSSA SALAMOINNIN AIKANA gt HUOMAUTUS VIRTAJOHTOA KAYTETAAN VIRRANKATKAISULAITTEENA VIRTA KATKAISTAAN irrottamalla virtajohto ASENNUS m SAHKO AUTOMAATTINEN J ANNITTEENSAATO T m tuote s t automaattisesti mihin tahansa j nnitteeseen ohjetarrassa annettujen arvojen v lill S HK TYYPPILUOKAN 1LAITTEET T M LAITE T YTYY MAADOITTAA Pistoke t ytyy liitt kunnollisesti maadoitettuun pistorasiaan Virheellisesti johdotettu p
26. enutzer wartbaren Teile Das Ger t steht unter Hochspannung und darf nur von qualifiziertem technischem Personal ge ffnet werden Vor AnschluB der LAN Kabel Ger t vom Netz trennen GEFAHR DURCH BLITZSCHLAG GEFAHR K eine Arbeiten am Gerat oder an den K abeln wahrend eines Gewitters ausf hren VORSICHT DAS NETZKABEL DIE STROMVERSORGUNG ZUR TREN STECKDOSE ZIEHEN mo NT ZU NU LAUS DER INSTALLATION AUTOMATISCHE SPANNUNGSEINSTELLUNG Dieses Ger t stellt sich automatisch auf die auf dem Etikett aufgef hrten Spannungswerte ein KLASSE 1 DIESE GERATE MUSSEN GEERDET SEIN Der Netzstecker darf nur mit einer vorschriftsm ig geerdeten Steckdose verbunden werden Ein unvorschriftsm iger Anschlu kann das Metallgeh use Teile unter gef hrliche elektrische Spannungen setzen NETZKABEL Das N etzkabel sollte eine maximale L ange von 4 5 Metern einen Nennwert von mindestens 6A und 250 V haben aus HAR Material hergestellt und mit einer gepre ten 1E C 320 entsprechenden nschluBverbindung an einem E nde und am anderen E nde mit einem im L and des E ndverbrauchers gepr ften Stecker ausgestattet sein VORSICHT DieE ntl ftungs ffnungen d rfen nicht versperrt sein und m ssen zum K hlen freien Zugang zur Raumluft haben BETRIEBSTEMPERATUR Dieses Produkt wurde f r den Betrieb in einer U mgebungstemperatur von nicht mehr als 50 C entworfen Alle L nder Installation mu rtlichen und nationalen elek
27. es TENSION S DANGEREUSES et ne doit tre ouvert que par un technicien d ment qualifi Pour viter tout risque d E LE CTROCUTION d brancher l appareil de la prise de courant avant de connecter ou de d connecter les c bles LAN DANGER DE FOUDRE DANGER DANGER NE PAS MANIER l quipement ou les CABLE S pendant les p riodes d activit orageuse TATIO T DE MISE HORS CIRCUIT ATTENTION LE CORDON D ALIMENTATION SE N DE L APPAREIL d branchez le cordon POUR COUPER L ALIMENTATIO INSTALLATION ELECTRICITE REGLAGE DE TENSION AUTOMATIQUE Ce produit peut s ajuster automatiquement sur n importe quelle tension comprise dans la plage indiqu e sur le label ELECTRICITE EQUIPEMENT DE CLASSE 1 CET APPAREIL DOITETRE MISA LA TERRE La prise de courant doit tre branch e dans une prise femelle correctement mise la terre Sinon des tensions dangereuses risqueraient d atteindre les pi ces m talliques accessibles l utilisateur ELECTRICITE INFORMATION SUR LE CORDON Utiliser un cordon secteur de 4 5 m tres de long maximum calibr 6 amp res minimum 250V et fabriqu en c blage HAR avec connecteur I E C 32C moul une extr mit et l autre extr mit une prise de courant m le r pondant aux normes du pays d utilisation INSTRUCTIONS DE MONTAGE ATTENTION Ces mod les sont destin functionner en position horizontale L appareil NE DOIT PAS tre utilis en MONTA GE VERTICAL sans employer un chassis de montag
28. for half repeater mode the effective repeater count is three enabling you to add another repeater without violating the four repeater limit I f you want to realize the benefit of a repeater reduction you haveto remember to initiate half repeating on two repeaters connected to each other CentreCOM Micro Repeaters The UTP to fiber optic port transmission needs to be regenerated by Note the PRC to ensure integrity of timing Because the U TP to fiber optic 5 transmission is routed through regenerating chip it uses the full repeater strategy and does not provide the repeater count reduction benefit associated with the half repeater strategy Connector Types E ach repeater supports both fiber optic and UTP versions RJ 45 connection The fiber optic repeater is available in either an SMA and ST version The SMA screws into a threaded receptacle The ST twists into a twist lock receptacle Power Requirements The power requirements of both the AT MR 118F T and the AT MR 128F T are described below External Power Supply Micro Repeaters TheAT MR 118F T has an external universal AC input DC output power supply L ocate a 100 240 V AC 50 60 2 outlet and plug in the standard equipment power cord The power cord is only supplied in the U S A version m Use only the AC power adapter U sing another manufacturer s power Note adapter may permanently damage your micro repeater and void your s warranty
29. ga best mmelser f r elektrisk utrustning List of Figures List of Figures Figure 1 AT MR118FT Front and Back Panels 8 Figure 2 AT MR128FT Front and Back Panels 9 Figure 3 Typical Hub Configuration 11 Figure 4 10BASE T UTP CablingHubtoMAU or NIC Straight Through 19 Figure 5 10BASE T UTP Cabling Hub to Hub Cross Over 19 Figure 6 HubtoMAU Wiring A Usable and B Unusable 21 Figure 7 Pin 1 Orientation on an RJ 45 Connector 22 List of Tables List of Tables Table 1 The AT MR118FT and AT MR128FT Characteristics 1 Table 2 CentreCOM Micro Repeater Dimensions 2 Table 3 Usable and Unusable Twisted Pair Cable 18 Table4 MDI MDI X Switch Settings for Common Connection 20 Table of Contents Electrical Safety and Installation Requirements iii Listof Figures iii ee eds i Listof Tables oer uet m een i Chapter 1 Overview luid RS CentreCOM Fiber Optic to 10BA SE T Micro Repeaters Dimensions of Internal and E xternal Micro F ull and H alf R epeater Modes Connector T y Des irasci OPE Rr tiu Eee LEN RC ate Power Requirements acti tee e a ede heki ag E xternal Power Supply Micro R epeaters Internal Power Supply Micro R Chapter 2 Cabling dard in entera 10BASE T UTP Connections eene nnns FOIRL or 10BAS
30. istorasia voi altistaa metalliosat vaarallisille j nnitteille S HK J OHTOON LIITTYV HUOMAUTUS K yt seuraavanlaista virtajohtoa maksimipituus 4 5 metri minimiteho 6 ampeeria 250 V valmistettu H AR johdostosta muovattu E C 320 liitin toisessa p ss ja k ytt maassa hyv ksytty pistoke toisessa p ss HUOMAUTUS I Imavaihtoreiki ei pid tukkia ja niill t ytyy olla vapaa yhteys ymp r iv n huoneilmaan jotta ilmanvaihto tapahtuisi K YTT L MP TILA T m tuote on suunniteltu ymp r iv n ilman maksimil mp tilalle 50 C KAIKKI senna tuote paikallisten ja kansallisten s hk turvallisuusm r ysten mukaisesti ENERGIA IRRADIATA Ouesto prodotto commerciale amp stato collaudato e risponde ai requisiti U S A per i dispositivi di classe A NORME DI SICUREZZA AVVERTENZE ELETTRICHE PERICOLO DI SCOSSE ELETTRICHE Per evitare SCOSSE ELETTRICHE asportare il coperchio L e componenti interne non sono riparabili dall utente Questa unit ha TENSIONI PERICOLOSE eva aperta solamente da un tecnico specializzato e qualificato Per evitare ogni possibilit di SCOSSE ELETTRICHE interrompere l alimentazione del dispositivo prima di collegare staccare i cavi LAN PERICOLO DI FULM INI PERICOLO NON LAVORARE suldispositivoosui CAVI durantePRECIPITAZIONI TEMPORALESCHE ATTENZIONE IL CAVODI ALIM DISATTIVAZIONE PER TOGLIE cavo di alimentazione ENTAZIONE E USATOCOME DISPOSITIVO
31. itch enables you to use either a cross over cable or a straight through cable no matter which interface type MDI or MDI X the device being connected to has The standard connection when using a micro repeater is from a Data Communications E quipment DCE device such as the repeater toa DTE device such as a workstation NIC This configuration uses a straight through cable see Figure 4 with the switch in the MDI X position CentreCOM Micro Repeaters UTP MAU UTP HUB RJ45 PIN RJ45 PIN TD O TD TD 2 TD RD RD Not Used a Not Used Not Used G 5 Not Used RD 6 6 RD Not Used 7 7 Not Used Not Used Not Used Figure 4 10BASE T UTP Cabling Hub to MAU or NIC Straight Through Some situations require a DCE to DCE connection for example when hubs are cascaded This can be accomplished with a standard cross over cable as illustrated in Figure 5 By setting the switch to MDI you may use a straight through cable eliminating the need for making or obtaining a cross over cable UTP MAU UTP MAU RJ45 PIN RJ45 PIN TD TD TD 2 TD RD 3 Not Used Not Used Not Used 5 Not Used RD 6 6 RD Not Used 7 7 Not Used Not Used Not Used G RD Figure 5 10BASE T UTP Cabling Hub to Hub Cross Over 19 Data Cabling Techniques Note Theinterfacetypethat EEE specifies as standard for a repeater such as th
32. ive UTP signal technique The figure assumes that the MDI X switch has been activated on both Note theAT MR 118F T and AT MR 128F T repeaters enabling a hub to hub 5 connection See A ppendix A for more information u a Figure 3 Typical Hub Configuration Chapter 5 Troubleshooting Experiment with Possible Solutions This chapter provides the common factors to check for troubleshooting The first rule of troubleshooting is to isolate the problem AS you experiment only vary one factor at atime Substitute known good equipment and see if the problem persists or is eliminated D 1 Asa preliminary check perform the following steps Do not overlook the obvious make sure the cables and connectors are securely attached If there is no power indication check the AC power adapter at the AC receptacle and ensure that there is A C power available Also ensurethat the power plug at the micro repeater is properly seated On the AT MR 118F T or AT MR 128F T if there is still no power indication replace the power adapter and test again Ifthe link L E D does not illuminate with U TP or fiber optic media make sure the cabling is intact and connected to a functioning network port If the link LE D illuminates on a 10BA SE T segment but data transfer is slow collision prone or non existent verify that your UTP cable is L evel 3 4 or 5 Level 1 and 2 voice quality cable will not w
33. maximum coaxial segment Cable impedance is 500 10BASE 5 A Iso called thick Ethernet 10BASE 5 is a 10 MHz baseband 500 meters 1 640 ft maximum coaxial segment T he cable is commonly referred to as yellow cable Cable impedance is 50 Q Thick Ethernet cable is typically used as a trunk or backbone path of the network 10 5 802 3 F Optic Ethernet fiber optic standard that allows ap N meters 6 560 ft of multimode duplex fiber optic cable in a point to point link 10 5 802 3UTP Ethernet U sing low cost evel 3 or better UTP wiring 100 meters 328 ft of point to point link segments are possible U ses RJ 45 connectors and sometimes 50 pin AMP connectors to a patch panel R uns at 10 MHz 50 PIN TELCO RJ 21 This connector is very common in 108 5 wiring A s opposed to the RJ 45 connector the 50 pin Telco connector concentrates up to 12U TP connections onto one connection This concentration of U TP ports is then broken out for connection to a punch down block inside a building s wiring closet 50 pin Telco connections provide a very clean uncluttered interface to the building s wiring ATTACHMENT UNIT INTERFACE AUI This is the cable connection from a MAU transceiver to a DTE typically a workstation consisting of a 15 conductor twisted pair cable of 50 meters 164 ft maximum length BASE BAND COAXIAL SYSTEM A system whereby information is directly encoded and im
34. more wiring closets such as a telephone room Some older buildings may have wiring unsuitable for 10 M egabit data rates In these circumstances it is recommended that the wiring is tested with a 10BASE T signal wire tester IMPEDANCE An electrical characteristic of a circuit dealing with the combination of the AC and DC resistance and the appearance of that resistanceto attached circuits JABBER LOCK UP T he MAU s ability to automatically inhibit the transmit data from reaching the medium if the transmit data time length exceeds 150 ms duration This protects the medium from being overrun with data packets from a possibly defective device J AM T his is aterm used to describe the collision reinforcement signal output by the MAU onto the transmission medium if the transmit data time length exceeds 150 us duration This protects the medium from being overrun with data packets from a possibly defective device JITTER The fluctuation of the data packet in respect to a standard clock cycle J itter is undesirable and must be minimized LINK SEGMENT T he link segment of coaxial cable is a segment which has no MAU devices but links two LAN devices together such as repeaters 27 Glossary LINK TEST In 10BASE T Ethernet there is a link test function that validates the UTP link This consists of a pulse transmitted from point A on one pair and validated at point B Point B also transmits a pulse on the second pair to be validated by p
35. n block This provides a convenient way for the installer or network manager to connect the hub 10BASE T ports into the desired building locations PHYSICAL MEDIUM ATTACHMENT PMA T he portion of the MAU that contains the functional circuitry PHYSICAL SIGNALING PLS T hat portion of the physical layer contained within the DTE that provides the logical and functional coupling between MAU and data link layers POLARITY CORRECTION Many 10BASE T UTP ports have a Polarity Correction function f the UTP wiring has RD and RD inadvertently crossed the polarity correction function will sample the signal and electrically swap the wires If the TD and TD wires are crossed the correction would occur at the MAU onthe other end of the UTP link This occurs within a single pair and should not be confused with the cross over cable 28 CentreCOM Micro Repeaters PROPAGATION DELAY Thetime it takes a signal to travel from the input of a system component to the output U sually measured in nanoseconds E E E 802 3 has specific propagation delay maximums for computing propagation budgets when designing aLAN Cable length plays a major role in propagation delay i e 50 meters 164 ft AUI cable has a maximum allowable propagation delay of 257 ns The propagation delay of cable is dependent on length and velocity factor of the cable type There are also propagation delays associated with electronics attached tothe system PUNCH DO
36. n ene ende og et stik i den anden ende godkendt der er af myndighedernei brugerlandet ADVARSEL V entilations bninger m ikke blokeres og skal have fri adgang til den omgivende luft i rummet for afk ling BETJ ENINGSTEMPERATUR Dette apparat er konstrueret til en omgivende temperatur p maksimum 50 grader C ALLE LANDE Installation af produktet skal ske i overensstemmelse med lokal og national lovgivning for elektriske installationer STRALINGSENERGIE Dit handelsprodukt werd getest en voldoet aan de Amerikaanse vereisten voor een klasse A toestel VEILIGHEID WAARSCHUWINGEN MET BETREKKING TOT ELEKTRICIT EIT WAARSCHUWING GEVAAR VOOR ELEKTRISCHE SCHOKKEN Gelieve het deksel niet te verwijderen teneinde ELEKTRISCHE schokken te voorkomen B innenin bevinden zich geen onderdelen die door de gebruiker kunnen worden onderhouden Dit toestel staat onder GEVAARLIJKE SPANNING en magalleen worden geopend door een daartoe opgeleide en bevoegde technicus Om het gevaar op ELEKTRISCHE SCHOKKEN te vermijden moet u het toestel van de stroombron ontkoppelen alvorens de LAN kabels te koppelen of ontkoppelen WAARSCHUWINGEN GEVAAR VOOR BLIKSEMINSLAG GEVAAR NIET aan toestellen of KABELS WERKEN bij BLIKSEM WAARSCHUWING HET TOESTEL WORDT UITGESCHAKELD DOOR DE STROOMKABEL TE ONTKOPPELEN OM HET TOESTEL STROOMLOOSTE MAKEN stroomkabel ontkoppelen INSTALLATIE AELEKTRISCH AUTOMATISCHE AANPASSING VAN DE SPANNINGL Dit toestel past zich automa
37. nsiden Denne enheten inneholder FARLIGE SPENNING og m kun pnes av en oppl rt kvalifisert tekniker For unng muligheten av ELE KTRISK SJOKK m den elektriske str mmen til produktet v re av n r du sl r LAN ledninger av og p FARE FOR LYNANTENNELSE M IKKE BRUKES p utstyr eller ledninger mens LYN AKTIVITET er i gang FORSIKTIG STR MLEDNINGEN BRUKES TIL SL APPARATET AV HVIS DU VIL DEAKTIVISERE UTSTYRET m du fjerne str mledningen INSTALLASJ ON ELEKTRISK AUTO SPENNINGSTILPASSING Dette produktet vil automatisk bli tilpasset hvilken som helst str minnstilling i de omr dene som vises p etiketten ELEKTRISKE TYPE 1 KLASSE UTSTYR DETTE UTSTYRET M ORDES Strgmkontakten m v re tilkoplet en korrekt jordet grunnstgpselkontakt E n stgpselkontakt som ikke er jordet p rett m te kan tilf re farlig spenning til lett tilgjengelige metalldeler ELEKTRISKE MEDDELELSE OM LEDNINGER Bruk en str mledning av maksimal st rrelse 4 5 m i lengde vurdert for minst av 6 amp 250V fremstilt av HAR ledning I E 320 koplingsstykke p den ene kanten og p den andre kanten en plugg som har blitt godkjent i det landet hvor den siste brukeren befinner seg FORSIKTIG L uftventilene m ikke blokkeres og m ha fri tilgang til luft med romtemperatur for avkj ling DRIFTSTEMPERATUR N Dette produktet har blitt fremstilt til bruk med maksimum romtemperatur p 50 grader celsius ALLE LAND Produktet m i
38. nstalleres i samsvar med de lokale og nasjonale elektriske koder ENERGIA RADIADA Este produto foi testado e atende aos reguisitos para dispositi vos comerciais de Classe A nos E U A SEGURANCA AVISOS SOBRE CARACTER STICAS EL TRICAS ATENC O PERIGO DE CHOQUE EL TRICO Para evitar CHOQUE EL TRICO nao a tampa o cont m pecas que possam ser consertadas pelo usuario E ste aparelho cont m VOL TAGE NS PERIGOSAS es deveser aberto por um t cnico qualificado e treinado Para evitar a possibilidade de CHOQUE ELETRICO desconecte o aparelho da fonte de energia el trica antes de conectar e desconectar os cabos da LAN PERIGO DE CHOQUE CAUSADO POR RAIO PERIGO NAO TRABALHE no equipamento ou nos CABOS durante per odos suscet veis de QU E DAS DE RAIO CUIDADO OCABODE ALIMENTAC O UTILIZADO COMO UM DISPOSITIVO DE DESCONEXAO PARA DESELETRIFICAR OE QUIPAMENTO desconecte o cabo de alimenta o INSTALAC O ELETRICO AJ USTE AUTOM TICO DE VOLTAGEM E ste produto ajustar se automaticamente a gualguer voltagem que esteja dentro dos limites indicados no r tulo EL TRICO EQUIPAMENTOS DO TIPO CLASSE 1 DEVE SERFEITA LIGACAO DE FIOTERRA PARA ESTE EQUIPAMENTO O plugue deve ser conectado a uma tomada com ligac o de fio terra Tomadas sem ligac o de fio terra podem transmitir voltagens perigosas a pecas met licas expostas ELETRICO AVISO SOBRE O CABO DE ALIMENTACAO U se cabo de alimentac o com comprimento m ximo
39. oint A These pulses occur during media idle states in between packets MANAGEMENT AGENT Software that is used to view hub activity and set hub variables MAU See M edium Attachment U nit MAU to MAU HUB to HUB WIRING 10BASE T MAU to MAU or hub to hub wiring generally requires a cross over cable located somewhere along the UTP cablerun This may commonly occur at the punch down block or between the RJ 45 wall receptacle and the workstation MAU TRANSCEIVER AnE thernet transceiver isaMAU A 10BASE T MAU interfaces the UTP media to an AUI port on a workstation repeater bridge or other E thernet devices MDI MDI X See Medium Dependent I nterface 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 T he mechanical and electrical interface between the trunk cable medium and the MAU MDI X is another version of the interface that enables like devices to connect using different pin outs avoiding conflicts that occur when receiving and transmitting packets use the same pin out N SE RIES A barrel shaped threaded connector used on 10 SE 5 thick E thernet coaxial cable PATCH PANEL A 10BASE T patch panel may be between a punch down block and UTP workstation The patch panel generally has a female RJ 45 connector on the front for each workstation and aT elco RJ 21 connector on the back which are wired to a punch dow
40. ork properly If the cable is more or less round you probably have data grade cable In this case it would not cause transmission problems I f however the cable appears flat as Silver Satin telephone type cable you probably have voice grade cable which will cause transmission problems f it looks like telephone cable discard the cable and connect the repeaters using data grade cable Check that the pin outs are correct Seethe procedurefor U TP port on page 14 18 Troubleshooting D On a fiber optic segment if the Link indicator is not illuminated or data packet traffic is disrupted 1 Check that the fiber optic Link indicator is illuminated on both ends of the fiber optic link 2 Be sure the receive fiber is connected to the remote transmit port and the transmit fiber is connected to the remote receive port I f in doubt it does no harm to reverse the two fibers Check if the L ink indicator is illuminated 3 Check that the fiber optictransmit and receive ports are functioning by installing the AT MR 118F T or AT MR 128F T in place of another fiber optic repeater that is known to work Check if the L ink indicator is illuminated 4 Check the fiber optic cable itself by swapping a fiber optic repeater that is known to work for the AT MR118FT or AT MR 128F T Check if the Link indicator is illuminated Do not attempt to use the fiber optic micro repeater as a light source Note with the following test The light power
41. pressed on the coaxial transmission medium At any point on the medium only one information signal at a time can be present without disruption BAYONET NUT COUPLE BNC CONNECTOR A 10BASE2thin coax connector with push on BNC locking lug that quickly locks into place with a half twist BIT RATE BR This is therate of data throughput on the medium in bits per second E thernet specifies 10 million bits per second BRANCH CABLE The AUI cable interconnecting the DTE and MAU system components also known as a Drop cable 25 Glossary BIT duration of one bit symbol 1 BR Ethernet specifies a bit time of 100 ns COAX SEGMENT A segment of Ethernet cable that contains MAU CARRIER SENSE MULTIPLE ACCESS with COLLISION DETECT CSMA CD This is the access method employed by IEEE 802 3LAN transceivers by which multiple stations compete for use of the transmission medium coax cable for data packet transmission and provides for a level of error detection should that transmission be corrupted or impeded by contention for the transmission medium CARRIER an ongoing activity of a data station to detect whether another station is transmitting 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 connecto
42. r Drop cables can be no longer than 50 meters 164 ft each Attachments may be made only to the cable ends at the 15 pin D shell connector AUI cables may have a maximum 257 ns propagation delay as used for computing the worst case propagation delay of a cable system AUI cable propagation delay is approximately 5 13 ns meter This cable internally consists of four shielded twisted pair wires with an overall shield and drain wire a 15 pin D shell male connector at one end and a 15 pin D shell female connector at the other end Cableimpedanceis nominally 78 O The AUI cable typically connects a transceiver attached to a coaxial segment to a DTE workstation 22 CentreCOM Micro Repeaters 10BASE2 Thin Ethernet W hen configuring thin coax segments I E E E 802 3 specifications allow 29 or fewer MAUS per cable segment spaced at no less than 0 5 meter 1 64 ft The LOBA SE 2 cable length can not exceed 185 meters 607 ft per SE 2 cable segment The worst case propagation delay for a 185 meters 607 ft thin E thernet segment is 950 9 ns The propagation delay for LOBASE 2 Ethernet cable is 5 14 ns meter Both ends of the segment must be terminated with a 500 termination with a power rating of 0 5 watts or greater E arth grounding of the segment shield must take place at only one point on the cable 23 Appendix B Glossary 10BASE 2 Iso called thinnet or CheaperN et 10BA SE 2 is a 10 MHz baseband 185 meters 607 ft
43. rs and terminated at each end in its characteristic impedance COLLISION A n unwanted condition that results from concurrent transmissions on the physical medium COLLISION PRESENCE A signal provided by the PLS tothe PMA sublayer within the physical layer to indicate that multiple stations are contending for access to the transmission 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 CROSS OVER Wiring is used when connecting a 10BA SE T MAU to another 10BASE T MAU or a 10BASE T hub to another 108 SE T hub F or example one 10BASE T MAU would have the TD pair on the same pins as another 10BASE T MAU If pins were wired straight there would be two transmitters on one pair with no receiver Therefore the cross over cable crosses the TD pair with theRD pair of UTP cable connecting the TD pins on one end to the RD pins at the other end D SUB CONNECTOR TheAUI cable uses 15 pin D sub connectors D refers to the shape of the connector shell Also called miniature D DB 15 or DIX connector s DATA COMMUNICATION EQUIPMENT DCE InRS5232 specification a unit such as a modem for connecting a DTE to other equipment A repeater connected to a terminal or workstation for OME GA LOCAL management use is wired as a DCE
44. s Denna apparat r under H OGSP NNIN G och f r endast ppnas av en utbildad kvalificerad tekniker r att undvika ELEKTRISK ST T koppla ifr n produktens str manslutning innan LAN kablarna ansluts eller kopplas ur FARA F R BLIXTNEDSLAG E FARA ARBETA EJ p utrustningen eller kablarna vid SKV DER VARNING N TKABELN ANV NDS SOM STR MBRYTARE F R ATT KOPPLA FR N STR MMEN draur n tkabeln INSTALLATION ELEKTRISKT AUTOMATISK 5 5 USTERING Denna produkt justeras automatiskt till alla sp nningar inom omf nget som indikeras p produktens m rkning ELEKTRISKT TYP KLASS 1 UTRUSTNING DENNA UTRUSTNING M STE VARA J ORDAD N tkabeln m ste vara ansluten till ett ordentligt jordat uttag E tt felaktigt uttag kan g ra att n rliggande metalldelar uts tts f r h gsp nning A pparaten skall anslutas till jordat uttag n r den ansluts till ett n tverk ELEKTRISKT ANMARKNING BETRAFFANDE KABELN Anv nd en kabel med maximum l ngd 4 5 meter och minimum 6 amp nominal 250V av HAR kabelfabrikat med ett specialutformat I E C 320 kontaktdon i ena nden och i den andra en plugg som godk nts i landet d r produkten anv nds VARNING uftventilerna f r ej blockeras och m ste ha fri tillgang till omgivande rumsluft f r avsvalning DRIFTSTEMPERATUR Denna produkt r konstruerad f r rumstemperatur ej verstigande 50 grader Celsius ALLA L NDER Installera produkten i enlighet med lokala och statli
45. segments allow the maximum number of nodes specified by the IEEE 802 3 specification The repeaters are both compliant with both I E E E 802 3 and E thernet standards Both repeaters use state of the art technologies including a custom A pplication Specific ntegrated Circuit ASI C and Surface Mount Technology SMT which provide enhanced functionality increased reliability and improved performance N etwork diagnostic LE Ds are provided on the front of the micro repeaters to aid in troubleshooting and fault isolation Both segments have On L ine Collision Receive Transmit and Link indicators In addition both repeaters have a central Power indicator R efer to I ndicators on page 7 for more information Overview Dimensions of Internal and External Micro Repeaters The primary difference between the AT MR 118F T and the AT MR 1282 T repeaters is that the AT MR 128F T is a larger repeater because both the repeater and the power supply reside together in one chassis The dimensions of the two repeaters are shown below in Table 2 Table 2 CentreCOM Micro Repeater Dimensions Model Dimensions AT MR118FT 5 5 in 140 mm x 4 5 in 114 mm x 1 25 in 32 mm AT MR128FT 8 5 in 216 mm x 4 5 in 114 mm x 1 25 in 32 mm TheAT MR 118F T has a separate external power supply Consequently it is smaller enabling you to connect to a hub or a Media A ccess U nit MA U when your physical environment does no
46. t allow space for a larger repeater The CentreCOM Micro R epeaters are both relatively small in size and provide the complete functionality of larger repeaters that contain many ports including packet regeneration and network partitioning Full and Half Repeater Modes TheAT MR 118F T and AT MR 128F T micro repeaters support both full and half repeater modes Y ou can select the appropriate mode required using the full repeater half repeater switch located next to the fiber optic ports F ull repeater modeenables a simple retransmission of signals from the fiber optic port tothe UTP port and vice versa using the P acket R etiming Controller PR C to ensure bit integrity in signal packets The packet regeneration results in a higher performance network by regenerating preamble retiming the data packets and extending collision fragments to ensure collision enforcement by all nodes Half repeater modeaids in reducing the effective repeater count in networks capable of supporting half repeaters T his reduction is achieved by taking advantage of the lower distortion in the fiber optic media The technique is used when a signal is sent from the fiber optic port tothe U TP port therefore repeating occurs in only one direction The half repeater mode is used to reduce the number of repeaters a signal must traverse sothat the four repeater rule restriction is not violated F or example if you are using four repeaters and two of them are set
47. tisch aan elke spanning aan tussen de waarden op het label vermeld ELEKTRISCHE TOESTELLEN VAN KLASSE 1 DIT TOESTEL MOET GEAARD WORDEN De stekker moet aangesloten zign op een juist geaarde contactdoos E en onjuist geaarde contactdoos E en onjuist geaarde contactdoos kan de metalen onderdelen onderdelen waarmee de gebruiker eventueel in aanraking komt onder gevaarlijke spanning stellen ELEKTRISCHE SNOEREN Gebruik een elektrisch snoer maximum 4 5 meter lang berekend voor ten minste 6 amp re 250 V uit HAR vervaardigd met aan het ene uiteinde een gevormde I E C 320 stekker en aan het andere uiteinde een stekker die goedgekeurd is door het land waar het toestel zal worden gebruikt WAARSCHUWINGEN De ventilatiegaten mogen niet worden gesperd en moeten de omgevingslucht ongehinderd toelaten voor afkoeling BEDRIJ FSTEMPERATUUR De omgevingstemperatuur voor dit produkt mag niet meer bedragen dan 50 graden Celsius ALLE LANDEN het toestel installeren overeenkomstig de lokale en nationale elektrische voorschriften vi ENERGIE RAYONNEE Ce mat riel a t test et est certifi conforme la r glementation am ricaine aux normes d finies pour les appareils de classe A SECURITE INFORMATION SUR L ELECTRICITE AVERTISSEMENT DANGER D ELECTROCUTION Pour emp cher les dangers d E LE CTR OCUTION ne pas enlever le couvercle L quipement ne contient aucun l ment r parable par l utilisateur C et appareil comprend d
48. trischen V orschriften entsprechen STR LINGSENERGI Dette kommercielle produkt opfylder de krav der i USA stilles til udstyr af Klasse A SIKKERHED ADVARSEL ELEKTRISK FORH OLDSREGLER RISIKO FOR ELEKTRISK ST D RISIKO FOR ELEKTRISK ST D F or at forebygge ELEKTRISK st d undlad at bne apparatet Der er ingen indre dele der kan repareres af brugeren Denne enhed indeholder LIVSFARLIGE STR MSP NDINGER og b r kun bnes af en uddannet og kvalificeret tekniker For at undg risiko for ELEKTRISK ST D afbrydes den elektriske str m til produktet f r LAN kablerne monteres eller afmonteres FARE UNDER UVEJR N FARE UNDLAD at arbejde pa udstyr eller KABLER i perioder med ADVARSEL DEN STR MF RENDE LEDNINGBRUGESTIL AT AFBRYDE STR MMEN SKAL STR MMEN TIL APPARATET AFBRY DES tages ledningen ud af stikket INSTALLATION ELEKTRISK AUTOMATISK SPAENDINGSREGULERING Dette apparat vil automatisk tilpasse sig enhver sp nding indenfor de v rdier der er angivet p etiketten ELEKTRISK KLASSE 1 UDSTYR DETTE UDSTYR KRAEVER J ORDFORBINDELSE Stikket skal v re forbundet med en korrekt installeret jordforbunden stikkontakt E n ukorrekt installeret stikkontakt kan s tte livsfarlig sp nding til tilg ngelige metaldele gt ELEKTRISK LEDNING Anvend ledning af maksimum 4 5 meters leengde med en kapacitet p minimum 6 amp 250 v best ende af en E C 320 connector med indst bt HAR ledning i de
49. varies with the duty cycle and N packet rate 5 Determine that the losses in the fiber optic cable transmit and receive fibers are within the flux budget of the micro repeater This task requires a fiber optic power meter to measure the actual loss on the fiber optic link cable To be within IEEE specifications the measurement must be at least 32 5 db The fiber optic cable must be 50 125 62 5 125 or 100 125 micron multimode fiber The maximum cable length is 2 000 meters 6 560 ft On a 10BASE T UTP port if the Link indicator is not illuminated or data packet traffic is disrupted With 10BASE T Ethernet most problems are with theUTP wiring 1 Check that the UTP cross over switch is properly set Changing the MDI MDI X switch or swapping cross over to straight Note through cable or vice versato determine which is correct will not cause any harm For repeater to 10B A SE T hub connections use a cross over cable or set the switch to the MDI position For connecting a repeater to a 10BASE T transceiver or N etwork Interface Card NIC use a straight through cable or set the switch to the MDI X position CentreCOM Micro Repeaters 2 Useonly UTP cable designed for use 10BASE T applications 10BA SE T wiring lengths should not exceed 100 meters 328 ft The wiring should be routed away from devices known to emit electromagnetic interference such as fluorescent lights power transformers and relay
50. wisted but are not a pair RJ45 Pin RJ45 Pin TD 1 0 TD TD al 2 TD RD O 3 RD Not Used e XX a Used Not Used 5 5 Not Used re RD RD Not Used go Not Used Not Used EN Not Used Figure 6 Hub to MAU Wiring A Usable and B Unusable Diagram A is correct because the proper pairs are twisted together Diagram B is incorrect because the wires for the receive pair pins 3 and 6 are not twisted together This could result in excessive common mode noise and an unacceptably high data error rate If you pair pins incorrectly for example as shown in F igure 6 Diagram B your network may have a high data error rate straight through cable the transmit pins Land 2 are paired as are the receive pins and 6 I n a cross over cable not shown pins 1 and 2 TD and TD are paired as are pins 6 R D and R D W hen pins 1 and 2 are crossed over they connect to pins 3 and 6respectively and pins 3 and 6 when crossed over connect to pins 1 and 2 respectively See Figure 7 for the location of pin 1 so you can count your pins correctly 21 Data Cabling Techniques On an RJ 45 connector it is important to know where pin Lis so you can count your pins correctly F igure 7 shows the location of pin 1 Pinl Figure 7 Pin 1 Orientation on an RJ45 Connector 10BASE FL FOIRL Ethernet ThelEE
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