CentreCOM ® AT-MR908TX Standalone/Stackable Hubs Installation Manual
Copyright 1996 Allied Telesyn International Corp. All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesyn International Corp. Allied Telesyn International Corp. reserves the right to make changes in specifications and other information contained in this document without prior written notice. The information provided herein is subject to change without notice. In no event shall Allied Telesyn International Corp.
Electrical Safety and Installation Requirements U.S. Federal Communications Commission RADIATED ENERGY Note: This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
CAUTION: POWER CORD IS USED AS A DISCONNECTION DEVICE. TO DE-ENERGISE EQUIPMENT disconnect the power cord. INSTALLATION ELECTRICAL—AUTO VOLTAGE ADJUSTMENT This product will automatically adjust to any voltage between the ranges shown on the label. ELECTRICAL—TYPE CLASS 1 EQUIPMENT THIS EQUIPMENT MUST BE EARTHED. Power plug must be connected to a properly wired earth ground socket outlet. An improperly wired socket outlet could place hazardous voltages on accessible metal parts.
INSTALLATION AUTOMATISCHE SPANNUNGSEINSTELLUNG Dieses Gerät stellt sich automatisch auf die auf dem Etikett aufgeführten Spannungswerte ein. GERÄTE DER KLASSE 1 DIESE GERÄTE MÜSSEN GEERDET SEIN. Der Netzstecker darf nur mit einer vorschriftsmäßig geerdeten Steckdose verbunden werden. Ein unvorschriftsmäßiger Anschluß kann die Metallteile des Gehauses unter gefährliche elektrische Spannungen setzen.
INSTALLATION ELEKTRISK—AUTOMATISK SPÆNDINGSREGULERING Dette apparat vil automatisk tilpasse sig enhver spænding indenfor de værdier, der er angivet på etiketten. ELEKTRISK—KLASSE 1-UDSTYR DETTE UDSTYR KRÆVER JORDFORBINDELSE. Stikket skal være forbundet med en korrekt installeret jordforbunden stikkontakt. En ukorrekt installeret stikkontakt kan sætte livsfarlig spænding til tilgængelige metaldele. ELEKTRISK—LEDNING Anvend ledning af maksimum 4,5 meters længde, med en kapacitet på minimum 6 amp.
INSTALLATIE ELEKTRISCH: AUTOMATISCHE AANPASSING VAN DE SPANNING Dit toestel past zich automatisch aan elke spanning aan, tussen de op het label vermelde waarden. ELEKTRISCHE TOESTELLEN VAN KLASSE 1 DIT TOESTEL MOET GEAARD WORDEN. De stekker moet aangesloten zijn op een juist geaarde contactdoos. Een onjuist geaarde contactdoos kan de metalen onderdelen waarmee de gebruiker eventueel in aanraking komt onder gevaarlijke spanning stellen.
INSTALLATION RÉGLAGE DE TENSION AUTOMATIQUE ÉLECTRIQUE Ce matériel peut s’ajuster automatiquement sur n’importe quelle tension comprise dans la plage indiquée sur l’étiquette. ÉQUIPEMENT DE CLASSE 1 ÉLECTRIQUE CE MATÉRIEL DOIT ÊTRE MIS A LA TERRE. La prise de courant doit être branchée dans une prise femelle correctement mise à la terre car des tensions dangereuses risqueraient d’atteindre les pièces métalliques accessibles à l’utilisateur.
ASENNUS SÄHKÖ—AUTOMAATTINEN JÄNNITTEENSÄÄTÖ Tämä tuote säätää automaattisesti mihin tahansa jännitteeseen ohjetarrassa annettujen arvojen välillä. SÄHKÖ—TYYPPILUOKAN 1 LAITTEET TÄMÄ LAITE TÄYTYY MAADOITTAA. Pistoke täytyy liittää kunnollisesti maadoitettuun pistorasiaan. Virheellisesti johdotettu pistorasia voi altistaa metalliosat vaarallisille jännitteille.
INSTALLAZIONE ELETTRICITÀ—REGOLAZIONE AUTOMATICA DELLA TENSIONE Questo prodotto regolerà automaticamente la tensione ad un valore compreso nella gamma indicata sull’etichetta. ELETTRICITÀ—DISPOSITIVI DI CLASSE 1 QUESTO DISPOSITIVO DEVE AVERE LA MESSA A TERRA. La spina deve essere inserita in una presa di corrente specificamente dotata di messa a terra. Una presa non cablata in maniera corretta rischia di scaricare una tensione pericolosa su parti metalliche accessibili.
INSTALLASJON ELEKTRISK—AUTO SPENNINGSTILPASNING Dette produktet vil automatisk bli tilpasset hvilken som helst strømspenning i de områdene som vises på etiketten. ELEKTRISK—TYPE 1- KLASSE UTSTYR DETTE UTSTYRET MÅ JORDES. Strømkontakten må være tilkoplet en korrekt jordet kontakt. En kontakt som ikke er korrekt jordet kan føre til farlig spenninger i lett t ilgjengelige metalldeler. ELEKTRISK—MEDDELELSE OM LEDNINGER Bruk en strømledning av maksimalt 4.5 m.
INSTALAÇÃO ELÉTRICO—AJUSTE AUTOMÁTICO DE VOLTAGEM Este produto ajustar-se-á automaticamente a qualquer voltagem que esteja dentro dos limites indicados no rótulo. ELÉTRICO—EQUIPAMENTOS DO TIPO CLASSE 1 DEVE SER FEITA LIGAÇÃO DE FIO TERRA PARA ESTE EQUIPAMENTO. O plugue de alimentação deve ser conectado a uma tomada com adequada ligação de fio terra. Tomadas sem adequada ligação de fio terra podem transmitir voltagens perigosas a peças metálicas expostas.
INSTALACION ELECTRICO—AUTO-AJUSTE DE TENSION Este producto se ajustará automáticamente a cualquier tensión entre los valores máximos y mínimos indicados en la etiqueta. ELECTRICO—EQUIPO DEL TIPO CLASE 1 ESTE EQUIPO TIENE QUE TENER CONEXION A TIERRA. El cable tiene que conectarse a un enchufe a tierra debidamente instalado. Un enchufe que no está correctamente instalado podría ocasionar tensiones peligrosas en las partes metálicas que están expuestas.
ELEKTRISKT—TYP KLASS 1 UTRUSTNING DENNA UTRUSTNING MÅSTE VARA JORDAD. Nätkabeln måste vara ansluten till ett ordentligt jordat uttag. Ett felaktigt uttag kan göra att närliggande metalldelar utsätts för högspänning. Apparaten skall anslutas till jordat uttag, när den ansluts till ett nätverk.
Table of Contents Electrical Safety and Installation Requirements . . . . . . . . . . . . . . . . . . . i Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii Document Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xviii Contacting ATI Technical Support . . . . . . . . . . . . . . . . . . . . . .
Chapter 3 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Connectivity Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Is the unit receiving power? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Is the Link/Activity LED illuminated? . . . . . . . . . . . . . . . .
About This Manual This manual is written for system administrators who are responsible for configuring, monitoring, and maintaining a Local Area Network (LAN) of which Allied Telesyn’s AT-MR908TX hubs are components. The contents of each chapter are described below: ❑ Chapter 1, “Product Description,” gives an overview of the features, package contents, connections and LED Status Indicators of the Standalone/Stackable AT-MR908TX hub.
About This Manual Document Conventions The following conventions are used in presenting information in this manual: Note A note provides additional information or describes the possible consequence of a specific action you can perform.
AT-MR908TX Hub Installation Manual Bulletin Board Services A bulletin board is available. The number is: 206-483-7979 Modem settings for the bulletin board are: 8 bits; no parity; 1 stop bit. The process is straightforward: Once the BBS is accessed, it requests that you register either as a new user or as a current user. It then provides instructions on the various features and functions available. This is followed by a list and description of all available technical notes and files that can be downloaded.
Chapter 1 Product Description Overview The AT-MR908TX hub is an economical and reliable Fast Ethernet 100 Megabits per second (Mbps) device with eight (8) 100BASE-TX ports. A MDI/MDI-X slide switch on the back panel lets you select Port 1 to cascade two hubs together for network expansion. Network Cascade Expansion. Network expansion means that any two hubs may be cascaded through Port 1 of one hub in one stack to any port (other than Port 1) on any hub in a second stack.
Product Description Features AT-MR908TX Standalone/Stackable hubs incorporate the following features: ❑ Compliance with IEEE 802.
AT-MR908TX Installation Manual Product Models Six different models of the AT-MR908TX hub are available, depending on voltage, power cords, and configuration options. Table 1 on page 3 details the six model types. Table 1: AT-MR908TX Model Types Model Number Configuration Voltage/Power Cord Requirement AT-MR908TX-10A Standalone 100-120 VAC; power cord for U.S. AT-MR908TX-19A Stackable 100-120 VAC; power cord for U.S.
Product Description Light-emitting Diodes (LEDs) Figure 2 shows the location of the LEDs on the front panel. This faceplate is common to all AT-MR908TX models.
AT-MR908TX Installation Manual Table 2 details the purpose, color, and functional description of each LED.
Product Description Stackable/Cascade Hub. An AT-MR901 stacking module, cable, and brackets are used to stack two or more hubs together. Installed in the back panel of the AT-MR908TX-19A, AT-MR908TX-29A or AT-MR908TX-39A, the module enables you to stack up to six (6) units. The stacking port provides full interhub connectivity. Figure 4 shows the back panel with the AT-MR901 stacking module installed.
Chapter 2 Installation Site Requirements Ventilation. All AT-MR908TX hubs have an internal fan and openings on both sides for ventilation. Note Make sure the ventilation openings on the unit are not blocked. Maximum ambient operating temperature is 122° F (50° C). Maximum ambient storage temperature is from 14° F to 158° F (-10° C to 70° C). Power. AT-MR908TX hubs have an internal universal power supply rated at 100 to 240 VAC, 50/60 Hz.
Installation Network Specifications Table 3 provides an overview of IEEE 802.3 and 802.3u specifications for 10BASE-T and 100BASE-TX network configurations using twisted-pair wiring. Table 3: IEEE 802.3 and 802.
AT-MR908TX Installation Manual The six common modular cable specifications and their applicability to 100BASE-TX networks are shown in Table 4.
Installation The following models incorporate ATI’s AT-MR901 stacking module. This module enables you to stack up to six units such that they appear to be a single logical hub within a single Ethernet collision domain: ❑ AT-MR908TX-19A ❑ AT-MR908TX-29A ❑ AT-MR908TX-39A Standalone Installation In a standalone configuration, the AT-MR908TX hub supports up to a maximum of eight network nodes, as shown in Figure 5.
AT-MR908TX Installation Manual 2. Remove all equipment from the packing box and store the box and packing materials in a safe place. That is, the unit may need to be transferred in the future. 3. Insert the female end of the power cord into the Power Receptacle on the back of the unit. 4. Insert the male end of the power cord into an electrical output of the appropriate power. 5. Check the front panel of the hub to make sure the green power (PWR) LED is illuminated. 6.
Installation Cascading With Fast Ethernet Two AT-MR908TX hubs can be cascaded to enable support for up to a maximum of 14 network port connections. The Two-Repeater Rule. Because of the Two Repeater Rule for IEEE 802.3u, the maximum number of Class II hubs allowed in a cascaded configuration is two. That is, the IEEE 802.
AT-MR908TX Installation Manual 1. Make sure the package includes all of the required parts, including: AT-MR908TX hub Power cord Warranty card This installation manual 2. Make sure you have the correct cables for the connection between cascaded hubs as well as between the network ports on each hub and the attached devices. 3.
Installation Collision Domain Diameters A summary of the collision Domain Diameters is in Table 5: Table 5: Collision Domain Diameters per IEEE Standard 802.3u Model All Copper All Fiber T4 and Fiber TX and Fiber DTE to DTE 100m 412m na na 1 Class I Repeater 200m 272m 231m* 260.8m* 1 Class II Repeater 200m 320m 304m* 308.8m* 2 Class II repeaters 205m 228m 236.3m** 216.
AT-MR908TX Installation Manual Stacked Installation AT-MR908TX-19A, AT-MR908TX-29A and AT-MR908TX-39A models are designed to operate together with other similar models in a stacked hub configuration. In this configuration, all hubs in the stack logically appear to your network as a single hub and will, subsequently, support up to 48 network nodes.
Installation AT-MR901 Stacking Module. An AT-MR901 Stacking Module upgrade package includes the following: AT-MR901 Stacking module SCSI II Stacking cable Stacking brackets and screws 1. Ensure that your AT-MR908TX is not connected to a power source. Note Electrostatic Discharge Precautions. Static electricity can damage electronic components of a computer or optional equipment.
AT-MR908TX Installation Manual 4. Secure the stacking module in place with the four screws you removed in Step 2 above. Chassis or Stacking Brackets. You are now ready to connect the AT-MR908TX hub with another ATMR908TX hub using the SCSI II Stacking cable. Use the following procedures to connect multiple AT-MR908TX units in a stacked hub configuration: 1. In a chassis, place up to six AT-MR908TX hubs such that the uplink ports on the back panel of the units align.
Installation 8. Plug all 100BASE-TX cables in the 100BASE-TX network ports (RJ-45 connectors) on the back panel of each unit. You are now ready to operate your 100BASE-TX network in a stacked hub configuration. Stacked/Cascaded Installation First, recall that the basic 803.2u rule is that, for cascading Fast Ethernet networks, the maximum number of Class II repeaters in the data path between any two nodes cannot exceed two.
AT-MR908TX Installation Manual Second, you are referred to the information previously presented on cascading. This process will, in turn, allow you to electronically combine the two separate stacks of hubs into a single network or collision domain. Combining this information will result in a stacked/cascaded installation as shown in Figure 11. For simplicity, only two hubs are shown in each stack.
Chapter 3 Troubleshooting Connectivity Testing Follow the steps outlined below to test for a valid connection as well as to confirm the correct operation of the network. 1. Connect port 1 and port 2 of a single AT-MR908TX to two nodes or workstations and turn on the hub power supply by connecting the AC power cord. 2. Check to make sure the Link/Activity LEDs of both port 1 and port 2 are illuminated. 3.
Troubleshooting Troubleshooting Is the unit receiving power?Check the power (PWR) LED on the front of the AT-MR908TX. This green LED should be illuminated. If the power LED is not on, check both ends of the AC power cord. Make sure the power cord is plugged into a functioning wall outlet and that it is properly inserted into the AT-MR908TX power receptacle on the back of the unit. Note There is no “power” switch on the AT-MR980TX. If the power cord is properly connected, the hub should be receiving power.
AT-MR908TX Installation Manual — When Port 1 of the AT-MR908TX is not connected to another hub but is used to connect to a workstation or other equipment, you should set the MDI/MDI-X slide switch to MDI-X. 4. Problem 4: There is signal loss between the hub and one of the attached network nodes. ❑ Solution 4: — Make sure the distance between the hub and the connected network device is no greater than 100 meters. — Make sure you are using Category 5 cable.
Appendix A AT-MR908TX Specifications Physical Characteristics Dimensions: 14.2” x 6.7” x 1.8” Operating temperatures: 0° to 50° C Storage temperatures: -10° to 70° C Relative humidity: 5% to 80% (non-condensing) Operating altitude: Up to 10,000 ft. Desktop mounting: 4 ea. adhesive plastic feet attached to the bottom of the hub Note You must remove the center pin in each foot before you are able to remove the foot itself.
AT-MR908TX Specifications Low chipset latency delay for: ❑ Cascade uplink through one RJ-45 port with MDI/MDI-X crossover switch ❑ Stackable backplane expansion Front-panel LEDS for performance monitoring or failure diagnostics: ❑ 1 system status LED — Power On/Off — Collision detection ❑ 5 network status LEDs for utilization display without management software ❑ 8 Link/Activity and Error LEDs, one for each RJ-45 port Back-panel connectors: ❑ 8 shielded RJ-45 connectors ❑ Cascade port and M
AT-MR908TX Installation Manual Product Models Six different models of the AT-MR908TX hub are available, depending on voltage, power cords, and configuration options. Table 6 details the six model types. Table 6: AT-MR908TX Models Model Number Configuration Voltage/Power Cord Requirement AT-MR908TX-10A Standalone 100-120 VAC; power cord for U.S. AT-MR908TX-19A Stackable 100-120 VAC; power cord for U.S.
AT-MR908TX Specifications 100BASE-TX Connector Pinouts Straight-through Cable 1 2 3 4 5 6 7 8 TX+ TXRX+ RX- RX+ 1 RX- 2 TX+ 3 4 5 TX- 6 7 8 Crossover Cable 1 2 3 4 5 6 7 8 28 TX+ TXRX+ RX- RX+ 1 RX- 2 TX+ 3 4 5 TX- 6 7 8
Appendix B Glossary 10BASE2—Also called thin Ethernet, thinnet or CheaperNet, a 10 MHz baseband specification. Cable impedance is 50 Ω and maximum coaxial segment length is 185 meters (607 ft.). 10BASE5—Also called thick Ethernet, a 10 MHz baseband specification. Cable impedance is 50 Ω and maximum coaxial segment is 500 meters (1,640 ft.). The cable is commonly referred to as yellow cable. Thick Ethernet cable is typically used as a trunk or backbone path of the network. 10BASE-T—IEEE 802.3 UTP Ethernet.
Glossary CARRIER SENSE—In a LAN, an ongoing activity of a data station to detect whether another station is transmitting. CARRIER SENSE MULTIPLE ACCESS with COLLISION DETECT (CSMA/ CD)—This is the access method employed by IEEE 802.3 LAN transceivers, by which multiple stations compete for use of the transmission 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.
AT-MR908TX Installation Manual 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. HUB/REPEATER—A hub is a central signal distributor.
Glossary MEDIUM DEPENDENT INTERFACE (MDI)—The mechanical and electrical interface between a hub and a transceiver (MAU). MDI-X is another version of the interface that enables hubs to connect using different pin-outs, thereby avoiding conflicts that occur when receiving and transmitting packets use the same pin-out. N-SERIES—A barrel shaped, threaded connector used on 10BASE5 (thick Ethernet) coaxial cable. PATCH PANEL—A 10BASE-T patch panel may be used between a punch-down block and UTP workstation.
AT-MR908TX Installation Manual THIN ETHERNET—See 10BASE2 TRUNK CABLE—The coaxial cable used to distribute signals over long distances throughout a cable system. UNSHIELDED TWISTED PAIR (UTP)—A cable used in 10BASE-T and 100BASE-T wiring that consists of at least two twisted pairs of 22 to 26 AWG wire. The pairs should have at least 3 twists per foot and have an impedance of 100 Ω. Level 3, Level 4 and Level 5 UTP cables fit these criteria.
Appendix C Technical Support Fax Order Name__________________________________________________________________ Company _______________________________________________________________ Address ________________________________________________________________ City ________________________ State/Province _______________________________ Zip/Postal Code ___________________ Country _______________________________ Phone _______________________________ Fax _______________________________ Incident Summary Model numb
Appendix D CentreCOM AT-MR908TX 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, answer the questions and fax or mail this form back to Allied Telesyn International Corp. 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.
Appendix E Where To Find Us For Technical Support or Service Location Phone Fax North America United States, Canada, Mexico, Central America, South America, Australia, New Zealand 1 (800) 428-4835 1 (206) 481-3790 France France, Belgium, Luxembourg, The Netherlands, Middle East, Africa (+33) 1-69-28-16-17 (+33) 1-69-28-37-49 Germany Germany, Switzerland, Austria, Eastern Europe (+01) 30-83-56-66 (+49) 30-435-70-650 Italy Italy, Spain, Portugal, Greece, Turkey, Israel (+39) 2-38093-444 (+39) 2
Where To Find Us For Sales Information United States Canada Lilburn, GA Tel: (404) 717-0290, Fax: (404) 717-0806 Salt Lake City, UT Tel: (801) 350-9130, Fax: (801) 350-9051 Vienna, VA Tel: (703) 506-0196, Fax: (703) 506-1986 Chicago, IL Tel: (708) 406-8431, Fax: (708) 406-8462 Austin, TX Tel: (512) 281-6378, Fax: (512) 261-6379 Dallas, TX Tel: (214) 446-9873, Fax: (214) 446-8555 Sugar Land, TX Tel: (713) 265-8389, Fax: (713) 265-8386 Reading, MA Tel & Fax: (617) 944-3492 St.
Appendix F Index A AT-MR901 Stacking Module 16 Auto-partitioning 2 B back panel 6 C cabling 10BASE-T 27 cabling specifications 8, 26 cascading 2, 12 Class II compliance 2 collision domain 14 compatability 2 contacting ATI xviii bulletin board services xix CompuServe xix internet mail xix manual feedback 37 phone numbers xviii technical support fax order 35 where to find us 39 world wide web xix D document conventions xviii E electrical and mechanical features 25 Error LEDs 4 H hub-to-workstation 2 I IEEE
Index V valid connection 21 ventilation 7 Voltage/Power Cord Requirement 3, 27 W Warranty 2 wiring 27 42
