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. 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: Ethernet is a registered trademark of Xerox Corporation. UNIX is a registered trademark in the United States and other countries licensed exclusively through X/Open Company Limited. Novell and NetWare are registered trademarks of Novell, 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 is a trademark of Sun Microsystems, Inc. PC/TCP is a registered trademark of FTP Software, Inc. DECnet is a registered trademark of Digital Equipment Corporation.
All company names, logos, and product designations that are trademarks or registered trademarks are the property of their owners.
Electrical Safety and Installation
Requirements
U.S. Federal Communications Commission
DECLARATION OF CONFORMITY |
|
Manufacturers Name: |
Allied Telesyn International |
Manufacturers Address: |
950 Kifer Road |
|
Sunnyvale, CA 94086 USA |
Manufacturers Telephone: |
408-730-0950 |
Declares that the product: |
Multiport Ethernet Hub unit |
Model Numbers: |
AT-MR415T and AT-MR815T |
Complies with FCC Part 15B, Class B Limits:
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device must not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
RADIATED ENERGY
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment, generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with instructions, may cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encourage to try to correct the interference by one or more of the following measures:
-Reorient or relocate the receiving antenna.
-Increase the separation between the equipment and the receiver.
-Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
-Consult the dealer or an experienced radio/TV technician for help.
Changes and modifications not expressly approved by the manufacturer or registrant of this equipment can void your authority to operate this equipment under Federal Communications Commission rules.
Canadian Department of Communications
This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
iii
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.
LIGHTNING DANGER
DANGER: DO NOT WORK on equipment or CABLES during periods of LIGHTNING ACTIVITY. Do not connect a telephone line into the signal connector.
OPERATING TEMPERATURE
This product is designed for a maximum ambient temperature of 40 degrees C.
ALL COUNTRIES: Install product in accordance with local and National Electrical Codes.
NORMEN: Dieses Produkt erfüllt die Anforderungen der nachfolgenden Normen.
Hochfrequenzstörung |
EN55022 Klasse B |
Störsicherheit |
EN50082-1 |
SICHERHEIT
Der Buchse darf nur aus dem Adapter Strom zugeführt werden.
EUROPE - EC
Gebrauchen Sie einen von TÜV zugelassenen Wechselstromadapter für Gleichstrom 7,5 V, 500 mA
GEFAHR DURCH BLITZSCHLAG
GEFAHR: Keine Arbeiten am Gerät oder an den Kabeln während eines Gewitters ausführen Verbinden Sie nicht das Telefonkabel mit dem Signalverbindungsstecker.
BETRIEBSTEMPERATUR
Dieses Produkt wurde für den Betrieb in einer Umgebungstemperatur von nicht mehr als 40° C entworfen.
ALLE LÄNDER: Installation muß örtlichen und nationalen elektrischen Vorschriften entsprechen.
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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.
BETJENINGSTEMPERATUR
Dette apparat er konstrueret til en omgivende temperatur på maksimum 40 grader C.
ALLE LANDE: Installation af produktet skal ske i overensstemmelse med lokal og national lovgivning for elektriske installationer.
RFI Emissie |
EN55022 Klasse B |
Immuniteit |
EN50082-1 |
VEILIGHEID
Stroom mag alleen via de adapter naar het apparaat toegevoerd worden.
EUROPE - EC
Gebruik een door TÜV gekeurde wisselstroomadapter van 7,5 Volt gelijkstroom, 500 milliampères
GEVAAR VOOR BLIKSEMINSLAG
GEVAAR: NIET aan toestellen of KABELS WERKEN bij BLIKSEM.
Sluit geen telefoonlijn aan op de signaalverbinding.
BEDRIJFSTEMPERATUUR
De omgevingstemperatuur voor dit produkt mag niet meer bedragen dan 40 graden Celsius.
ALLE LANDEN: het toestel installeren overeenkomstig de lokale en nationale elektrische voorschriften.
NORMES: ce produit est conforme aux normes de suivantes:
Emission d’interférences radioélectriques |
EN55022 Classe B |
Immunité |
EN50082 - 1 |
SÉCURITÉ
L’alimentation du concentrateur doit être uniquement fournie par l’adaptateur.
EUROPE - EC
Utiliser un adaptateur secteur conforme TÜV de 7,5 V, 500 mA en courant continu.
DANGER DE FOUDRE
DANGER: NE PAS MANIER le matériel ou les CÂBLES lors d’activité orageuse. Ne pas connecter une ligne téléphonique au connecteur de signaux.
TEMPÉRATURE DE FONCTIONNEMENT
Ce matériel est capable de tolérer une température ambiante maximum de 40 degrés Celsius.
POUR TOUS PAYS : Installer le matériel conformément aux normes électriques nationales et locales.
v
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.
KÄYTTÖLÄMPÖTILA
Tämä tuote on suunniteltu ympäröivän ilman maksimilämpötilalle 40°C.
KAIKKI MAAT: Asenna tuote paikallisten ja kansallisten sähköturvallisuusmääräysten mukaisesti.
Emissione RFI (interferenza di radiofrequenza) EN55022 Classe B
Immunità |
EN50082-1 |
NORME DI SICUREZZA
Questo dispositivo deve essere alimentato solo mediante l’adattatore.
EUROPE - EC
Utilizzare l’adattatore per c.a. da 7,5 V c.c. e 500 mA conforme alla normativa TÜV.
PERICOLO DI FULMINI
PERICOLO: NON LAVORARE sul dispositivo o sui CAVI durante PRECIPITAZIONI
TEMPORALESCHE.
Non collegare una linea telefonica al connettore del segnale.
TEMPERATURA DI FUNZIONAMENTO
Questo prodotto è concepito per una temperatura ambientale massima di 40 gradi centigradi.
TUTTI I PAESI: installare il prodotto in conformità delle vigenti normative elettriche nazionali.
RFI stråling |
EN55022 Klasse B |
Immunitet |
EN50082-1 |
SIKKERHET |
|
All strømtilførsel må komme fra adapteren. |
|
EUROPE - EC
Benytt TÜV-godkjent AC-adapter på 7,5V DC, 500mA (milliampere).
FARE FOR LYNNEDSLAG
FARE: ARBEID IKKE på utstyr eller KABLER i TORDENVÆR.
Telefonlinje må ikke koples til signalkontakten.
DRIFTSTEMPERATUR
Dette produktet er konstruert for bruk i maksimum romtemperatur på 40 grader celsius.
ALLE LAND: Produktet må installeres i samsvar med de lokale og nasjonale elektriske koder.
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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.
Não conecte uma linha telefônica ao conector de sinal.
TEMPERATURA DE FUNCIONAMENTO
Este produto foi projetado para uma temperatura ambiente máxima de 40 graus centígrados.
TODOS OS PAÍSES: Instale o produto de acordo com as normas nacionais e locais para instalações elétricas.
Emisión RFI |
EN55022 Clase B |
Inmunidad |
EN50082-1 |
SEGURIDAD
La energía para el dispositivo central o “hub” debe provenir únicamente del adaptador.
EUROPE - EC
Utilizar un adaptador de corriente alterna autorizado TÜV de 7,5 voltios de corriente continua y 500 miliamperios.
PELIGRO DE RAYOS
PELIGRO: NO REALICE NINGUN TIPO DE TRABAJO O CONEXION en los equipos o en LOS CABLES durante TORMENTAS ELECTRICAS.
No conectar ninguna línea telefónica al conector de señales.
TEMPERATURA REQUERIDA PARA LA OPERACIÓN
Este producto está diseñado para una temperatura ambiental máxima de 40 grados C.
PARA TODOS LOS PAÍSES: Monte el producto de acuerdo con los Códigos Eléctricos locales y nacionales.
Radiostörning |
EN55022 Klass B |
Immunitet |
EN50082-1 |
SÄKERHET
Endast anslutningsenheten får vara kraftkälla till centralen.
EUROPE - EC
Använd en växelströmsanslutningsenhet licensierad av TÜV. Likström 7,5V, 500mA.
FARA FÖR BLIXTNEDSLAG
FARA: ARBETA EJ på utrustningen eller kablarna vid ÅSKVÄDER.
Koppla inte telefonledning till signalkontakten.
DRIFTSTEMPERATUR
Denna produkt är konstruerad för rumstemperatur ej överstigande 40 grader Celsius.
ALLA LÄNDER: Installera produkten i enlighet med lokala och statliga bestämmelser för elektrisk utrustning.
vii
Table of Contents
Electrical Safety and Installation Requirements .................................. |
iii |
Chapter 1 |
|
Product Description ....................................................................................... |
1 |
Overview .............................................................................................................. |
1 |
Features ............................................................................................................... |
1 |
Package Contents ................................................................................................ |
2 |
Latest Technologies............................................................................................. |
2 |
ASIC/SMT..................................................................................................... |
2 |
Packet Regeneration .................................................................................... |
2 |
Link Integrity ............................................................................................... |
2 |
Auto Partitioning ......................................................................................... |
2 |
Jabber Lock-up Protection........................................................................... |
3 |
AT-MR415T ......................................................................................................... |
3 |
Light Emitting Diodes (LEDs)..................................................................... |
3 |
AT-MR815T ......................................................................................................... |
5 |
Light Emitting Diodes (LEDs)..................................................................... |
5 |
Chapter 2 |
|
Installation ....................................................................................................... |
9 |
Site Requirements ............................................................................................... |
9 |
Ventilation .................................................................................................... |
9 |
Power ............................................................................................................ |
9 |
UTP (RJ-45) Connectivity ................................................................................. |
10 |
10Base-T Cable........................................................................................... |
11 |
Quick Installation.............................................................................................. |
12 |
10Base-T Network Specifications.............................................................. |
13 |
System Check .................................................................................................... |
13 |
Standalone Placement of the MR415T/MR815T ............................................. |
14 |
Connecting to a Network................................................................................... |
14 |
Examples of Network Connections............................................................ |
16 |
ix
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? ................................................................ |
21 |
Appendix A |
|
Technical Specifications ............................................................................ |
23 |
AT-MR415T....................................................................................................... |
23 |
Physical ...................................................................................................... |
23 |
Connector Ports ......................................................................................... |
23 |
AT-MR815T....................................................................................................... |
23 |
Physical ...................................................................................................... |
23 |
Connector Ports ......................................................................................... |
23 |
AT-MR415T/AT-MR815T ................................................................................. |
24 |
Electrical .................................................................................................... |
24 |
Environmental........................................................................................... |
24 |
Diagnostic LEDs........................................................................................ |
24 |
Certification ............................................................................................... |
24 |
10Base-T Pin Assignments .............................................................................. |
25 |
Connectors ................................................................................................. |
25 |
Straight-through Wiring .................................................................................. |
26 |
Crossover Wiring .............................................................................................. |
26 |
5 - 4 - 3 Rule ...................................................................................................... |
27 |
Appendix B |
|
Glossary .......................................................................................................... |
29 |
Appendix C |
|
Technical Support Fax Order ................................................................... |
35 |
Incident Summary ............................................................................................ |
35 |
Appendix D |
|
AT-MR415T/AT-MR815T Installation Guide Feedback ....................... |
37 |
Appendix E |
|
Where To Find Us ......................................................................................... |
39 |
x
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. At the same time, they support full-length cable segments with the maximum number of supported devices allowed within IEEE standards.
While identical in structure, the AT-MR415T Micro Repeater differs from the AT-MR815T Micro Repeater in that the former has four (4) Unshielded Twisted Pair (UTP) ports whereas the latter has eight (8).
Features
Each AT-MR415T/AT-MR815T Micro Repeater:
Is IEEE 802.3 compliant
Is 10Base-T and Ethernet Version 1.0 and 2.0 compatible
Has automatic packet regeneration, detection and correction
Supports automatic port disconnect/connect (auto partitioning)
Has test link capabilities
Contains auto partitioning and jabber lock-up protection
Has status and diagnostic LEDs
Supports a 10Base-T uplink port and a MDI/MDI-X switch for network cascading
Can be placed with other hubs in an optional standing chassis
1
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 7.5Vdc, 500mA
Customer Information and Registration Card
Product Warranty Booklet
Four (4) Rubber feet for desktop placement
Latest Technologies
ASIC/SMT
AT-MR415T/AT-MR815T Micro Repeaters have incorporated the latest technologies, including custom Application Specific Integrated Circuit (ASIC) and Surface Mount Technology (SMT). This results in enhanced functionality, increased reliability and improved performance.
Packet Regeneration
Packet regeneration is a high-performance network feature that includes packet preamble regeneration, retiming of data packets and the extension of collision fragments.
Link Integrity
The IEEE 802.3 defined link integrity test function continually monitors the twisted pair cable to ensure link continuity of the receive pair between the user node and the repeater.
Auto Partitioning
Also known as segmentation, each network segment will be automatically partitioned whenever 32 consecutive collisions are seen on the segment. A single valid packet will reset the segment and return it to an auto reconnecting state.
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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.
4
Figure 1: AT-MR415T Front Panel
Light Emitting Diodes (LEDs)
Four Link LEDs show the connectivity of each network port. Three additional LEDs indicate Activity, Collision and Power for the repeater itself.
Note that LEDs will not reflect real-time activity since a data packet is too fast for the human eye to distinguish. therefore the repeater artificially stretches the LED “on” time for easier observation.
LINK ON lamp (green)
—There is a green LINK ON LED for each 10Base-T port. This LED is lighted when the twisted pair cable for the corresponding 10Base-T port is properly connected, the port has established a valid link, and the automatic port connect/disconnect function has been enabled.
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.
3
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. This may be caused by an overloaded segment, a faulty cable, or a bad connection.
—If this LED is lighted for an extended period of time, it is possible that there is a problem with the transceiver or cable.
POWER lamp (green)
—This LED lights when power is being received by the repeater from the AC to DC adapter.
Figure 2 shows the back panel of an AT-MR415T.
Figure 2: AT-MR415T Back Panel
Four UTP RJ45 network ports (including Port 4, an uplink port) are located on the back panel. It also shows the Direct Current (DC) power receptacle which is used in conjunction with the TUV-licensed Alternating Current (AC) adapter which is provided.
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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.
10Base-T Connector
—There is one 10Base-T connector for each port on the unit. Connect 10Base-T cables (twisted pair cable, UTP) into the desired RJ-45 ports.
DC Power Jack
—This connector is used to provide power to the unit using the AC adapter.
AT-MR815T
Figure 3 shows the front panel of an AT-MR815T.
Figure 3: AT-MR815T Front Panel
Light Emitting Diodes (LEDs)
Eight LINK LEDs show the connectivity of each network port. Three additional LEDs indicate Activity, Collision and Power for the repeater itself.
LINK ON lamp (green)
—There is a green LED for each 10Base-T port. This LED is lighted when the twisted pair cable for the corresponding 10Base-T port is properly connected, the port has established a valid link and the automatic port connect/disconnect function has been enabled.
5
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. 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. This may be caused by an overloaded segment, a faulty cable, or a bad connection.
—If this LED is lighted for an extended period of time, it is possible that there is a problem with the transceiver or cable.
POWER lamp (green)
—This LED lights when power is being received by the repeater from the AC to DC adapter.
Figure 4 shows the back panel of an AT-MR815T.
Figure 4: AT-MR815T back Panel
On the back panel are eight UTP RJ45 network ports (including Port 8, an uplink port). It also shows the Direct Current (DC) power receptacle which is used in conjunction with the TUV-licensed Alternating Current (AC) adapter which is provided.
6
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