Allied Telesyn International AT-MR125D User Manual

Centrecom two-port ethernet micro repeater

Hide thumbs

Table Of Contents

Table of Contents

Quick Links

Download this manual

CentreCOM Two-Port Ethernet

Micro Repeater

Model AT-MR125D

User Manual

COLLISION

RECEIVE

COLLISION

RECEIVE

ON LINE

TRANSMIT

ON LINE

TRANSMIT

POWER

MR125D

PORT 1: 10 BASE 2

PORT 2: 10 BASE 2

IEEE 802.3 MICRO REPEATER

PN 613-10368-00 Rev A

951026

Table of Contents

Need help?

Do you have a question about the AT-MR125D and is the answer not in the manual?

Questions and answers

Summary of Contents for Allied Telesyn International AT-MR125D

Page 1 CentreCOM Two-Port Ethernet Micro Repeater Model AT-MR125D User Manual COLLISION RECEIVE COLLISION RECEIVE ON LINE TRANSMIT ON LINE TRANSMIT POWER MR125D PORT 1: 10 BASE 2 PORT 2: 10 BASE 2 IEEE 802.3 MICRO REPEATER PN 613-10368-00 Rev A 951026...
Page 2: Electrical Safety And Installation Requirements
Electrical Safety and Installation Requirements RADIATED ENERGY U.S. Federal Communications 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.
Page 3 VORSICHT De Entlüftungsöffnungen dürfen nicht versperrt sein und müssen zum Kühlen freien Zugang zur Raumluft haben. 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.
Page 4 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. ÉNERGIE IRRADIÉE Ce matériel a été testé et certiﬁé conforme par la réglementation américaine aux normes déﬁnies pour les appareils de Classe A.
Page 5 ENERGIA IRRADIATA Questo prodotto commerciale è stato collaudato e risponde ai requisiti U.S.A. per i dispositivi di classe. NORME DI SICUREZZA PERICOLO DI FULMINI PERICOLO: NON LAVORARE sul dispositivo o sui CAVI durante PRECIPITAZIONI TEMPORALESCHE. ISTRUZIONI PER IL MONTAGGIO ATTENZIONE: questi modelli sono concepiti per il funzionamento in posizione ORIZZONTALE.
Page 6 ENERGIA IRRADIADA Este produto foi testado e atende aos requisitos para dispositivos comerciais de Classe A dos E.U.A. SEGURANÇA PERIGO DE CHOQUE CAUSADO POR RAIO PERIGO: NÃO TRABALHE no equipamento ou nos CABOS durante períodos suscetíveis a QUEDAS DE RAIO. INSTRUÇÕES DE INSTALAÇÃO CUIDADO: Estes modelos foram projetados para funcionar na posição HORIZONTAL.
Page 7 ENERGIUTSTRÅLNING Denna handelsprodukt har testats och befunnits vara i enlighet med USA:s krav för klass A utrustning. SÄKERHET FARA FÖR BLIXTNEDSLAG FARA: ARBETA EJ på utrustningen eller kablarna vid ÅSKVÄDER. MONTERINGSINSTRUKTIONER VARNING: Dessa modeller är konstruerade för användning i HORISONTALLÄGE. VERTIKALMONTERING får EJ UTFÖRAS utan att ett Allied Telesyn specialkonstruerat vertikalt monteringschassi används.
Page 8: Table Of Contents
Incident Summary ....... . . 11 CentreCOM AT-MR125D Manual Feedback Form ..13 Index .
Page 9: Overview
Network diagnostic indicators are provided on the front of the micro repeaters to aid in troubleshooting and fault isolation. Each port has LEDs appropriate for the medium. For example, on the AT-MR125D, both ports have Transmit, Receive, On Line and Collision indicators.
Page 10: External Power Requirements
External Power Requirements The AT-MR125D Micro Repeater is designed to accept a wide range of DC power input. The recommended voltage and power are as follows:  +18V to +35 VDC operational voltage range  +27 VDC preferred nominal voltage ...
Page 11: Switches
Switches Switches Two BNC ports on the AT-MR125D have two terminating switches for selecting or deselecting the internal 50 Ω termination function for the thinnet connection. The factory default of the 50 Ω terminator switch is the ON setting. No Note external BNC-T and 50 Ω...
Page 12: Configurations
Check the media connections and cabling. Excessive collisions may be caused by network loading, a faulty cable or connection. Conﬁgurations The conﬁguration in Figure 4 shows how an AT-MR125D is used to connect two 10BASE2 segments. The termination switch must be on. PORT 2...
Page 13 50 Ω Terminator Terminator Figure 5: AT-MR125D BNC to BNC Using T-Connector If the conﬁguration in Figure 5 is used with BNC-T connectors in the center of a segment, the termination switch must be disabled (OFF) on the LAN repeater...
Page 14: Ieee 802.3 Quick Primer
IEEE 802.3 Quick Primer AUI “Drop” Cables AUI or “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-sub connector. AUI “Drop” cables may have a maximum 257ns propagation delay for computing the worst case propagation delay of a cable system.
Page 15: Propagation
IEEE 802.3 Quick Primer Propagation Round-trip propagation delay throughout the entire cable system, from farthest ends, may not exceed 51.7 µs. Propagation delay is the time it takes a signal to travel from the input of a system component to the output. Propagation delay is usually measured in nanoseconds. IEEE 802.3 has speciﬁc propagation delay maximums for the Ethernet components.
Page 16: Glossary
Glossary Glossary 10BASE2 — Also called thinnet or CheaperNet, 10BASE2 is a 10 MHz, Baseband, 185 meter (606 ft.) coaxial segment. Cable impedance is 50 Ω. 10BASE5 — Also called thick Ethernet, 10BASE5 is a 10 MHz, Baseband, 500 meter (1639 ft.) coaxial segment. The cable is also referred to as “yellow” cable. Cable impedance is 50 Ω.
Page 17 LINK SEGMENT — The link segment of coaxial cable is a segment which has no MAU devices but links two LAN devices such as repeaters together in a point-to- point configuration. By the inherent nature of 10BASE-T and fiber optic media, these media are point-to-point link segments.
Page 18 Trademarks Ethernet™ is a registered trademark of Xerox Corporation. CentreCOM™ is a registered trademark of Allied Telesyn Copyright © 1995 Allied Telesyn, Inc. All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesyn. Allied Telesyn (ATI) reserves the right to make changes in specifications and other information contained in this document without prior written notice.
Page 19: Technical Support Fax Order Form
Technical Support Fax Order Form Technical Support Fax Order Form Name_________________________________________________________________ Company_____________________________________________________________ Address ______________________________________________________________ City ___________________ State/Province _______________________________ Zip/Postal Code ______________ Country _______________________________ Phone _____________________________ Fax _______________________________ Incident Summary Model number of Allied Telesyn product I am using __________________ Network software products I am using (e.g., network managers)_____ ______________________________________________________________________ Brief summary of problem ___________________________________________ ______________________________________________________________________...
Page 20: Centrecom At-Mr125D Manual Feedback Form
CentreCOM AT-MR125D Manual Feedback Form CentreCOM AT-MR125D Manual Feedback Form 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.
Page 21: Index
Index Index Four Repeater Rule Numerics 10BASE2 LEDs Application Specific Integrated Circuit (ASIC) Media Access Units (MAU) AUI "Drop" cables On Line BNC-T Power propagation delay Collision Receive Data Terminal Equipment (DTE) Surface Mount Technology (SMT) External Power Supply Micro Repeaters Transmit...
Page 22: Where To Find Us
Hong Kong (+852) 2-393-0101 (+852) 2-397-7979 Technical Bulletin Board Service 1 (206) 483-7979 For Information Regarding Allied Telesyn International Corp. Allied Telesyn International Corp. Allied Telesyn International Corp. 19015 North Creek Parkway Suite 200 950 Kifer Road Bothell, WA 98011...
Page 23 For Sales Information The Netherlands United States Schiphol Atlanta, GA Tel: (+31) 20-654-0111, Fax: (+31) 20-654-0270 Tel: (404) 717-0290, Fax: (404) 717-0806 Salt Lake City, UT Italy Tel: (801) 350-9130, Fax: (801) 350-9051 Milano Vienna, VA Tel: (+39) 2-38093-444, Fax: (+39) 2-38093-448 Tel: (703) 506-0196, Fax: (703) 506-1986 England Chicago, IL...
Page 24 CentreCOM is a trademark of Allied Telesyn International Corp. Copyright 1995 Allied Telesyn International. All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesyn. Allied Telesyn reserves the right to make changes in speciﬁcations and other information contained in this document without prior written notice.