CentreCOM ® AT-MR415T AT-MR815T Multiport 10Base-T Micro Repeaters Installation Guide PN 613-10685-00 Rev A
Copyright 1997 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 DECLARATION OF CONFORMITY Manufacturers Name: Manufacturers Address: Allied Telesyn International 950 Kifer Road Sunnyvale, CA 94086 USA Manufacturers Telephone: Declares that the product: Model Numbers: 408-730-0950 Multiport Ethernet Hub unit AT-MR415T and AT-MR815T Complies with FCC Part 15B, Class B Limits: This device complies with part 15 of the FCC Rules.
Electrical Safety and Installation Requirements STANDARDS: This product meets the following standards RFI Emission EN55022 Class B Immunity EN50082-1 SAFETY Power to the hub must be sourced only from the adapter. AUSTRALIA Use a safety approved AC adapter of DC 7.5V to 12V, min 500mA EUROPE - EC Use TÜV licensed AC adapter of DC 7.5V, 500mA. USA/CANADA Use a UL Listed/CSA Certified AC adapter of DC 7.5V, 500mA.
AT-MR415T and AT-MR815T Installation Guide Radiofrekvens forstyrrelsesemission EN55022 Klasse B Immunitet EN50082-1 SIKKERHED Strømforsyningen til apparatet må udelukkende tages fra tilpasningstransformatoren. EUROPE - EC Brug kun TÜV godkendt vekselstrømstransformator på 7.5 V jævnstrøm, 500 mA. FARE UNDER UVEJR FARE: UNDLAD at arbejde på udstyr eller KABLER i perioder med LYNAKTIVITET. Tilslut ikke telefonledninger til signalstikforbindelsen.
Electrical Safety and Installation Requirements Radioaaltojen häirintä EN55022 Luokka B Kestävyys EN50082-1 TURVALLISUUS Tähtipisteeseen (hub) syötettävän virran pitää tulla ainoastaan sovittimesta. EUROPE - EC Käytä TÜV-lisenssillä valmistettua verkkosovitinta, jonka tasajännitteen nimellisarvot ovat DC 7,5 V, 500 mA (milliampeeria). SALAMANISKUVAARA HENGENVAARA: ÄLÄ TYÖSKENTELE laitteiden tai KAAPELEIDEN KANSSA SALAMOINNIN AIKANA. Älä liitä puhelinlinjaa signaalin liittimeen.
AT-MR415T and AT-MR815T Installation Guide Emissão de interferência de radiofrequência EN55022 Classe B Imunidade EN50082-1 SEGURANÇA Use somente o adaptador fornecido para alimentação elétrica do hub. EUROPE - EC Use um adaptador de corrente alternada com saída DC de 7,5V e 500mA em conformidade com as especificações da TÜV. PERIGO DE CHOQUE CAUSADO POR RAIO PERIGO: NÃO TRABALHE no equipamento ou nos CABOS durante períodos suscetíveis a QUEDAS DE RAIO.
Table of Contents Electrical Safety and Installation Requirements .................................. iii Chapter 1 Product Description .......................................................................................1 Overview ..............................................................................................................1 Features ...............................................................................................................1 Package Contents ...........................
Table of Contents Chapter 3 Troubleshooting ........................................................................................... 19 Performing a Connection Test ......................................................................... 19 Troubleshooting ................................................................................................ 20 Is The Unit Receiving Power?................................................................... 20 Is The Link On Lamp Lighted? ......................
Chapter 1 Product Description Overview Welcome to Allied Telesyn International! Allied Telesyn’s AT-MR415T/AT-MR815T Micro Repeaters represent a compact, inexpensive solution for Local Area Network (LAN) applications. AT-MR415T/AT-MR815T Micro Repeaters combine 10 Mbps of 10Base-T Ethernet connectivity with the same features and functionality of larger, more expensive repeaters.
Product Description Package Contents The parts included with this product are listed below. Please check the equipment you received to make sure you have everything. Note that a correction or addendum may be included in the package. ❑ An AT-MR415T or AT-MR815T Micro Repeater ❑ One direct plug in type approved adapter rated 7.
AT-MR415T and AT-MR815T Installation Guide Jabber Lock-up Protection Jabber lock-up protects the repeater from being overrun with data packets. It does this by isolating those segments with transmitted packets that exceed the maximum packet length. That is, jabber lock-up automatically prevents transmitted data from reaching the repeater if the transmitted data time exceeds a specified duration (usually 5 ms). AT-MR415T Figure 1 shows the front panel of an AT-MR415T.
Product Description ❑ ACTIVITY lamp (green) — This LED is lighted when packets are being sent or received through the repeater. ❑ COLLISION lamp (amber) — The COLLISION LED will flicker to indicate a collision. While occasional collisions are normal in Ethernet networks, a constantly illuminated COLLISION LED may indicate that there is a port with excessive traffic problems. — Continual flickering of the COLLISION LED may also indicate excessive frame collisions on a segment.
AT-MR415T and AT-MR815T Installation Guide ❑ MDI MDI-X Toggle Switch — This switch allows you to set the cascade port (the port directly to the right of this switch). This cascade port, in turn, can be used to either connect to another repeater or as a normal 10Base-T port. The switch positions are as follows: MDI (left position). This port can now be used to cascade to another repeater. MDI-X (right position). Use this port as a normal 10Base-T port.
Product Description In other words, the LED is lighted anytime a valid communications link has been established for the corresponding port. If the LED is not lighted, check the twisted pair cable to ensure a proper port connection has been made. ❑ ACTIVITY lamp (green) — This LED is lighted when packets are being sent or received through the repeater. ❑ COLLISION lamp (amber) — The COLLISION LED will flicker to indicate a collision.
AT-MR415T and AT-MR815T Installation Guide ❑ MDI MDI-X Toggle Switch — This switch allows you to set the cascade port (the port directly to the right of this switch). The cascade port, in turn, can be used to either connect to another repeater or as a normal 10Base-T port. The switch positions are as follows: MDI (left position). This port can now be used to cascade to another repeater MDI-X (right position).
Chapter 2 Installation Site Requirements Ventilation AT-MR415T/AT-MR815T Micro Repeaters have openings on both sides for ventilation. Although these Micro Repeaters do not require an internal fan to aid in cooling, adequate ventilation is required. Ensure that the ventilation openings located on the sides of the chassis are never blocked. Note Maximum ambient temperature is 104o F (40o C).
Installation Table 1 shows the model variations and different power arrangements for AT-MR415T/AT-MR815T Micro Repeaters: Table 1: Model Configurations Model Location Voltage AT-MR415T-10 North America 90/120 VAC AT-MR815T-10 North America 90/120 VAC AT-MR415T-20 Europe/Asia 200/240 VAC AT-MR815T-20 Europe/Asia 200/240 VAC AT-MR415T-30 United Kingdom 200/240 VAC AT-MR815T-30 United Kingdom 200/240 VAC UTP (RJ-45) Connectivity A UTP cable with RJ-45 connectors is shown in Figure 5.
AT-MR415T and AT-MR815T Installation Guide 10Base-T Cable The AT-MR415T/AT-MR815T Micro Repeater supports full-length, fully repeated transmission and maximum node attachments which, for the UTP link, enables transmissions up to 100 meters (328 ft.). 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, but their high-speed data transmission characteristics are radically different.
Installation Hub to MAU Wiring. The most typical UTP cable for the AT-MR415T/ AT-MR815T Micro Repeater will be UTP Hub-to-UTP transceiver Data Terminal Equipment (DTE). To configure your own cables, see Appendix A, “Technical Specifications” on page 23. Quick Installation If you are experienced with electronic networks in general and repeaters in particular, use the following procedure. If you are not certain, or would like to review the installation process, read this list and go on to the next section.
AT-MR415T and AT-MR815T Installation Guide 10Base-T Network Specifications Table 3 provides an overview of the IEEE 802.3 specifications for 10Base-T network configurations using twisted-pair wiring. Table 3: IEEE 802.3 Network Specifications 10Base-T Media Unshielded Twisted Pair Topology Star, Tree External Devices Network Adapter Card Maximum Segment Length 100 meters (328 ft.) Maximum Devices per Segment 12 Maximum Devices per Network 1024 System Check 1.
Installation Standalone Placement of the MR415T/MR815T Both the MR415T and the MR815T can be standalone mounted. When placing the unit horizontally, such as on top of a desk, use the rubber feet. Attach the four rubber feet provided with the unit to the underside of the device in the four corners. Figure 6 shows how the rubber feet are attached to an AT-MR415T. 4 Figure 6: AT-MR415T Horizontal Mounting Connecting to a Network 1. Remove all equipment from the box.
AT-MR415T and AT-MR815T Installation Guide 4. Plug all 10Base-T cables into the 10Base-T network ports (connectors) on the back of the unit. When connecting to the port directly to the right of the MDI MDI-X toggle switch, make sure the switch is set to MDI-X (right position) to use the port as a normal network connection. See step 6 below for instructions on cascading two HUBs. 5. Plug the opposite end of the 10Base-T cables into the network computers. 6.
Installation Examples of Network Connections A Local Area Network can be constructed as shown in Figure 7. Figure 7: LAN Connectivity A Local Area Network can be expanded as shown Figure 8.
AT-MR415T and AT-MR815T Installation Guide Note Regardless of your current network configuration, the maximum number of AT-MR415T/AT-MR815T Micro Repeaters which can be cascaded together is four. Before expanding a network through a T-port, consult the network administrator. Be sure that the expansion will not exceed the limit defined by the current LAN configuration before proceeding. See Figure 9.
Installation Invalid Cascading. An example of invalid cascading is shown in Figure 10. When sending packets over the network, it is possible to send information through up to four cascaded repeaters; however, five or more cascaded repeaters will not produce guaranteed results.
Chapter 3 Troubleshooting This chapter discusses testing AT-MR415T/AT-MR815T Micro Repeaters for a valid connection as well as steps to detect other problems. Performing a Connection Test In order to test for a valid connection, as well as confirm the correct operation of the network, follow the steps outlined below. Refer to Figure 11. PC B PC A PC C Figure 11: AT-MR815T Connection Test 1.
Troubleshooting 4. After confirming that port 1 and port 2 are operational, remove the power, reconnect one of the computers to another port, turn the power back on, then repeat the communications test of step 3. Do this with all of the ports of the AT-MR415T/AT-MR815T Micro Repeaters. When testing the cascade port, connect the port to a computer and select MDI-X using the MDI MDIX toggle switch. 5.
AT-MR415T and AT-MR815T Installation Guide Is The Link On Lamp Lighted? The LINK ON lamps on the front of the repeater will light when a proper connection between the corresponding 10Base-T port and the equipment connected to it is established. If this lamp is not lighted, check for the problems listed below and make corrections as necessary. 1. Problem 1: The UTP (twisted pair) cable has been cut, damaged, or is the wrong type of cable. ❑ Solution: Try making the connection with a different cable.
Appendix A Technical Specifications AT-MR415T Physical Width 112 mm (4.48 in.) Height 98 mm (3.92 in.) Depth 26 mm (1.04 in.) Weight 280 g (9.9 oz.) Installation options Tabletop or rack-mount Connector Ports 4 10Base-T RJ-45 Ethernet ports AT-MR815T Physical Width 175 mm (7 in.) Height 98 mm (3.92 in.) Depth 26 mm (1.04 in.) Weight 430 g (15.2 oz.
Technical Specifications AT-MR415T/AT-MR815T Electrical Use only the wall mounted adapter provided with the product. Countries/Power Voltage Frequency Australia 240VAC 50Hz United Kingdom 240VAC 50Hz Common Market (EC) (except UK) 230VAC 50Hz North America 120VAC 60Hz Maximum Power Consumption 12 Watts Input current 0.
AT-MR415T and AT-MR815T Installation Guide 10Base-T Pin Assignments An Ethernet twisted-pair link segment requires two pairs of wires. Each wire pair is identified by solid and striped colored wires. For example, one wire in the pair might be red and the other wire, red with white stripes. Connectors Notice how the pins are numbered in Figure 12. Be sure to hold the connectors in the same orientation when connecting the wires to the pins.
Technical Specifications Straight-through Wiring If the twisted-pair link segment is to join two ports on a switch, and only one of the ports has an internal crossover, the two pairs of wires must be straightthrough, as shown in Table 5.
AT-MR415T and AT-MR815T Installation Guide 5 - 4 - 3 Rule In addition to IEEE requirements, Table 4 and Table 5, follow the “5-4-3 rule” to ensure that your configuration does not exceed the maximum 10Base-T data transmission path (the longest path through any given network). The 5-4-3 rule describes the maximum path between any two devices or nodes (PCs or other stations) on the network.
Appendix B Glossary 10Base-T—IEEE 802.3 UTP Ethernet. Low-cost Level 3 or better UTP wiring affords 100 meters (328 ft.) of point-to-point link segments. UTP uses RJ-45 connectors and sometimes 50-pin AMP connectors to a patch panel and runs at 10 MHz. BASEBAND COAXIAL SYSTEM—A system whereby information is directly encoded and impressed on the coaxial transmission medium. At any point on the medium, only one information signal at a time can be present without disruption.
Glossary CROSSOVER—Wiring used when connecting a 10Base-T MAU to another 10Base-T MAU or a 10Base-T hub to another 10Base-T hub. For example, one 10Base-T MAU has the TD pair on the same pins as another 10Base-T MAU. If pins were wired straight, there would be two transmitters on one pair and no receiver. As a solution, the crossover cable crosses the TD pair with the RD pair, to connect the TD pins on one end to the RD pins at the other end.
AT-MR415T and AT-MR815T Installation Guide JAM—This is a term used to describe the collision reinforcement signal output by the repeater to all ports. The jam signal consists of 96 bits of alternating 1s and 0s. The purpose is to extend a collision sufficiently so that all devices cease transmitting. JITTER—The fluctuation of the data packet in respect to a standard clock cycle. Jitter is undesirable and must be minimized.
Glossary MANAGEMENT INFORMATION BASE (MIB)—A data base of network configuration and performance information. The formal definition of a MIB includes the names of the objects it contains and the type of information retained. Management protocols such as SNMP and CMIP contain procedures for acquiring and exchanging MIB information. PATCH PANEL—A 10Base-T patch panel may be used between a punchdown block and UTP workstation.
AT-MR415T and AT-MR815T Installation Guide SIGNAL QUALITY ERROR (SQE) TEST—Signal indicates SQE function is active. The SQE message is sent by the MAU to the DTE in the presence of a collision. SIMPLE NETWORK MANAGEMENT PROTOCOL (SNMP)— SNMP is a TCP/IP protocol that generally uses the User Datagram Protocol (UDP) to exchange messages between a management information base and a management client residing on a network.
Appendix C Technical Support Fax Order Name__________________________________________________________________ Company _______________________________________________________________ Address ________________________________________________________________ City ________________________ State/Province_______________________________ Zip/Postal Code ___________________ Country_______________________________ Phone _______________________________ Fax _______________________________ Incident Summary Model number
Appendix D AT-MR415T/AT-MR815T Installation Guide Feedback Please tell us what additional information you would like to see discussed in this guide. If there are topics you would like information on that were not covered in this guide, 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 this guide.
Appendix E Where To Find Us For Technical Support or Service Location Phone Fax Asia Singapore, Taiwan, Thailand, Malaysia, Indonesia, Korea, Philippines, China, India (+65) 3815-613 (+65) 3833-830 Australia Australia, New Zealand (612) 416-0619 (612) 416-9764 France France, Belgium, Luxembourg, The Netherlands, Middle East, Africa (+33) 1-60-92-15-32 (+33) 1-69-28-37-49 Germany Germany, Switzerland, Austria, Eastern Europe (+49) 30-435-900-126 (+49) 30-435-70-650 Hong Kong (+852) 2-529-411
Where To Find Us For Sales Information Australia Lindfield, NSW Tel: (612) 416-0619, Fax: (612) 416-9764 Canada Rexdale, Ontario Tel: (416) 675-6738, Fax: (416) 675-0057 Richmond, British Columbia Tel: (604) 244-0678, Fax: (604) 270-3644 England Abingdon, Oxon Tel: (+44) 1235-442500, Fax: (+44) 1235-442590 France Les Ulis Tel: (+33) 1-60921525, Fax: (+33) 169-28-37-49 Germany Berlin Tel: (+49) 30-435-90-00, Fax: (+49) 30-435-706-50 Freising Tel: (+49) 8161-9906-0, Fax: (+49) 8161-9906-22 Hong Kong Wanchai
Index A Alternating Current (AC) adapter 4, 6 application specific integrated circuit (ASIC) 2 C cables 10 cabling 10Base-T 12, 13 5 - 4 - 3 rule 27 connectors 25 crossover 26 data-quality 11 voice-quality 11 cascade port 5, 7 collisions 4 compliance IEEE 802.
Index rubber feet 14 S segmentation 2 signal propagation delays 15 site requirements 9 specifications 10Base-T Network 13 certification 24 connector ports 23 diagnostic LEDs 24 electrical 24 environmental 24 physical 23 surface mount technology (SMT) 2 V valid connection 19 valid link 3 ventilation 9 W wiring 11, 12, 13, 25, 26, 27 42
