STH-22/-24/-42/-44 STACKABLE TOKEN RING HUB USER’S GUIDE CABLETRON SYSTEMS, P. O.
NOTICE 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. The hardware, firmware, or software described in this manual is subject to change without notice.
NOTICE 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. NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules.
NOTICE CABLETRON SYSTEMS, INC. PROGRAM LICENSE AGREEMENT IMPORTANT: Agreement. Before utilizing this product, carefully read this License This document is an agreement between you, the end user, and Cabletron Systems, Inc. (“Cabletron”) that sets forth your rights and obligations with respect to the Cabletron software program (the “Program”) contained in this package. The Program may be contained in firmware, chips or other media.
NOTICE 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 UNITED STATES GOVERNMENT RESTRICTED RIGHTS The enclosed product (a) was developed solely at private expense; (b) contains “restricted computer software” submitted with restricted rights in accordance with Section 52227-19 (a) through (d) of the Commercial Computer Software Restricted Rights Clause and its successors, and (c) in all respects is proprietary data belonging to Cabletron and/or its suppliers.
CONTENTS CONTENTS CHAPTER 1 INTRODUCTION 1.1 Using This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.2 STH Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.2.1 LANVIEW LEDs . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1.2.2 TCU Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1.2.3 Automatic Beacon Recovery Process . . . . . . . . 1-4 1.2.4 Support for Passive MAU Workgroups . . . . . . 1-4 1.
CONTENTS 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. . . . . . . 3-1 3.2.2 Adding the STH to a Stack . . . . . . . . . . . . . . . . . 3-2 3.2.3 Attaching the Strain Relief Bracket . . . . . . . . . . 3-3 3.2.4 Rack-Mounting the STH . . . . . . . . . . . . . . . . . . . 3-3 3.2.5 Wall-Mounting the STH . . . . . .
CHAPTER 1 INTRODUCTION Welcome to the Cabletron Systems STH-22/-24/-42/-44 Stackable Token Ring Hub User’s Guide. The STH (Stackable Token Ring Hub) is a nonintelligent hub designed to provide expanded connectivity for Cabletron Systems’ STHi intelligent hubs and Cabletron Systems MicroMMAC intelligent hubs. This manual provides installation instructions and reference information for STH models 22, 24, 42, and 44.
STH Overview Connector Ports (TCUs) for connections to stations and other network devices. ® HubSTACK TOKEN RING HUB with LANVIEW SUPPORTING 100 OHM UTP CABLE STH-24 24X 23X 22X 21X 20X 19X 18X 17X 16X 11X 10X 9X 8X 7X 6X 5X 4X 15X 14X 13X PWR 16Mb/s STACK 4M 16M SPEED 12X STH-24 3X 2X 1X TOKEN RING HUB with LANVIEW® SN RESERVED STACK Figure 1-1.
LANVIEW LEDs 1.2.1 LANVIEW LEDs Cabletron Systems’ LANVIEW Status Monitoring and Diagnostics System is a troubleshooting tool. Conveniently located on the front panel, LANVIEW LEDs help the user to quickly identify power failures, beaconing conditions, cable faults, and link problems. Refer to Section 4.1, LANVIEW LED Signals for more information on the LANVIEW LED visual status monitoring system. 1.2.2 TCU Ports Each STH, depending on the STH model (see Table 1-1.
Automatic Beacon Recovery Process wrong ring speed. If a ring speed mismatch is detected, the STH disables the port to keep the misconfigured station isolated from the ring and provides a simple visible LED signal (blinking red at the port’s LED) to indicate to the user that Speed Fault Protection has disabled the port. The port remains disabled until the ring speed mismatch condition is removed or resolved.
Related Manuals 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 reconfigured to its RO (Ring Out) setting to support connections to passive MAU (MultiStation Access Unit) workgroups.
Related Manuals DAISY-CHAIN MAU CONFIGURATION Multi-Station Access Units When MAUs are daisy-chained, they are connected as single collective entity. The entire chain must be bypassed to isolate the hub from a single beaconing station. All stations lose connection if beaconing occurs on any station.
Getting Help 1.4 Getting Help If you need additional support related to the Cabletron Systems STH, or if you have any questions, comments, or suggestions concerning this manual, contact Cabletron Systems Technical Support: By phone: By CompuServe®: By Internet mail: (603) 332-9400 Monday-Friday; 8am - 8pm EST GO CTRON from any ! prompt support@ctron.com By Fax: (603) 337-3075 By BBS: (603) 337-3750 By mail: Cabletron Systems, Inc. P.O.
CHAPTER 2 REQUIREMENTS & SPECIFICATIONS This chapter describes network guidelines, power requirements, and operating specifications for the STH. Before installing the STH, read this chapter and confirm that the network meets the requirements and conditions specified in this chapter. Failure to follow these guidelines could result in poor network performance. 2.1 General Considerations All devices connected to the STH must meet IEEE 802.5 Token Ring specifications.
General Considerations to re-route cabling away from potential noise sources, or to ensure that the electrical wiring in the area is properly wired and grounded, or to replace connectors along affected segments. Temperature The attenuation of PVC-insulated cable varies significantly with temperature. Check the cable manufacturer’s specifications. Plenumrated cables are strongly recommended in areas where temperatures exceed 40˚C.
Cable Specifications • 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 Take care in planning and preparing the cabling and connections for the network. The susceptibility of the LAN’s cables to crosstalk and noise determines the network’s error rate, and thus, the reliability of data propagation on the network.
UTP Cable Categories Table 2-1. UTP Cable Category Specifications UTP Cat. Operating Frequency Electrical Impedance Signal Attenuation per 100m NEXT loss (@ ≥100m) 4 MHz ≤ 100Ω ±15% ≤ 5.6 dB ≥ 32 dB 16 MHz ≤ 100Ω ±15% ≤ 13.1 dB ≥ 23 dB* 4 MHz ≤ 100Ω ±15% ≤ 4.3 dB ≥ 47 dB 16 MHz ≤ 100Ω ±15% ≤ 8.9 dB ≥ 38 dB 4 MHz ≤ 100Ω ±15% ≤ 4.3 dB ≥ 63 dB 16 MHz ≤ 100Ω ±15% ≤ 8.2 dB ≥ 44 dB 3 4 5 *below Token Ring performance requirement of ≥ 30.5 dB.
UTP Lobe Lengths 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 referred to as the lobe length. The maximum lobe length attainable with the concentrator, under ideal conditions, is shown in Table 2-2. Cable routing, connector attenuation, noise, and crosstalk can adversely affect the maximum lobe length. Table 2-2.
STP Cable Categories 2.4.1 STP Cable Categories The supported STP cable types meet the following specifications: Table 2-3. STP Cable Type Specifications. IBM Type Attenuation per... Operational Frequency Impedance 4 MHz 1000 m (1000 ft) ≤ 150Ω ±15% ≤ 22 dB (≤ 6.7 dB) 16 MHz ≤ 150Ω ±15% ≤ 45 dB (≤ 13.7 dB) 4 MHz ≤ 150Ω ±15% ≤ 33 dB (≤ 10.0 dB) 16 MHz ≤ 150Ω ±15% ≤ 66 dB (≤ 20.0 dB) 1&2 6&9 IBM Type 1 consists of two shielded twisted pairs (STP) of 22 AWG solid wire for data.
TCU Specifications 2-4. Cable routing, connector attenuation, noise and crosstalk can adversely affect the maximum lobe length. Table 2-4. STP Maximum Lobe Lengths. STP Types @ 4 Mb/s @ 16 Mb/s meters (feet) meters (feet) 1&2 300 (984) 150 (492) 6&9 200 (656) 100 (328) Mixed STP Cable Types If cable types are to be mixed in the LAN, compensations must be made for the different cable attenuations.
Operating Specifications 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. Shielded patch cables that adapt a shielded RJ45 to a Media Interface Connector (MIC) are available from Cabletron Systems in eight-foot lengths.
Ring Sequence 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. To return to switch control from an MIB overridden Ring Speed setting: 1. Regain switch control. Change the current switch setting and powercycle the STH.
Environmental Requirements under all conditions of line at full load. The minimum and maximum load current from each output is shown below. Table 2-5. Power Supply Loads 2.6.4 Output Min. Load Max. Load Max Power +5 Volts 0.50 Amps 3.0 Amps 15 Watts +12 Volts 0.05 Amps 1.0 Amps 12 Watts Environmental Requirements Operating Temperature: +5° to +50° C Non-operating Temperature: -30° to +90° C Operating Humidity: 2.6.
CHAPTER 3 INSTALLATION This chapter outlines the procedure for installing the STH and adding it to a stack. Confirm that the network meets the guidelines and requirements outlined in Chapter 2, Installation Requirements/ Specifications, before installing the STH. 3.1 Unpacking the STH Unpack the STH as follows: 1. Carefully remove the STH from the shipping box. Preserve the shipping box and packing materials for future use. 2. Visually inspect the STH.
Adding the STH to a Stack 3.2.2 Adding the STH to a Stack STH hubs are star-wired to the intelligent hub. To add STH hubs to a stack, refer to Figure 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. 2. Attach the other end of the cable to one of the numbered STACK ports on the back panel of the intelligent hub.
Attaching the Strain Relief Bracket 3.2.3 Attaching the Strain Relief Bracket Attach the strain relief bracket to the front 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. Warning: Use of longer screws may cause damage to the unit or electrical shock. 2. Carefully turn the STH upside down. 3. Attach the strain relief bracket to the bottom of the STH as shown in Figure 3-2.
Wall-Mounting the STH Rack Mounting Brackets (2) ® HubSTACK TOKEN RING HUB with LANVIEW SUPPORTING 100 OHM UTP CABLE STH-24 24X 23X 22X 21X 20X 19X 18X 17X 16X 11X 10X 9X 8X 7X 6X 5X 4X 15X 14X 13X PWR 16Mb/s STACK 4M 16M SPEED 12X 3X 2X 1X Screws (4) Figure 3-3.
Wall-Mounting the STH Figure 3-5. Installing the Wall Mounting Brackets 2. Select the wall location for the STH within 7 feet of a power outlet. Warning: There is a SHOCK HAZARD whe drilling into walls containing electrical wiring. Select a wall location where drill bits and screw anchors will not come in contact with electrical wiring in the wall. 3. Get a pencil.
Free-Standing Installation Solid Wall Anchor Wall Mounting Bracket attached to STH Mounting Screws Pre-Drilled Holes with Anchors Hollow Wall Anchor 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 free surface area 21 inches wide, 18 inches deep and 6 inches high, within 7 feet of its power source, as shown in Figure 3-7. 21 IN. 18 IN.
Connecting the STH to the Power Source 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. To connect the STH to the power source: 1. Plug the power cord into the back panel of the STH. 2. Plug the other end of the power cord into a grounded wall outlet. 3. Verify that the PWR LED is on, this indicates that the STH is receiving power. 3.2.
Finishing the Installation 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 Technical Support. 3.3 Finishing the Installation The STH is now ready for operation. Before placing the network into service, test the installation thoroughly, making sure that all stations are addressable and that the STH and all stations are indicating normal operation.
CHAPTER 4 TROUBLESHOOTING This chapter contains instructions for using LANVIEW LEDs to troubleshoot physical layer network problems. 4.1 LANVIEW LED Signals The STH incorporates the Cabletron Systems LANVIEW Status Monitoring and Diagnostics System. LANVIEW LEDs can help diagnose problems such as a power failure or a cable fault. The STH includes the following LANVIEW LEDs: Table 4-1. LED Signals LED Color Condition Green Power on. off Power off. Yellow Ring Speed set to 16 Mbps.
Trouble Resolution Loss Of Power If the STH is having power problems, check the power delivery system (power cable, power outlet, circuit breaker, fuse). Loss of Contact with Intelligent Hub If the STACK LED is indicating disconnection from the intelligent hub, it may be that the intelligent hub has placed the STH in bypass to protect itself from beaconing conditions or a mismatched ring speed on the STH.
