Allied Telesyn CentreCOM AT-3012TR AT-3016TR AT-3024TR Multiport Repeaters Installation Manual
Copyright 1995 Allied Telesyn International Corp. All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesyn International. Allied Telesyn 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.
RADIATED ENERGY U.S. Federal Communications Commission Note: This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
MONTAGEANWEISUNGEN VORSICHT: Diese Modelle sind für Betrieb in horizontaler Position entworfen worden. Das Gerät darf NICHT OHNE Gebrauch eines dafür entworfenen Allied Telesyn-Vertikalmontagegestells in VERTIKALER POSITION montiert werden. VORSICHT: Die Entlüftungsöffnungen dürfen nicht versperrt sein und müssen zum Kühlen freien Zugang zur Raumluft haben. VORSICHT: Die Gummifüße NICHT ENTFERNEN, außer bei Gebrauch des Allied Telesyn-Vertikalmontagegestells.
ELEKTRISCHE—SNOEREN Gebruik een elektrisch snoer, maximum 4,5 meter lang, berekend voor ten minste 6 ampère, 250 V, uit HAR vervaardigd, met aan het ene uiteinde een gevormde IEC 320 stekker en aan het andere uiteinde een stekker die goedgekeurd is door het land waar het toestel zal worden gebruikt. MONTAGE-INSTRUCTIES WAARSCHUWING: Deze modellen zijn ontworpen om te werken in HORIZONTALE stand.
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.
FORSIKTIG: STRØMLEDNINGEN BRUKES TIL Å SLÅ APPARATET AV. HVIS DU VIL DEAKTIVISERE UTSTYRET, må du fjerne strømledningen. INSTALLASJON ELEKTRISK—AUTO SPENNINGSTILPASSING Dette produktet vil automatisk bli tilpasset hvilken som helst strøminnstilling i de områdene som vises på etiketten. ELEKTRISKE—TYPE 1. KLASSE UTSTYR DETTE UTSTYRET MÅ JORDES. Strømkontakten må være tilkoplet en korrekt jordet grunnstøpselkontakt.
SEGURIDAD AVISOS ELECTRICOS ADVERTENCIA: PELIGRO DE ELECTROCHOQUE Para evitar un ELECTROCHOQUE, no quite la tapa. No hay ningún componente en el interior al cual puede prestar servicio el usuario. Esta unidad contiene VOLTAJES PELIGROSOS y sólo deberá abrirla un técnico entrenado y calificado. Para evitar la posibilidad de ELECTROCHOQUE desconecte la corriente eléctrica que llega al producto antes de conectar o desconectar los cables LAN.
Table of Contents Electrical Safety and Installation Requirements ................................................... i Chapter 1 Overview ..........................................................................................................................1 CentreCOM AT-30xxTR Multiport Repeaters ........................................................................................... 1 Concepts .........................................................................................................
System Check ............................................................................................................................................ 9 Chapter 3 AT-3012TR Connectivity ............................................................................................. 11 Front Panel Layout....................................................................................................................................... 11 Port Indicators ....................................................
Appendix D CentreCOM AT-30xxTR Manual Feedback Index ........................................................... 37 ...............................................................................................................................
Chapter 1 Overview CentreCOM AT-30xxTR Multiport Repeaters Concepts CentreCOM AT-30xxTR Multiport Repeaters provide low-cost connection for up to 24 IEEE 802.3 10BASE-T network segments. The series includes three different models, featuring 12, 16 and 24 RJ45 port connections for 10BASE-T networks. In addition to the twisted pair interfaces, each unit includes a choice of two network ports for interconnection to a network backbone: ❑ An IEEE 802.
Overview Jabber Lock-up Protection. Jabber lock-up protects the repeater from being overrun with data packets from a possibly defective device. That is, jabber lock-up automatically prevents transmitted data from reaching the repeater if the transmitted data time exceeds a specified duration (in the range of 20 to 150 ms). Features Network diagnostics are provided on the front panel of the AT-30xxTR repeaters, as shown in Figure 1, 2 and 3, to aid in troubleshooting and fault isolation.
AT-30xxTR Multiport Repeater The following checklist highlights the features found on each AT-30xxTR repeater. The remaining chapters of this manual discuss specifics of the port connections, indicators, and switches on each model. ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ ❑ IEEE 802.3 compliant 10BASE-T repeater, Ethernet Version 1.0 and 2.
Overview Testing You should check the Port OK LED for each 10BASE-T port that is being used. ON indicates a valid link. There are two methods for doing this: One method uses a transceiver connection to the AUI port 1. Connect an AT-210T Transceiver to the repeater’s AUI port. Attach one end of a straight-through UTP cable to the transceiver’s 10BASE-T receptacle, and the other end to Port #1; make sure the MDI/MDI-X switch is set to the MDI-X (crossover) setting (see Figure 4).
Chapter 2 Installation Site Requirements Attention Before installing AT-30xxTR repeaters, read the electrical safety and ! installation requirements starting on page i. If the installer is experienced with the AT-30xxTR repeater and does not need detailed installation instructions, refer to Quick Installation Checklist in Chapter 1 of this manual. Ventilation Power Note AT-30xxTR multiport 10BASE-T repeaters have vents on the sides for air circulation.
Installation Table 1: AT-30xxTR Model Types AUI Network Port BNC Network Port Model Number Number of Station Ports Specification AT-3012TR 12 Single bank of two 1x6 units AT-3016TR 16 Single bank of four 1x4 units AT-3024TR 24 Double-stacked; two banks of 1x12 units Each AT-30xxTR repeater has one Attachment Unit Interface (AUI) port to accommodate a 10BASE5 or thick Ethernet connection to the network backbone via a drop cable.
AT-30xxTR Multiport Repeater Network Port Indicators A two-high set of LEDs located between and integrated with the BNC and AUI connectors on the front panel (see Figure 6) indicates which network port connection is in use. The left LEDs light if the BNC port is in use and the right LEDs light if the AUI port is in use (you can use both network ports at the same time, in which case both sets of LEDs will light up).
Installation However, you may want to use one of the 10BASE-T ports to link one hub to another (you can also connect hub to hub via the network port). This type of connection requires the signal to “crossover” so that the TX pin at one end connects to the RX pin at the other end. You can accomplish this in either of two ways: ❑ You can use a special crossover cable, available commercially at most electronic outlets.
AT-30xxTR Multiport Repeater Installation Connections System Check Note 1. Carefully remove the repeater from its packaging materials. Retain the packing materials until satisfactory installation has been achieved. 2. Place the repeater in its operating area. 3. Apply power to the unit by plugging in the power cord. Check that the green Power LED on the front panel lights up. 4.
Chapter 3 AT-3012TR Connectivity Front Panel Layout The AT-3012TR Multiport Repeater has 12 10BASE-T network ports supplied with shielded RJ45 connectors. The front panel layout is shown in Figure 8. 2 3 4 5 6 7 10BASE-T PORT ACTIVITY 8 9 10 11 12 1 2 3 4 5 PORT OK 6 7 8 9 BNC OFF MDI AUI PORT OK 10 11 12 POWER PORT OK ON ACTIVITY MDI-X 1 2 3 6 1 2 3 6 1 2 3 6 STATUS IEEE 802.
AT-3012TR Connectivity PORT OK—This LED indicates that a valid link has been established and the port is not partitioned. RECEIVING—This LED flashes when incoming packets are present on the respective segment.
Chapter 4 AT-3016TR Connectivity Front Panel Layout The AT-3016TR Multiport Repeater has 16 10BASE-T network ports supplied with shielded RJ45 connectors. The front panel layout is shown in Figure 10. 10BASE-T NETWORK PORTS PORT OK 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 AUI 16 PORT OK OFF MDI 1 2 3 6 STATUS POWER PORT OK ON ACTIVITY MDI-X 1 2 3 6 1 2 3 6 IEEE 802.
AT-3016TR Connectivity PORT OK—This LED indicates that a valid link has been established and the port is not partitioned. RECEIVING—This LED flashes when incoming packets are present on the respective segment.
Chapter 5 AT-3024TR Connectivity Front Panel Layout The AT-3024TR Multiport Repeater has 24 10BASE-T network ports supplied with shielded RJ45 connectors. The front panel layout is shown in Figure 12. Note that the ports are double-stacked, in two banks of six ports each. 1 X 3 X 5 X 7 X 9 X 11 X 13 X 15 X 17 X 19 X 21 X 23 10BASE-T NETWORK PORTS 3 5 BNC 7 9 11 13 15 17 19 21 23 AUI PORT OK OFF PORT OK ON STATUS IEEE 802.
AT-3024TR Connectivity 1 X 3 X 5 X 7 X 9 X 11 X 13 X 15 X 17 X 19 X 21 X 23 10BASE-T NETWORK PORTS 3 5 BNC 7 9 11 13 15 17 19 21 23 AUI PORT OK OFF STATUS IEEE 802.
Chapter 6 Troubleshooting 10BASE-T Cabling If the Power LED is not lit ❑ Check your power connections. If the Port OK LED is not lit 1. Check that the device at the opposite end of the UTP link is powered on, and that the cable is properly connected. 2. Check that the proper cable pin-out is used. If another manufacturer’s 10BASE-T device is used on the opposite end of the UTP link, check that it is true 10BASE-T.
Chapter 7 Configurations The illustrations in this chapter provide some examples of possible network configurations using CentreCOM AT-30xxTR Multiport Repeaters. The catalog is not meant to be exhaustive and may or may not fit your network’s requirements. For consistency, the examples show AT-3012TR units, but any combination of the three models may be used interchangeably.
Configurations Coaxial Ethernet (10BASE5) Ethernet Transceiver AUI Cable AUI PORT 2 3 4 5 6 7 10BASE-T PORT ACTIVITY 8 9 10 11 12 1 2 3 4 5 PORT OK 6 7 8 9 BNC MDI STATUS POWER PORT OK ON OFF 1 2 3 6 AUI PORT OK 10 11 12 ACTIVITY MDI-X 1 2 3 6 1 2 3 6 IEEE 802.
AT-30xxTR Multiport Repeater BNC Bus Bussing of the AT-30xxTR multiport repeater is another possibility. You can accommodate more nodes on your network if you connect the repeaters through the BNC network port. Note that the worst case, node to node, is through only two repeaters; one provides the UTP station linkage to thinnet, and the second repeater connects thinnet through the BNC bus to the AUI cable.
Appendix A Data Cabling Techniques The following sections detail cabling techniques and port specifications for IEEE 802.3 media. For comprehensive treatment of these topics, refer to the original IEEE specification. 10BASE-T UTP (RJ45) links support transmissions up to 100 meters (328 ft.) at 10 Megabit data rates. A serious problem exists concerning identification of modular cable. There are various grades of voice-quality and data-quality cables available.
Data Cabling Techniques Table 2 shows the five common modular cable specifications and their applicability to 10BASE-T network use.
AT-30xxTR Multiport Repeaters Pin 1 Figure 19: RJ45 Cable UTP MAU-to-MAU, Hub-to-Hub Wiring 10BASE-T MAU-to-MAU or hub-to-hub wiring generally requires a crossover cable located somewhere along the UTP cable run. This may commonly occur at the punch-down block or between the RJ45 wall receptacle and the workstation. See Figure 20.
Data Cabling Techniques Table 3 shows which position the straight-through/crossover selection switch needs to be for the device configuration shown. Table 3: MDI and MDI-X Switch Settings for Common Connection1 Model Connected to MDI MDI-X AT-30xxTR Hub X AT-30xxTR RJ45 Transceiver X AT-30xxTR NIC X 1. This table assumes a straight-through cable is being used. The switch setting are the opposite of what is shown if a crossover cable is being used.
AT-30xxTR Multiport Repeaters If you pair pins incorrectly, for example as shown in Figure 21, Diagram B, your network may have a high data error rate. In a straight-through cable, the transmit pins, 1 and 2, are paired, as are the receive pins, 3 and 6. In a crossover cable (Figure 20), pins 1 and 2, TD+ and TD-, are paired, as are pins 3 and 6, RD+ and RD-.
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-FL—IEEE 802.
Glossary BAYONET NUT COUPLE (BNC) CONNECTOR—A 10BASE2 thin coax connector with push-on BNC locking lug that quickly locks into place with a half twist. BIT RATE (BR)—The rate of data throughput on the medium in bits per second. Ethernet specifies 10 million bits per second. BIT TIME—The duration of one bit symbol (1/BR). Ethernet specifies a bit time of 100 ns. CARRIER SENSE—In a LAN, an ongoing activity of a data station to detect whether another station is transmitting.
AT-30xxTR Multiport Repeaters 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-pin Telco connection to RJ45 connections. See AT-Adapt-2. HEARTBEAT—See SQE HOT SWAPPING— The process of replacing a hub module without bringing down the network.
Glossary MANAGED MODULE— An intelligent repeater in a department concentrator chassis that makes management data available to the Master. MANAGEMENT AGENT—Software that is used to view hub activity and set hub variables. MASTER—A repeater in the topmost position in a department concentrator chassis that contains and downloads the management agent software to Backup and Slaves. The Master contains the only active image of the management agent and controls the management functions of the Backup and Slaves.
AT-30xxTR Multiport Repeaters 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 specific propagation delay maxima for computing propagation budgets when designing a LAN. Cable length plays a major role in propagation delay; for example, a 50-meter (164-ft.) AUI cable has a maximum allowable propagation delay of 257 ns.
Glossary TCP/IP PROTOCOLS—A set of protocols for intercomputer communication, including network level (Internet Protocol), transport level (Transmission Control Protocol or TCP) and application level protocols (for example, Telnet terminal emulation). TCP/IP has been used for many years in two country-wide networks, the ARPANET and MILNET. Recently, TCP/IP has become very popular with users of a variety of multi-user computer systems and engineering workstations.
Appendix C Technical Support Fax Order Name ___________________________________________________________________ Company ________________________________________________________________ Address _________________________________________________________________ City ____________________State/Province____________ Zip/PostalCode __________ Country _________________ Phone __________________Fax ____________________ Incident Summary Model number of Allied Telesyn product I am using _____________________________
Appendix D CentreCOM AT-30xxTR 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. 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.
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) 2-38093-448
Index Numerics 10BASE5 (thick) AUI drop cables 27 10BASE-T MDI/MDI-X switch 25 UTP hub-to-MAU wiring 24 UTP MAU-to-MAU, hub-to-hub wiring 25 A Activity LED 6 adapters AT-ADAPT-2 29 harmonica 31 Telco 50-pin/RJ45 31 applying power 9 AT-3012TR front panel 11 AT-3016TR front panel 13 AT-3024TR front panel 15 Attachment Unit Interface 1, 6 Attachment Unit Interface (AUI) 29 AUI 27 AUI drop specification 27 AUI port 6 auto partitioning 1 B baseband coaxial system 29 bit rate 30 bit time 30 BNC Network Port 6
Index DIX 31 D-sub 30 N-series 32 RJ45 7, 23, 24, 29, 31, 33 crossover cable 8 L LAN 30 link integrity 1 link segment 31 M D Data Communication Equipment (DCE) 30 Data Communications Equipment (DCE) 24 Data Terminal Equipment (DTE) 30 department concentrator 29, 30 diagnostics 2 DTE 24, 27, 29 E Ethernet 27, 29 external transceiver 9 F features 3 fiber optic 29 front panel, AT-3012TR 11 front panel, AT-3016TR 13 front panel, AT-3024TR 15 G managed module 32 management agent 32, 33 management agent 32
Index retiming 1 S segmentation 1 Signal Quality Error (SQE) 9, 33 Simple Network Management Protocol (SNMP) 33 site requirements 5 SQE test 33 Station Port Status indicators 7 station ports 5 straight-through cable 8 system check 9 T TCP/IP protocols 34 Telco connector 34 Termination Switch 7 testing 4 transceiver 1, 4, 9 U unmanaged module 34 Unshieled Twisted Pair (UTP) 34 UTP 29 UTP cable 17 V ventilation 5 W wiring 7, 8, 23, 24, 25, 26, 27, 29, 30, 31, 33 AUI drop, specification 27 house wiring
