Manuale d’uso / di manutenzione del prodotto 42 del fabbricante Cabletron Systems
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CABLETRON SYSTEMS, P. O. Box 5005, Rochester, NH 03866-5005 STH-22/-24/-42/-44 STACKABLE TOKEN RING HUB USER’S GUIDE.
NOTICE iii NOTICE Cabletron Systems reserves the right to make changes in specifications and other information contained in this document without prior notice. The reader should in all cases consult Cabletron Systems to determine whether any such changes have been made.
NOTICE iv FCC Notice This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
NOTICE v CABLETRON SYSTEMS, INC. PROGRAM LICENSE AGREEMENT IMPORTANT: Before utilizing this product, carefully read this License Agreement. This document is an agreement between you, the end user, and Cabletron Systems, Inc.
NOTICE vi EXCLUSION OF WARRANTY AND DISCLAIMER OF LIABILITY 1. EXCLUSION OF WARRANTY. Except as may be specifically provided by Cabletron in writing, Cabletron makes no warranty, expressed or implied, concerning the Program (including Its documentation and media).
NOTICE vii UNITED STATES GOVERNMENT RESTRICTED RIGHTS The enclosed product (a) was developed solely at private expense; (b) contains “restricted computer software” submitted with restricted rights.
CONTENTS ix CONTENTS CHAPTER 1 INTRODUCTION 1.1 Using This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.2 STH Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.2.1 LANVIEW LEDs . . . . . . . .
CONTENTS x CHAPTER 3 INSTALLATION 3.1 Unpacking the STH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.2 Installing the STH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.2.1 Rack Mount or Wall Mount Hardware. . . .
Page 1-1 CHAPTER 1 INTR ODUCTION W elcome to the Cabletron Systems STH-22/-24/-42/-44 Stackable Token Ring Hub User’s Guide . The STH (Stackable Token Ring Hub) is a non- intelligent hub designed to provide expanded connectivity for Cabletr on Systems’ STHi intelligent hubs and Cabletron Systems Micr oMMAC intelligent hubs.
STH Overview Page 1-2 Connector Ports (TCUs) for connections to stations and other network devices. Figure 1-1. Front and Back Views of the STH-24 Up to four STH hubs can be linked to the same intelligent hub, bringing the total direct connectivity potential to 120 managed TCU ports in the stack.
LANVIEW LEDs Page 1-3 1.2.1 LANVIEW LEDs Cabletron Systems’ LANVIEW Status Monitoring and Diagnostics System is a troubleshooting tool. Conveniently located on the fr ont panel, LANVIEW LEDs help the user to quickly identify power failures, beaconing conditions, cable faults, and link problems.
Automatic Beacon Recovery Process Page 1-4 wrong ring speed. If a ring speed mismatch is detected, the STH disables the port to keep the misconfigured station isolated fr om the ring and provides a simple visible LED signal (blinking r ed at the port’s LED) to indicate to the user that Speed Fault Protection has disabled the port.
Related Manuals Page 1-5 By default, each of the STH hub’s TCU ports is configured to its STN (station) setting to support concentrator lobe connections to stations. Through Local Management, any TCU port may be r econfigured to its RO (Ring Out) setting to support connections to passive MAU (Multi- Station Access Unit) workgroups.
Related Manuals Page 1-6 Figure 1-2. Improved Beacon Recovery Resolution for MAUs (8 Stations) (8 Stations) (8 Stations) (8 Stations) STH TCUs Ring Out Ring Out Ring Out Ring Out Multi-Station Access .
Getting Help Page 1-7 1.4 Getting Help If you need additional support related to the Cabletr on Systems STH, or if you have any questions, comments, or suggestions concerning this manual, contact Cabl.
Page 2-1 CHAPTER 2 REQUIREMENTS & SPECIFIC A TIONS This chapter describes network guidelines, power requir ements, and operating specifications for the STH. Before installing the STH, r ead this chapter and confirm that the network meets the requir ements and conditions specified in this chapter .
General Considerations Page 2-2 to re-r oute cabling away from potential noise sour ces, or to ensure that the electrical wiring in the area is pr operly wired and gr ounded, or to replace connectors along af fected segments. Temperature The attenuation of PVC-insulated cable varies significantly with temperature.
Cable Specifications Page 2-3 • Where practical, dedicated cable should be used for Token Ring signals. • Work area wall plates and outlets used for the Token Ring network should be clearly labeled as Token Ring network lobe connections. 2.2 Cable Specifications T ake care in planning and pr eparing the cabling and connections for the network.
UTP Cable Categories Page 2-4 Category 3 consists of (usually) four Unshielded T wisted Pairs of 24 A WG solid wire for data or voice communication. (IBM T ype 3 is coincidentally the same as UTP Category 3.) It is typically used to wir e cable runs within the walls of buildings.
UTP Lobe Lengths Page 2-5 UTP cabling to any non-Token Ring network conductors (telephone, etc.) or ground. If in doubt, test wiring before using. 2.3.2 UTP Lobe Lengths The physical length of the cable connecting a station to a TCU port on the concentrator is referr ed to as the lobe length .
STP Cable Categories Page 2-6 2.4.1 STP Cable Categories The supported STP cable types meet the following specifications: IBM T ype 1 consists of two shielded twisted pairs (STP) of 22 A WG solid wire for data. Used for the longest cable r uns within the walls of buildings.
TCU Specifications Page 2-7 2-4. Cable routing, connector attenuation, noise and cr osstalk can adversely affect the maximum lobe length. Mixed STP Cable Types If cable types are to be mixed in the LAN, compensations must be made for the differ ent cable attenuations.
Operating Specifications Page 2-8 On STH models -42/-44, each RJ45 connector is encased in a metallic shield which provides a means of connection for the STP cable shield. Shield continuity is maintained by contacts within the female RJ45 that contact the metallic casing of the male RJ45 on the STP lobe cabling.
Ring Sequence Page 2-9 Note: When cancelling a MIB override, the user may have to perform the switch and power-cycle procedure twice (as described in the steps below) to actually change the STH hub’s ring speed by the switch. T o return to switch contr ol from an MIB overridden Ring Speed setting: 1.
Environmental Requirements Page 2-10 under all conditions of line at full load. The minimum and maximum load current fr om each output is shown below . 2.6.4 En vironmental Requirements Operating Temperature: +5 ° to +50 ° C Non-operating Temperature: -30 ° to +90 ° C Operating Humidity: 5 to 95% (non-condensing) 2.
Page 3-1 CHAPTER 3 INST ALLATION This chapter outlines the procedur e for installing the STH and adding it to a stack. Confirm that the network meets the guidelines and requir ements outlined in Chapter 2, Installation Requirements/ Specifications , before installing the STH.
Adding the STH to a Stack Page 3-2 3.2.2 Adding the STH to a Stack STH hubs are star -wired to the intelligent hub. T o add STH hubs to a stack, refer to Figur e 3-1 and perform the following steps: 1. Attach an STH HubSTACK Interconnect cable to the "STACK" port on the rear panel of an STH.
Attaching the Strain Relief Bracket Page 3-3 3.2.3 Attaching the Strain Relief Bracket Attach the strain relief bracket to the fr ont of the STH as follows: 1. Locate the strain relief bracket and four 8-32 x 3/8" screws from the STH-ACCY-KIT package.
Wall-Mounting the STH Page 3-4 Figure 3-3. Installing the Rack-Mount Brackets Figure 3-4. Installing the STH in a Rack 3.2.5 Wall-Mounting the STH When an STH is installed on a wall, its cable connections must face down to prevent the sideways str esses of hanging cables from compr omising the connection at the port.
Wall-Mounting the STH Page 3-5 Figure 3-5. Installing the Wall Mounting Brackets 2. Select the wall location for the STH within 7 feet of a power outlet.
Free-Standing Installation Page 3-6 Figure 3-6. Wall-mounting the STH 3.2.6 Free-Standing Installation For a free-standing shelf or tabletop installation, install the STH on an unrestricted fr ee surface area 21 inches wide, 18 inches deep and 6 inches high, within 7 feet of its power source, as shown in Figur e 3-7.
Connecting the STH to the Power Source Page 3-7 3.2.7 Connecting the STH to the Power Source Note : The STH has a universal power supply which will accept power sources from 90 Vac to 264 Vac, 47-63 Hz. T o connect the STH to the power source: 1. Plug the power cord into the back panel of the STH.
Finishing the Installation Page 3-8 c. Check that the twisted pair connection meets dB loss and cable specifications outlined Chapter 2. If a link still has not been established, contact Cabletron Systems T echnical Support. 3.3 Finishing the Installation The STH is now ready for operation.
Page 4-1 CHAPTER 4 TR OUBLESHOO TING This chapter contains instructions for using LANVIEW LEDs to troubleshoot physical layer network pr oblems. 4.1 LANVIEW LED Signals The STH incorporates the Cabletron Systems LANVIEW Status Monitoring and Diagnostics System.
Trouble Resolution Page 4-2 Loss Of Power If the STH is having power problems, check the power delivery system (power cable, power outlet, circuit br eaker , fuse).
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Cabletron Systems 42 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Cabletron Systems 42 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Cabletron Systems 42 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Cabletron Systems 42 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Cabletron Systems 42, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Cabletron Systems 42.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Cabletron Systems 42. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Cabletron Systems 42 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
