AT-MR908TX Installation Guide

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. 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 of UNIX System Laboratories. 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.
PN 613-10555-00 Rev. B
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. This equipment generates, uses, and can radiate radio
frequency energy and , if not installed and used in accordance with this instruction
manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference in which case the
user will be required to correct the interference at his own expense.
Note: Modifications or changes not expressly approved of by the manufacturer or the
FCC, can void your right to operate this equipment.
Canadian Department of Communications
This Class A digital apparatus meets all requirements of the Canadian InterferenceCausing Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le
matériel brouilleur du Canada.
STANDARDS: This product meets the following standards
RFI Emission EN55022 Class A
WARNING: In a domestic environment this product may cause radio interference in which
case the user may be required to take adequate measures.
Immunity EN50082-1
SAFETY
ELECTRICAL NOTICES
WARNING: ELECTRIC SHOCK HAZARD
To prevent ELECTRIC shock , do not remove cover. No user-serviceable parts inside. This
unit contains HAZARDOUS VOLTAGES and should only be opened by a trained and qualified
technician. To avoid the possibility of ELECTRIC SHOCK disconnect electric power to the
product before connecting or disconnecting the LAN cables.
LIGHTNING DANGER
DANGER: DO NOT WORK on equipment or CABLES during periods of LIGHTNING
ACTIVITY.
i
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.
ELECTRICAL—CORD NOTICE
Use power cord, maximum 4.5 meters long, rated 6 amp minimum, 250V, made of HAR
cordage molded IEC 320 connector on one end and on the other end a plug approved by
the country of end use.
MOUNTING INSTRUCTIONS
CAUTION: Air vents must not be blocked and must have free access to the room ambient
air for cooling.
OPERATING TEMPERATURE
This product is designed for a maximum ambient temperature of 50 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 A
WARNUNG: Bei Verwendung zu Hause kann dieses Produkt Funkstörungen hervorrufen. In
diesem Fall müßte der Anwender angemessene Gegenmaßnahmen ergreifen.
Störsicherheit EN50082-1
SICHERHEIT
ACHTUNG: GEFÄHRLICHE SPANNUNG
Das Gehäuse nicht öffnen. Das Gerät enthält keine vom Benutzer wartbaren Teile. Das Gerät
steht unter Hochspannung und darf nur von qualifiziertem technischem Personal geöffnet
werden. Vor Anschluß der LAN-Kabel, Gerät vom Netz trennen.
GEFAHR DURCH BLITZSCHLAG
GEFAHR: Keine Arbeiten am Gerät oder an den Kabeln während eines Gewitters ausführen
VORSICHT: DAS NETZKABEL DIENT ZUM TRENNEN DER STROMVERSORGUNG. ZUR
TRENNUNG VOM NETZ, KABEL AUS DER STECKDOSE ZIEHEN.
ii
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.
NETZKABEL
Das Netzkabel sollte eine maximale Länge von 4,5 Metern, einen Nennwert von mindestens
6 A und 250 V haben, aus HAR-Material hergestellt und mit einer gepreßten, IEC 320
entsprechenden, Anschlußverbindung an einem Ende, und am anderen Ende mit einem im
Land des Endverbrauchers geprüften Stecker ausgestattet sein.
MONTAGEANWEISUNGEN
VORSICHT
Die 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
50° C entworfen.
ALLE LÄNDER: Installation muß örtlichen und nationalen elektrischen Vorschriften
entsprechen.
Radiofrekvens forstyrrelsesemission EN55022 Klasse A
ADVARSEL: I et hjemligt miljø kunne dette produkt forårsage radio forstyrrelse. Bliver det
tilfældet, påkræves brugeren muligvis at tage tilstrækkelige foranstaltninger.
Immunitet EN50082-1
SIKKERHED
ELEKTRISKE FORHOLDSREGLER
ADVARSEL: RISIKO FOR ELEKTRISK STØD For at forebygge ELEKTRISK stød, undlad at
åbne apparatet. Der er ingen indre dele, der kan repareres af brugeren. Denne enhed
indeholder LIVSFARLIGE STRØMSPÆNDINGER og bør kun åbnes af en uddannet og
kvalificeret tekniker. For at undgå risiko for ELEKTRISK STØD, afbrydes den elektriske
strøm til produktet, før LAN-kablerne monteres eller afmonteres.
FARE UNDER UVEJR
FARE: UNDLAD at arbejde på udstyr eller KABLER i perioder med LYNAKTIVITET.
ADVARSEL: DEN STRØMFØRENDE LEDNING BRUGES TIL AT AFBRYDE STRØMMEN.
SKAL STRØMMEN TIL APPARATET AFBRYDES, tages ledningen ud af stikket.
iii
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.,
250 v, bestående af en IEC 320 connector med indstøbt HAR ledning i den ene ende og et
stik i den anden ende, der er godkendt af myndighederne i brugerlandet.
INSTRUKTIONER FOR OPSTILLING
ADVARSEL: Ventilationsåbninger må ikke blokeres og skal have fri adgang til den
omgivende luft i rummet for afkøling.
BETJENINGSTEMPERATUR
Dette apparat er konstrueret til en omgivende temperatur på maksimum 50 grader C.
ALLE LANDE: Installation af produktet skal ske i overensstemmelse med lokal og national
lovgivning for elektriske installationer.
RFI Emissie EN55022 Klasse A
WAARSCHUWING: Binnenshuis kan dit product radiostoring veroorzaken, in welk geval de
gebruiker verplicht kan worden om gepaste maatregelen te nemen.
Immuniteit EN50082-1
VEILIGHEID
WAARSCHUWINGEN MET BETREKKING TOT ELEKTRICITEIT
WAARSCHUWING: GEVAAR VOOR ELEKTRISCHE SCHOKKEN
Verwijder het deksel niet, teneinde ELEKTRISCHE schokken te voorkomen. Binnenin
bevinden zich geen onderdelen die door de gebruiker onderhouden kunnen worden. Dit
toestel staat onder GEVAARLIJKE SPANNING en mag alleen worden geopend door een
daartoe opgeleide en bevoegde technicus. Om het gevaar op ELEKTRISCHE SCHOKKEN te
vermijden, moet u het toestel van de stroombron ontkoppelen alvorens de LAN-kabels te
koppelen of ontkoppelen.
GEVAAR VOOR BLIKSEMINSLAG
GEVAAR: NIET aan toestellen of KABELS WERKEN bij BLIKSEM.
WAARSCHUWING: HET TOESTEL WORDT UITGESCHAKELD DOOR DE STROOMKABEL TE
ONTKOPPELEN.OM HET TOESTEL STROOMLOOS TE MAKEN: de stroomkabel ontkoppelen.
iv
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.
ELEKTRISCHE SNOEREN
Gebruik een elektrisch snoer, maximum 4,5 meter lang, berekend voor ten minste 6
ampåçère, 250 V, uit HAR vervaardigd, met aan het ene uiteinde een gevormd IEC 320
aansluitstuk en aan het andere uiteinde een stekker die goedgekeurd is door het land waar
het toestel gebruikt zal worden.
MONTAGE—INSTRUCTIES
OPGELET: De ventilatiegaten mogen niet worden gesperd en moeten de omgevingslucht
ongehinderd toelaten voor afkoeling.
BEDRIJFSTEMPERATUUR
De omgevingstemperatuur voor dit produkt mag niet meer bedragen dan 50 graden Celsius.
ALLE LANDEN: het toestel installeren overeenkomstig de lokale en nationale elektrische
voorschriften.
Emission d’interférences radioélectriques EN55022 Classe A
MISE EN GARDE: dans un environnement domestique, ce produit peut provoquer des
interférences radioélectriques. Auquel cas, l’utilisateur devra prendre les mesures
adéquates.
Immunité EN50082 - 1
SÉCURITÉ
INFORMATION SUR LES RISQUES ÉLECTRIQUES
AVERTISSEMENT: DANGER D’ÉLECTROCUTION
Pour éviter toute ÉLECTROCUTION, ne pas ôter le revêtement protecteur du matériel. Ce
matériel ne contient aucun élément réparable par l’utilisateur. Il comprend des TENSIONS
DANGEREUSES et ne doit être ouvert que par un technicien dûment qualifié. Pour éviter
tout risque d’ÉLECTROCUTION, débrancher le matériel avant de connecter ou de
déconnecter les câbles LAN.
DANGER DE FOUDRE
DANGER: NE PAS MANIER le matériel ou les CÂBLES lors d’activité orageuse.
ATTENTION : LE CORDON D’ALIMENTATION SERT DE MISE HORS CIRCUIT. POUR
COUPER L’ALIMENTATION DU MATÉRIEL, débrancher le cordon.
v
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.
INFORMATION SUR LE CORDON ÉLECTRIQUE
Utiliser un cordon secteur de 4.5 mètres de long maximum, calibré à 6 ampères minimum,
250V, fabriqué en câblage HAR avec connecteur IEC 32C moulé à une extrémité, et à l’autre
extrémité, une prise de courant mâle répondant aux normes du pays d’utilisation.
INSTRUCTIONS DE MONTAGE
ATTENTION: Ne pas bloquer les fentes d’aération, ceci empêcherait l’air ambiant de circuler
librement pour le refroidissement.
TEMPÉRATURE DE FONCTIONNEMENT
Ce matériel est capable de tolérer une température ambiante maximum de 50 degrés
Celsius.
POUR TOUS PAYS: Installer le matériel conformément aux normes électriques nationales et
locales.
Radioaaltojen häirintä EN55022 Luokka A
VAROITUS: Kotiolosuhteissa tämä laite voi aiheuttaa radioaaltojen häiröitä, missä
tapauksessa laitteen käyttäjän on mahdollisesti ryhdyttävä tarpeellisiin toimenpiteisiin.
Kestävyys EN50082-1
TURVALLISUUS
SÄHKÖÖN LIITTYVIÄ HUOMAUTUKSIA
VAROITUS: SÄHKÖISKUVAARA
Estääksesi SÄHKÖISKUN älä poista kantta. Sisällä ei ole käyttäjän huollettavissa olevia osia.
Tämä laite sisältää VAARALLISIA JÄNNITTEITÄ ja sen voi avata vain koulutettu ja pätevä
teknikko. Välttääksesi SÄHKÖISKUN mahdollisuuden katkaise sähkövirta tuotteeseen ennen
kuin liität tai irrotat paikallisverkon (LAN) kaapelit.
SALAMANISKUVAARA
HENGENVAARA: ÄLÄ TYÖSKENTELE laitteiden tai KAAPELEIDEN KANSSA SALAMOINNIN
AIKANA.
HUOMAUTUS: VIRTAJOHTOA KÄYTETÄÄN VIRRANKATKAISULAITTEENA. VIRTA
KATKAISTAAN irrottamalla virtajohto.
vi
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.
SÄHKÖ—JOHTOON LIITTYVÄ HUOMAUTUS
Käytä seuraavanlaista virtajohtoa: maksimipituus 4,5 metriä, minimiteho 6 ampeeria, 250 V,
valmistettu HAR-johdostosta, muovattu IEC 320 -liitin toisessa päässä ja käyttömaassa
hyväksytty pistoke toisessa päässä.
ASENNUSSOHJEET
HUOMAUTUS: Ilmavaihtoreikiä ei pidä tukkia ja niillä täytyy olla vapaa yhteys ympäröivään
huoneilmaan, jotta ilmanvaihto tapahtuisi.
KÄYTTÖLÄMPÖTILA
Tämä tuote on suunniteltu ympäröivän ilman maksimilämpötilalle 50°C.
KAIKKI MAAT: Asenna tuote paikallisten ja kansallisten sähköturvallisuusmääräysten
mukaisesti.
Emissione RFI (interferenza di radiofrequenza) EN55022 Classe A
AVVERTENZA: in ambiente domestico questo prodotto potrebbe causare radio interferenza.
In questo caso potrebbe richiedersi all’utente di prendere gli adeguati provvedimenti.
Immunità EN50082-1
NORME DI SICUREZZA
AVVERTENZE ELETTRICHE
ATTENZIONE: PERICOLO DI SCOSSE ELETTRICHE
Per evitare SCOSSE ELETTRICHE non asportare il coperchio. Le componenti interne non
sono riparabili dall’utente. Questa unità ha TENSIONI PERICOLOSE e va aperta solamente
da un tecnico specializzato e qualificato. Per evitare ogni possibilità di SCOSSE
ELETTRICHE, interrompere l’alimentazione del dispositivo prima di collegare o staccare i
cavi LAN.
PERICOLO DI FULMINI
PERICOLO: NON LAVORARE sul dispositivo o sui CAVI durante PRECIPITAZIONI
TEMPORALESCHE.
ATTENZIONE: IL CAVO DI ALIMENTAZIONE È USATO COME DISPOSITIVO DI
DISATTIVAZIONE. PER TOGLIERE LA CORRENTE AL DISPOSITIVO staccare il cavo di
alimentazione.
vii
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.
ELETTRICITÀ—AVVERTENZA SUL CAVO
Usare un cavo della lunghezza massima di metri 4,5, con capacità minima di 6 A, 250 V, di
filo HAR, dotato di connettore stampato IEC 320 ad un’estremità e di spina approvata dal
paese di destinazione all’altra.
ISTRUZIONI PER IL MONTAGGIO
ATTENZIONE: le prese d’aria non vanno ostruite e devono consentire il libero ricircolo
dell’aria ambiente per il raffreddamento.
TEMPERATURA DI FUNZIONAMENTO
Questo prodotto è concepito per una temperatura ambientale massima di 50 gradi
centigradi.
TUTTI I PAESI: installare il prodotto in conformità delle vigenti normative elettriche
nazionali.
RFI stråling EN55022 Klasse A
DVARSEL: Hvis dette produktet benyttes til privat bruk, kan produktet forårsake
radioforstyrrelse. Hvis dette skjer, må brukeren ta de nødvendige forholdsregler.
Immunitet EN50082-1
SIKKERHET
ELEKTRISITET
ADVARSEL: FARE FOR ELEKTRISK SJOKK
For å unngå ELEKTRISK sjokk, må dekslet ikke tas av. Det finnes ingen deler som brukeren
kan reparere på innsiden. Denne enheten inneholder FARLIGE SPENNINGER, og må kun
åpnes av en faglig kvalifisert tekniker. For å unngå ELEKTRISK SJOKK må den elektriske
strømmen til produktet være avslått før LAN-kablene til- eller frakobles.
FARE FOR LYNNEDSLAG
FARE: ARBEID IKKE på utstyr eller KABLER i TORDENVÆR.
FORSIKTIG: STRØMLEDNINGEN BRUKES TIL Å FRAKOBLE UTSTYRET. FOR Å
DEAKTIVISERE UTSTYRET, må strømforsyningen kobles fra.
viii
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. i lengde, godkjent for minst av 6 amp, 250V,
fremstilt av HAR ledning IEC 320 koplingsstykke i den ene enden, og i den andre enden en
plugg som er blitt godkjent i brukerlandet.
BRUKSANVISNING FOR MONTERING
FORSIKTIG: Lufteventilene må ikke blokkeres, og må ha fri tilgang til luft med
romtemperatur for avkjøling.
DRIFTSTEMPERATUR
Dette produktet er konstruert for bruk i maksimum romtemperatur på 50 grader celsius.
ALLE LAND: Produktet må installeres i samsvar med de lokale og nasjonale elektriske
koder.
Emissão de interferência de radiofrequência EN55022 Classe A
AVISO: Num ambiente doméstico este produto pode causar interferência na radiorrecepção
e, neste caso, pode ser necessário que o utente tome as medidas adequadas.
Imunidade EN50082-1
SEGURANÇA
AVISOS SOBRE CARACTERÍSTICAS ELÉTRICAS ATENÇÃO: PERIGO DE CHOQUE ELÉTRICO
Para evitar CHOQUE ELÉTRICO, não retire a tampa. Não contém peças que possam ser
consertadas pelo usuário. Este aparelho contém VOLTAGENS PERIGOSAS e só deve ser
aberto por um técnico qualificado e treinado. Para evitar a possibilidade de CHOQUE
ELÉTRICO, desconecte o aparelho da fonte de energia elétrica antes de conectar e
desconectar os cabos da LAN.
PERIGO DE CHOQUE CAUSADO POR RAIO
PERIGO: NÃO TRABALHE no equipamento ou nos CABOS durante períodos suscetíveis a
QUEDAS DE RAIO.
CUIDADO: O CABO DE ALIMENTAÇÃO É UTILIZADO COMO UM DISPOSITIVO DE
DESCONEXÃO. PARA DESELETRIFICAR O EQUIPAMENTO, desconecte o cabo de
ALIMENTAÇÃO.
ix
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.
ELÉTRICO—AVISO SOBRE O CABO DE ALIMENTAÇ_O
Use cabo de alimentação com comprimento máximo de 4,5 metros, com uma capacidade
indicada mínima de 6 amp e 250 V, fabricado de material para cabo HAR com conector
moldado IEC 320 em uma extremidade e, na outra extremidade, um plugue aprovado para
uso no país em questão.
INSTRUÇÕES DE INSTALAÇÃO
CUIDADO: As aberturas de ventilação não devem ser bloqueadas e devem ter acesso livre
ao ar ambiente para arrefecimento adequado do aparelho.
TEMPERATURA DE FUNCIONAMENTO
Este produto foi projetado para uma temperatura ambiente máxima de 50 graus
centígrados.
TODOS OS PAÍSES: Instale o produto de acordo com as normas nacionais e locais para
instalações elétricas.
Emisión RFI EN55022 Clase A
ADVERTENCIA: en un entorno doméstico, este producto puede causar radiointerferencias,
en cuyo caso, puede requerirse del usuario que tome las medidas que sean convenientes al
respecto.
Inmunidad EN50082-1
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.
PELIGRO DE RAYOS
PELIGRO: NO REALICE NINGUN TIPO DE TRABAJO O CONEXION en los equipos o en LOS
CABLES durante TORMENTAS ELECTRICAS.
ATENCION: EL CABLE DE ALIMENTACION SE USA COMO UN DISPOSITIVO DE
DESCONEXION. PARA DESACTIVAR EL EQUIPO, desconecte el cable de alimentación.
x
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.
ELECTRICO—ADVERTENCIA SOBRE EL CABLE
Use un cable eléctrico con un máximo de 4,5 metros de largo, con una capacidad mínima
de 6 amperios, 250 V, hecho de cable HAR, con el conector moldeado IEC 320 en un
extremo y con un enchufe que está aprobado por el país de uso final en el otro.
INSTRUCCIONES DE MONTAJE
ATENCION: Las aberturas para ventilación no deberán bloquearse y deberán tener acceso
libre al aire ambiental de la sala para su enfriamiento.
TEMPERATURA REQUERIDA PARA LA OPERACIÓN
Este producto está diseñado para una temperatura ambiental máxima de 50 grados C.
PARA TODOS LOS PAÍSES: Monte el producto de acuerdo con los Códigos Eléctricos
locales y nacionales.
Radiostörning EN55022 Klass A
VARNING: Denna produkt kan ge upphov till radiostörningar i hemmet, vilket kan tvinga
användaren till att vidtaga erforderliga åtgärder.
Immunitet EN50082-1
SÄKERHET
TILLKÄNNAGIVANDEN BETRÄFFANDE ELEKTRICITETSRISK:
RISK FÖR ELEKTRISK STÖTFör att undvika ELEKTRISK stöt, ta ej av locket. Det finns inga
delar inuti som behöver underhållas. Denna apparat är under HÖGSPÄNNING och får endast
öppnas av en utbildad kvalificerad tekniker. För att undvika ELEKTRISK STÖT, koppla ifrån
produktens strömanslutning innan LAN-kablarna ansluts eller kopplas ur.
FARA FÖR BLIXTNEDSLAG
FARA: ARBETA EJ på utrustningen eller kablarna vid ÅSKVÄDER.
VARNING: NÄTKABELN ANVÄNDS SOM STRÖMBRYTARE FÖR ATT KOPPLA FRÅN
STRÖMMEN, dra ur nätkabeln.
INSTALLATION
ELEKTRISKT—AUTOMATISK SPÄNNINGSJUSTERING
Denna produkt justeras automatiskt till alla spänningar inom omfånget som indikeras på
produktens märkning.
xi
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.
ELEKTRISKT—ANMÄRKNING BETRÄFFANDE KABELN
Använd en kabel med maximum längd 4,5 meter och minimum 6 amp nominal, 250V, av
HAR kabelfabrikat med ett specialutformat IEC 320-kontaktdon i ena änden och i den andra
en plugg som godkänts i landet där produkten används.
MONTERINGSINSTRUKTIONER
VARNING: Luftventilerna får ej blockeras och måste ha fri tillgång till omgivande rumsluft
för avsvalning.
DRIFTSTEMPERATUR
Denna produkt är konstruerad för rumstemperatur ej överstigande 50 grader Celsius.
ALLA LÄNDER: Installera produkten i enlighet med lokala och statliga bestämmelser för
elektrisk utrustning.
xii
Table of Contents
Electrical Safety and Installation Requirements . . . . . . . . . . . . . . . . . . . i
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
Document Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xviii
Contacting ATI Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xviii
Phone Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xviii
Bulletin Board Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix
Internet Mail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix
CompuServe Forum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix
World Wide Web . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix
Chapter 1
Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Light-emitting Diodes (LEDs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
1
2
2
3
4
5
Chapter 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Site Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Network Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
100BASE-TX Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Alternative Installations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Standalone Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Cascading With Fast Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
The Two-Repeater Rule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Cascaded Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Collision Domain Diameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Stacked Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
AT-MR901 Stacking Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Chassis or Stacking Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Stacked/Cascaded Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
xv
Chapter 3
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connectivity Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Is the unit receiving power? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Is the Link/Activity LED illuminated? . . . . . . . . . . . . . . . . . . . . . . . . . . .
21
21
22
22
22
Appendix A
AT-MR908TX Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Physical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical and Mechanical Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cabling Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UTP (RJ-45) Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
100BASE-TX Cable Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
One-to-One Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crossover Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25
25
25
26
27
27
28
28
28
Appendix B
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Appendix C
Technical Support Fax Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Appendix D
CentreCOM AT-MR908TX Manual Feedback . . . . . . . . . . . . . . . . . . . . . 37
Appendix E
Where To Find Us . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Appendix F
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
xvi
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.
❑
Chapter 2, “Installation,” describes site and power requirements, as
well as conventional installation procedures and network connectivity.
❑
Chapter 3, “Troubleshooting,” discusses testing, valid connectivity,
and problem identification and resolution.
❑
Appendix A, “Technical Specifications,” includes specifications for the
AT-MR908TX hubs.
❑
Appendix B, “Glossary,” provides a glossary of terms that are product
and industry specific to the AT-MR908TX hubs.
❑
Appendix C is a “Technical Support Fax Order.”
❑
Appendix D, “AT-MR908TX Hub Manual Feedback Form,” offers a
means to transmit your comments and/or suggestions for improving
the documentation.
❑
Appendix E, “Where to Find Us,” gives you Technical Support and
Service information.
❑
Appendix F, “Index,” is an index to this manual.
xvii
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.
Contacting ATI Technical Support
If you are having problems with your AT-MR908TX hub, you can contact ATI’s
Technical Support staff by:
❑
Telephone
❑
Bulletin board services
❑
Electronic mail via the Internet
❑
CompuServe forum
When you contact Technical Support, you should have the following
information available:
❑
Serial number of the AT-MR908TX hub
❑
Power-up test codes, if any
❑
Diagnostic test codes, if any
Phone Numbers
You can contact technical support by calling Monday through Friday from 6:30
AM to 5:00 PM PST:
1-800-428-4835
(United States)
If you need to FAX information to technical support, the number is:
206-481-3790
Appendix C also has a complete FAX form which can be used. For technical
support telephone numbers outside of the United States and Canada, contact
your reseller or regional ATI office. This information can be found in
Appendix E on page 39.
xviii
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.
Internet Mail
You can send electronic mail via the Internet to:
[email protected]
CompuServe Forum
ATI has a forum on CompuServe. You can reach us by typing go allied at
the CompuServe prompt (!).
World Wide Web
You can access Allied Telesyn at our new Web Site using the following:
http://www.alliedtelesyn.com
xix
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. This process allows a single network
workgroup to support as many as 94 workstations.
Stacked Hub Configuration. A fully populated stack will support six hubs. Using
ATI’s optional stacking module, a stack of six units can be physically
connected while logically appearing to be a single hub — with additional ports.
In a fully populated stacked hub configuration, your 100 Mbps network will
support as many as 48 network nodes or devices.
Figure 1 shows the front panel of an AT-MR908TX.
HUB STATUS
Utilization (%)
Figure 1: AT-MR908TX Front Panel
AT-MR908TX hubs are fully compliant with IEEE 802.3u standards for 100
Mbps baseband networks. They are also easy to install. There are neither DIP
switches to set nor software to load. You simply plug in the power cord and
connect your 100BASE-TX station ports.
1
Product Description
Features
AT-MR908TX Standalone/Stackable hubs incorporate the following features:
❑
Compliance with IEEE 802.3u 100Mbps repeater specification
❑
Class I and II compliance
❑
Eight 100BASE-TX ports for Fast Ethernet connectivity
❑
Metal chassis for either desktop or 19-inch rackmount installation
❑
Internal fan and two side-vents support 0-500 C (32-1220 F) degrees of
temperature
❑
Unshielded/Shielded (UTP/STP) Twisted Pair cabling (Category 5)
— Up to 5 meters maximum for each hub-to-hub connection
— Up to 100 meters maximum for each hub-to-workstation connection
❑
A MDI/MDI-X slide switch for ease of cascading
❑
Auto-partitioning of ports that receive excessive collisions
❑
Full compatibility with other ATI 100MB products
❑
Stackability (AT-MR908TX-19A, AT-MR908TX-29A, AT-MR908TX39A only)
Package Contents
The parts included with each AT-MR908TX hub are listed below. Please check
the equipment you received to make sure you have everything.
❑
100BASE-TX Fast Ethernet hub with 8 shielded RJ45 ports
❑
Power cord
❑
Warranty card
❑
This installation manual
❑
AT-MR901 stacking module, AT-MR901 stacking module cable
(SCSI II), stacking brackets (AT-MR908TX-19A, AT-MR908TX-29A,
AT-MR908TX-39A only)
Note
If any item listed above is missing, please notify your ATI sales
representative.
2
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.
AT-MR908TX-20A
Standalone
200-240 VAC; power cord for Continental
Europe
AT-MR908TX-29A
Stackable
200-240 VAC; power cord for Continental
Europe
AT-MR908TX-30A
Standalone
200-240 VAC; power cord for United Kingdom
AT-MR908TX-39A
Stackable
200-240 VAC; power cord for United Kingdom
Note
Rack mounting will require use of a hub rackmount installation kit.
For additional information about rackmount installation kits, please
contact your ATI sales representative.
3
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.
HUB STATUS
Utilization (%)
Collision Detection
Power ON/OFF
Link/Activity
HUB STATUS
Utilization (%)
Utilization
Error Detection
Figure 2: Front Panel LEDs
An array of light-emitting diodes (LEDs) enable performance monitoring and
failure analysis:
❑
A System Collision LED
❑
A Power LED
❑
Five network Utilization status LEDs
❑
Eight Link/Activity LEDs, one for each RJ45 port
❑
Eight Error detection LEDs, one for each RJ45 port
Front-panel LEDs help you monitor the status of each port. The two parallel
rows of eight Link/Activity LEDs and eight Error LEDs correspond with the 8
shielded RJ-45 ports on the back panel. The five Utilization LEDs indicate hub
traffic within the Fast Ethernet bandwidth. Two additional front panel LEDs
indicate power ON/OFF and collision detection.
4
AT-MR908TX Installation Manual
Table 2 details the purpose, color, and functional description of each LED.
Table 2: Front Panel LEDs
LED
Color
Description
Power (PWR)
Green
Lighted: Power on
Unlighted: Power off
Collision (COL)
Amber
Lighted: Data collision occurring
Link/Activity
Green
Lighted: Adapter connected to hub
Flickering: Data receiving
Error
Yellow
Flashing: Data error occurring
Lighted: Partition and isolation of port
Utilization
Green
Hub traffic of the Fast Ethernet bandwidth
(1%, 8%, 16%, 32%, 64%)
Back Panel
Standalone/Cascade Hub. The back panel of the standalone AT-MR908TX hub is
equipped with a power receptacle, 8 RJ45 ports, and an uplink slide switch
that is defaulted to the MDI-X position for standalone operation.
Models AT-MR908TX-10A, AT-MR908TX-20A or AT-MR908TX-30A have a
blank faceplate. Models AT-MR908TX-19A, AT-MR908TX-29A or
AT-MR908TX-39A include ATI’s AT-MR901 stacking module.
MDI/MDI-X slide switch
Network ports
blank faceplate
Power receptacle
Figure 3: AT-MR908TX Back Panel
5
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.
AT-MR901 Stacking Module
Figure 4: Installed AT-MR901 Stacking Module
6
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. ATI provides different power cords based on the
requirements of different countries.
Maximum power consumption for the standalone AT-MR908TX-10A,
ATMR908TX-20A, or AT-MR908TX-30A is 32W.
Maximum power to the stackable AT-MR908TX-19A, AT-MR908TX-29A,
or AT-MR908TX-39A is 35W.
7
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 802.3u Network Specifications
10BASE-T
100BASE-TX
Media
Unshielded/Shielded
Twisted Pair
Category 3, 4, or 5
Unshielded/Shielded
Twisted Pair
Category 5 only
Topology
Star, Tree
Star, Tree
External Devices
Network Adapter Card
Repeater
Network Adapter Card
Repeater
Maximum Segment Length
100 meters (328 feet)
100 meters (328 feet)
100BASE-TX Cable
There are various grades of voice-quality and data-quality cables available.
These can appear to be similar externally, although their high-speed data
transmission characteristics are radically different.
The identification problem is made worse by some suppliers selling voicequality cables as data-quality cables.
If voice-quality cables are used in a 100BASE-TX network system, data
movement may be slow, collision-prone or non-existent. To further confuse the
issue, interface indicators will usually indicate a valid link in such a case.
For the foregoing reasons, it is absolutely vital that all cabling used with
100BASE-TX connections is Category 5. Using any other category, or a poor
quality cable, for a 100BASE-TX connection will potentially have high error
rates or will not move data at all.
8
AT-MR908TX Installation Manual
The six common modular cable specifications and their applicability to
100BASE-TX networks are shown in Table 4.
Table 4: Twisted Pair Cable
Cable
Cat
Cable
Description
AC
Character
Specification
Twist/Foot
100BASE-TX
OK?
1
Unshielded
Untwisted
N/A
CCITT
None
NO!
2
Individual
UTP
100Ω
±30Ω
RS232
1BASE5 AT&T
PDS
None
NO!
3
Typical
Individual
UTP
100Ω
±15Ω
T1, AT&T ISDN
10BASE-T
IBM Type 3
3-5
NO!
4
Enhanced
Individual
UTP
100Ω
±30Ω
EIA, TIA
10BASE-T
NEMA
5-8
NO!
5
Individual
UTP
100Ω
±30Ω
EIA, TIA
10BASE-T
8-10
YES
6
Individual
STP
150Ω
±30Ω
EIA, TIA
10BASE-T
8-10
YES
Alternative Installations
AT-MR908TX hubs can be installed within four different configurations:
standalone, cascaded, stacked and cascaded/stacked.
The following hub models can be used for standalone or cascaded hub
configurations:
❑
AT-MR908TX-10A
❑
AT-MR908TX-20A
❑
AT-MR908TX-30A
9
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.
Network nodes
AT-MR908TX hub
Figure 5: Standalone Configuration
The installation procedures are as follows:
1. Make sure that the package includes the required items:
AT-MR908TX hub
Power cord
Warranty card
This installation manual
10
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. Plug all 100BASE-TX cables into the 100BASE-TX network ports (RJ-45
connectors) on the back of the unit.
Port 1
Network ports
Power receptacle
MDI MDI-X switch (set to MDI-X)
Figure 6: Standalone AT-MR908TX Back Panel
7. Ensure that the MDI /MDI-X slide switch is set to MDI-X as shown in
Figure 6. This enables the use of Port 1 for a normal network connection.
8. Plug the opposite end of each 100BASE-TX cable into a network node or
workstation.
Note
The Collision Domain Diameter (total allowable distance end-to-end)
for a Class I repeater cannot exceed 200 meters. That is, the hub-todevice connection should never be more than 100 meters in length.
You are now ready to operate your AT-MR908TX hub in a standalone, Class I,
network configuration.
11
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 802.3u standard provides general rules for 100BASETX cable length and network connections on single segments of cable or on
point-to-point links with media attenuation and signal propagation delays.
The basic rule is that, in a Class II installation, each hub in the network is
viewed as a standalone hub and, therefore, the maximum number of hubs in
the data path between any two nodes cannot exceed two.
Cascaded Installation. You do not need to upgrade a standalone AT-MR908TX
hub to enable cascading. Connection is established between Port 1 on the first
hub and any port (2 through 8) on a second AT-MR908TX hub.
Figure 7 shows two AT-MR908TX hubs installed in a cascaded hub
configuration.
Port 2
(hub B)
Port 1
(hub A)
MDI/MDI-X
switch set
to MDI
Figure 7: Cascaded Hubs
12
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. Remove each hub to be included in the cascaded hub configuration from its
shipping package and store the box and packing materials in a safe place
in case the unit needs to be transferred in the future.
4. Arrange each AT-MR908TX hub such that the back panel on each hub is
within 5 meters (16.4 feet) of the other.
5. Insert the female end of the power cord into the Power Receptacle on the
back of the unit.
6. Insert the male end of the power cord into the into an electrical output of
the appropriate power.
7. Check the front panels to make sure the green power (PWR) LEDs are
illuminated.
8. As Figure 7 illustrates, Port 1 of Hub A is connected to one of the network
ports (Ports 2-8) on Hub B in the cascaded sequence. To enable the uplink
connection from Port 1, the MDI/MDI-X slide switch must be set to MDI.
9. Port 1 on the last hub in a sequence of cascaded hubs can be used for a
network connection to a node or workstation. The MDI/MDI-X slide switch
on this last hub must be set to MDI-X.
10. Double-check the front of each cascaded hub to make sure all green power
(PWR) LEDs are illuminated.
11. Plug all 100BASE-TX cables into the 100BASE-TX network ports
(connectors) on the back of the units.
12. Plug the opposite end of each 100BASE-TX cable into a network node or
workstation.
13
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**
216.2m**
*Assumes 100m of copper + one fiber link
**Assumes 105m of copper + one fiber link
Note
The Collision Domain Diameter for a Class II repeater cannot exceed
205 meters. That is, the hub-to-device connection should never be
more than 100 meters and the inter-repeater should be 5 meters
(Note, however, that this inter-repeater link can be greater if all
device-to-repeater links are shortened. You simply have to ensure
that the Collision Domain Diameter remains at 205 meters.)
You are now ready to operate your AT-MR908TX hubs in a cascaded hub
configuration.
14
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. (See Figure 8)
N
e
t
w
o
r
k
n
o
d
e
s
SCSI II
stacking
cables
Figure 8: Stacked Configuration
Note
You cannot connect a standalone hub (AT-MR908TX-10A, ATMR908TX-20A, AT-MR908TX-30A) in a stacked configuration unless
it has first been upgraded with the addition of an AT-MR901 stacking
module in the back panel of each unit.
15
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.
To prevent electrostatic damage, observe the following precautions:
Avoid hand contact by transporting and storing products in staticsafe containers. Keep electro-sensitive parts in their containers until
they arrive at static-free workstations. Place parts on a grounded
surface before removing them from their containers. Avoid touching
pins, leads, or circuitry and always be properly grounded when
touching a static-sensitive component or assembly.
2. Remove the four screws holding the blank faceplate on the back panel of
each AT-MR908TX hub and store this faceplate for future use.
3. Slide the AT-MR901 Stacking Module into the back panel port opening, as
shown in Figure 9. Ensure that the module is seated in the internal
connector and the module faceplate is flush with the surface of the back
panel.
AT-MR901 Stacking Module
Figure 9: Installing an AT-MR901 Stacking Module
16
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. Alternately, you can connect two ATMR908TX hubs with the stacking brackets included with AT-MR908TX19A, AT-MR908TX-29A, and AT-MR908TX-39A models, and with the ATMR901 Stacking Module upgrade package. Install the brackets as
indicated in Figure 10.
Stacking brackets
AT-MR908TX back panel
Figure 10: Installing Stacking Brackets
2. Attach the power cords of all units.
3. Use the SCSI II cable to connect the OUT port on the bottom unit with the
IN port on the upper unit.
4. Do not match OUT to OUT or IN to IN when connecting the stackable
ports of any pair of hubs.
5. Make sure the MDI /MDI-X slide switch on Port 1 of each hub is set to
MDI-X to use Port 1 for a normal network connection. (See Figure 6 on
page 11.)
6. Repeat the preceding Steps until you have connected up to a maximum of
six AT-MR908 hubs in a single stack
7. Check the front of each hub in the stack to make sure all green power
(PWR) LEDs are illuminated.
17
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.
A stacked/cascaded installation is simply two AT-MR908TX stacked hub
configurations which are joined through the cascading ports of any two
individual hubs in those stacks. This configuration will support up to 94
network nodes in a single collision domain. Cable lengths to the nodes will
need to be reduced to minimize signal delays in a stacked/cascaded
installation.
Note
Once you connect AT-MR908TX hubs in a stacked configuration, they
effectively become Class I repeaters. That is, while you can cascade
two stacked hub configurations, you must pay careful attention to
Ethernet repeater timing rules which limit the way repeaters may be
connected. Foremost among these rules is the collision domain timing
constraint which addresses the propagation delay of a network.
Specifically, the propagation delay through a network depends on its
physical extent. As a network grows, the worst-case packet
propagation time lengthens. If a network becomes too large, it may
violate the collision domain timing constraint which, in turn, may
cause late collisions, lost packets and generally poor performance.
In any individual collision domain, the round-trip propagation delay
must not exceed 512 bit times. The bit budget calculation method
should be used to determine if your stacked/cascaded installation will
satisfy Ethernet topology constraints.
This process will allow you to create two separate stacks of hubs which are
independent of each other. The procedures are straightforward. First, you are
referred to the information previously presented on stacking.
18
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.
Additionally, we recommend that cascading be performed using the bottom
most hubs to mitigate internal propagation delays.
Port 2
(hub B)
MDI/MDI-X
switch set
to MDI
Port 1
(hub A)
Figure 11: A Stacked/Cascaded Installation
19
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. 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 this communications test with all of the ports.
Note
When testing the cascade port (Port 1), connect the port to a computer
and select MDI-X using the MDI/MDI-X slide switch.
4. Verify the connection in each port by checking the Link/Activity LED and
performing the communications test as described in steps 2 and 3.
5. Once each port of a single AT-MR908TX hub has been tested, check the
connection between computers of two different AT-MR908TX hubs (if your
configuration has more than one hub). When cascading repeaters, always
select cascade mode on one repeater by using the MDI/MDI-X slide switch
to select MDI.
21
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.
Is the Link/Activity LED illuminated?The Link/Activity LEDs on the front of the
AT-MR908TX will illuminate when a proper connection between the
corresponding 100Base-TX port and the equipment connected to it is
established. If this LED is not illuminated, check for the problems listed below
and make corrections as necessary.
1. Problem 1:
The cable has been cut, damaged, or is the wrong type of cable.
❑
Solution 1:
— Try making the connection with a different cable. Be sure you are
using an undamaged cable of the correct type.
2. Problem 2:
Connected equipment is not turned on or not operating properly.
❑
Solution 2:
— Check the connected equipment (computer, another hub, etc.) and
turn on the power.
3. Problem 3:
The MDI/MDI-X slide switch of the AT-MR908TX is on the wrong setting.
❑
Solution 3:
— When using the cascade port of the AT-MR908TX, you should set
the switch to MDI; otherwise, the switch should be in the MDI-X
position.
— When cascading two AT-MR908TX hubs, the unit using the cascade
port should have the switch set to MDI, while the other unit should
have its switch set to MDI-X.
22
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.
23
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. Removing the center pin can be accomplished by
simply prying out the pin with a screwdriver blade and, subsequently,
using the screwdriver blade to separate the foot from the chassis.
Electrical and Mechanical Features
Standard:
IEEE 802.3u, 100BASE-TX Class I and II
unmanaged hub
Network Ports:
100BASE-TX ports for Fast Ethernet
with shielded RJ-45 connectors
Cooling:
Internal fan with left and right side air-intake
vents
25
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 MDI/MDI-X slide switch
❑
Power supply receptacle
❑
Optional In/Out port for stackable hubs
Partitioning: Auto-partitioning on ports with excessive collision
Cabling Specifications
❑
Type - STP/UTP Category 5 wiring, 100 ohm impedance
❑
Length - 5 meters between hubs; 100 meters between hub and network
node
Power: Internal universal power adapter supplying 100 to 240 VAC, 50/60 Hz.
26
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-20A
Standalone
200-240 VAC; power cord for Continental
Europe
AT-MR908TX-29A
Stackable
200-240 VAC; power cord for Continental
Europe
AT-MR908TX-30A
Standalone
200-240 VAC; power cord for United Kingdom
AT-MR908TX-39A
Stackable
200-240 VAC; power cord for United Kingdom
UTP (RJ-45) Connector
An RJ-45 connector is shown in Figure 11. For a 100BASE-TX link between hubs,
switches, repeaters—any two Medium Attachment Units (MAUs)—you will need
a crossover cable. For a connection to a Network Interface Controller (NIC), the
cable is wired straight through.
Figure 11: RJ-45 Connector
27
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. 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 Telco connectors to a patch panel and runs at 10 MHz.
100BASE-TX—Originally a Grand Junction Networks proposal for 100 Mbps Ethernet
using 2 pairs of Category 5 wire and CSMA/CD, it has been standardized by the IEEE as
802.3u.
50-PIN TELCO (RJ21)—This connector is very common in 10BASE-T wiring. As
opposed to the RJ-45 connector, the 50-pin Telco connector concentrates up to 12 UTP
connections onto one connection. This concentration of UTP ports is then broken out for
connection to a punch-down block inside a building’s wiring closet. 50-pin Telco
connections provide a very clean, uncluttered interface to the building’s wiring.
AT-ADAPT-2— A harmonica-style adapter that allows direct conversion from a 50-pin
Telco connector to RJ-45 receptacles.
ATTACHMENT UNIT INTERFACE (AUI)—Connection between a MAU
(transceiver) and a DTE (typically a workstation). Includes a 15-pin D-sub connector and
sometimes a 15-conductor twisted pair cable. Maximum length is 50 meters (164 ft.).
BACKUP MODULE—A repeater that behaves as the management module when the
Master fails in a department concentrator.
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.
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.
29
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.
COAX SEGMENT—A segment of Ethernet cable that contains MAUs.
COAXIAL CABLE—A two-conductor (center conductor, shield system), concentric,
constant impedance transmission line used as the trunk medium in the baseband
system.
COAXIAL CABLE SEGMENT—A length of coaxial cable sections and coaxial
connectors, terminated at each end in its characteristic impedance.
COLLISION—An unwanted condition that results from concurrent transmissions on
the physical medium.
COMPATIBILITY INTERFACE—The MDI coaxial cable interface and the AUI
branch cable interface, the two points at which hardware compatibility is defined to allow
connection of independently designed and manufactured components to the baseband
transmission system.
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.
D-SUB CONNECTOR—The AUI cable uses 15-pin D-sub connectors. “D” refers to the
shape of the connector shell. Also called miniature D, DB15, or DIX connectors.
DATA COMMUNICATION EQUIPMENT (DCE)—In RS-232 specification, a module,
such as a modem, for connecting a DTE to other equipment. A repeater connected to a
terminal or workstation for Omega management use is wired as a DCE.
DATA TERMINAL EQUIPMENT (DTE)—In RS-232 specification, a module typically
at the end of a segment (i.e., uninterrupted length of Ethernet cable). The DTE could be
an Ethernet workstation, repeater or bridge.
DEPARTMENT CONCENTRATOR—Hub that provides a large number of
workstation connections. The term department concentrator refers to multiple repeaters
housed in an AT-36C8 chassis. See Hub/Repeater, Repeater.
DIX CONNECTOR—See D-Sub Connector
HARMONICA ADAPTER—This adapter provides a simple way to convert the 50-pin
Telco connection to RJ-45 connections. See AT-Adapt-2.
HEARTBEAT—See SQE
30
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. It is used in a wiring topology
consisting of several point-to-point segments originating from a central point. The term
hub is often used interchangeably with the term repeater. Multiport 10BASE-T,
10BASE2 and fiber optic (10BASE-FL, FOIRL) repeaters are considered hubs. See
Repeater.
HUB-to-HUB WIRING—See MAU-to-MAU Wiring
HUB-to-MAU WIRING—UTP cables for 10BASE-T hub-to-MAU or NIC cards are
wired straight-through. An RJ-45 receptacle at the hub would wire pin-to-pin to the RJ45 receptacle at the MAU.
IMPEDANCE—An electrical characteristic of a circuit dealing with the combination of
the AC and DC resistance and the appearance of that resistance to attached circuits.
JABBER LOCK-UP—The MAU’s ability to automatically inhibit the transmit data
from reaching the medium if the transmit data time exceeds a specified duration. This
duration is in the range of 20 ms to 150 ms. Jabber lock-up protects the medium from
being overrun with data packets from a possibly defective device.
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 shift of the data bit in respect to a standard clock cycle. Jitter is
undesirable and must be minimized.
LINK SEGMENT—The link segment of coaxial cable is a segment that has no MAU
devices, but links together two LAN devices such as repeaters.
LINK TEST—In 10BASE-T Ethernet there is a link test function that validates the UTP
link. This consists of a pulse transmitted from point A on one pair that is validated at
point B. Point B also transmits a pulse on the second pair to be validated by point A.
These pulses occur during media idle states (in between packets).
MAU—See Medium Attachment Unit
MAU-to-MAU, HUB-to-HUB WIRING—10BASE-T MAU-to-MAU or hub-to-hub
wiring generally requires a cross-over cable located somewhere along the UTP cable run.
This may commonly occur at the punch-down block or between the RJ-45 wall receptacle
and the workstation.
MAU/TRANSCEIVER—An Ethernet transceiver is a MAU. A 10BASE-T MAU
interfaces the UTP media to an AUI port on a workstation, repeater, bridge or other
Ethernet device.
MDI/MDI-X—See Medium Dependent Interface
MEDIUM ATTACHMENT UNIT (MAU)—In a LAN, a device used in a data station to
couple the DTE to the transmission medium.
31
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. The patch panel generally has a female RJ-45 connector on the
front for each workstation and a Telco (RJ21) connector on the back, which is wired to a
punch-down block. This provides a convenient way for the installer or network manager
to connect the hub 10BASE-T ports into the desired building locations.
POLARITY CORRECTION—Many 10BASE-T UTP ports have a polarity correction
function. If the UTP wiring has RD- and RD+ inadvertently crossed, the polarity
correction function will sample the signal and electrically swap the wires. If the TD- and
TD+ wires are crossed, the correction would occur at the MAU on the other end of the
UTP link. This occurs within a single pair and should not be confused with the crossover
cable.
PUNCH-DOWN BLOCK—The punch-down block is the wiring panel where the house
wiring from the building’s offices terminates. This is where many
10BASE-T hubs would be located. Wiring installers use a special punch-down tool to
insert the UTP wire for data and voice applications.
REPEATER—A device used to extend the length, topology, or interconnectivity of the
physical medium beyond that imposed by a single segment, up to the maximum
allowable end-to-end trunk transmission line length. Repeaters perform the basic actions
of restoring signal amplitude, waveform and timing applied to normal data and collision
signals.
RJ-45—This connector is a 10BASE-T and 100BASE-T standard and is used to connect
STP/UTP cabling. It is inexpensive and easy to install onto UTP cable.
Shielded Twisted Pair (STP)—Two, or more, insulated wires that are twisted
together and then wrapped in a cable with metallic braid or foil to prevent interference
and offer noise-free transmissions. Also refers to IBM Type 1 cable. c
SIGNAL QUALITY ERROR (SQE)—Also referred to as Collision or Collision
Presence. This occurs when two devices attempt to transmit at the same time, which is
an illegal condition. All ATI transceivers test for SQE.
SQE TEST—Commonly referred to as Heartbeat, is a special 802.3 signal sent by the
MAU to the DTE to test the collision detection function. Some DTE want SQE and others
do not. Repeaters do not want the SQE Test.
STANDALONE—Repeater operating as a hub on its own; i.e., not a module among other
modules in a department concentrator chassis.
STRAIGHT-THROUGH—A type of wiring connection where the pins of one connector
connect to the same pins of another connector. For example, pin 1 of one connector
connects to pin 1 of another connector.
TELCO CONNECTOR— A 50-pin receptacle that plugs into the front of the hub,
enabling cables from external devices to connect to the hub.
THICK ETHERNET—See 10BASE5
32
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.
33
Appendix C
Technical Support Fax Order
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 ________________________________________
______________________________________________________________________
Brief summary of problem _________________________________________________
______________________________________________________________________
Conditions (List the steps that led up to the problem.) ___________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
Detailed description (Use separate sheet, if necessary)
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
When completed, fax this sheet to the appropriate ATI office. Fax numbers can be found
on page 39.
35
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.
I found the following the most valuable _______________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
______________________________________________________________________
I would like the following more developed _____________________________________
______________________________________________________________________
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______________________________________________________________________
______________________________________________________________________
I would find the manual more useful if ________________________________________
______________________________________________________________________
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______________________________________________________________________
Please fax or mail your feedback. Fax to 1-206-481-3790. Or mail to:
Allied Telesyn International Technical Communications Department
19015 North Creek Parkway, #200
Bothell, WA 98011 USA
37
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) 2-38093-448
United Kingdom
United Kingdom, Denmark, Norway, Sweden, Finland,
Iceland
(+0) 800-20-40-40
(+44) 1-865-390-002
Japan
(+81) 3-3443-5640
(+81) 3-3443-2443
Asia
Singapore, Taiwan, Thailand, Malaysia, Indonesia,
Korea, Philippines, China, India
(+65) 383-2050
(+65) 383-2079
Hong Kong
(+852) 2-529-4111
(+852) 2-529-7661
Technical Bulletin Board Service
1 (206) 483-7979
CompuServe
Go ALLIED
World Wide Web
http://www.alliedtelesyn.com
For Information Regarding Allied Telesyn International Corp.
Allied Telesyn International Corp.
19015 North Creek Parkway Suite 200
Bothell, WA 98011
Tel: 1 (800) 424-4284 or 1 (206) 487-8880
Fax: 1 (206) 489-9191
Allied Telesyn International Corp.
950 Kifer Road
Sunnyvale, CA 94086
Tel: 1 (800) 424-4282 (USA and Canada)
Fax: 1 (408) 736-0100
39
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. Louis, MO
Tel: (314) 894-6161, Fax: (314) 894-3773
Los Angeles, CA
Tel: (310) 412-8684, Fax: (310) 412-8685
Costa Mesa, CA
Tel: (714) 432-6424, Fax: (714) 432-6546
San Diego, CA
Tel: (619) 279-3896, Fax: (619) 279-3897
Clearwater, FL
Tel: (813) 726-0022, Fax: (813) 726-0234
Plaistow, NH
Tel: (603) 382-0815, Fax: (603) 383-0818
Turnersville, NJ
Tel: (609) 469-1070, Fax: (609) 468--1201
Dayton, OH
Tel: (513) 438-2025, Fax: (513) 438-2026
Australia
Rexdale, Ontario
Tel: (416) 675-6738, Fax: (416) 675-0057
Richmond, British Columbia
Tel: (604) 244-0678, Fax: (604) 270-3644
Germany
Lindfield, NSW
Tel: (612) 416-0619, Fax: (612) 416-9764
40
Berlin
Tel: (+49) 30-435-90-00, Fax: (+49) 30-435-706-50
Freising
Tel: (+49) 8161-9906-0, Fax: (+49) 8161-9906-22
Italy
Milano
Tel: (+39) 2-416047, Fax: (+39) 2-419282
England
Abingdon, Oxon
Tel: (+44) 1235-442500, Fax: (+44) 1235-442490
France
Les Ulis
Tel: (+33) 169-28-16-17, Fax: (+33) 169-28-37-49
Hong Kong
Wanchai
Tel: (+852) 2-529-4111, Fax: (+852) 2-529-7661
Singapore
Tel: (+65) 383-3832, Fax: (+65) 383-3830
Japan
Yodogawa-ku, Osaka
Tel: (+81) 6-391-6310, Fax: (+81) 6-391-6325
Machida-shi, Tokyo
Tel: (+81) 427-21-8141, Fax: (+81) 427-21-8848
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 802.3u 2, 8
IEEE 802.3u standard 1
incident summary 35
Indicators
power 5
indicators
collision 5
error 5
link/activity 5
utilization 5
Internal fan 2
L
Link/Activity LEDs 4
M
MDI-X 5
Medium Attachment Unit (MAU) 27
N
Network Interface Controller (NIC) 27
network nodes 1
network status 4
P
Package Contents 2
performance montoring 4
physical characteristics 25
Power cord 2
power receptacle 5
power supply 7
product models 3, 27
R
rackmount installation 3
RJ45 port 4
S
SCSI II 2
specifications 25
stacked installation 15
stacked/cascaded installation 18
stacking module 16
standalone 5
standalone installation 10
STP 2
STP ports 2
system status 4
T
temperature 2
U
uplink toggle switch 5
Utilization 4
41
Index
V
valid connection 21
ventilation 7
Voltage/Power Cord Requirement 3, 27
W
Warranty 2
wiring 27
42