SEH100TX-22 100BASE-T STACKABLE HUB USER’S GUIDE ®
Only qualified personnel should perform installation procedures. 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 DOC NOTICE This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications. Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de la class A prescrites dans le Règlement sur le brouillage radioélectrique édicté par le ministère des Communications du Canada.
Notice CABLETRON SOFTWARE PROGRAM LICENSE 1. LICENSE. You have the right to use only the one (1) copy of the Program provided in this package subject to the terms and conditions of this License Agreement. You may not copy, reproduce or transmit any part of the Program except as permitted by the Copyright Act of the United States or as authorized in writing by Cabletron. 2. OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble the Program. 3. APPLICABLE LAW.
Notice DECLARATION OF CONFORMITY Application of Council Directive(s): Manufacturer’s Name: Manufacturer’s Address: European Representative Name: European Representative Address: Conformance to Directive(s)/Product Standards: Equipment Type/Environment: 89/336/EEC 73/23/EEC Cabletron Systems, Inc. 35 Industrial Way PO Box 5005 Rochester, NH 03867 Mr. J.
CONTENTS CHAPTER 1 INTRODUCTION 1.1 Using This Manual....................................................................... 1-1 1.2 Document Conventions ............................................................... 1-2 1.3 Getting Help................................................................................. 1-3 1.4 Related Manuals.......................................................................... 1-4 CHAPTER 2 SEH FEATURES AND OPTIONS 2.1 SEH Overview ......................................
Contents CHAPTER 4 INSTALLATION 4.1 Unpacking the SEH......................................................................4-1 4.2 Tabletop or Shelf Installation .......................................................4-2 4.3 Rackmount Installation.................................................................4-3 4.4 Powering Up and Stacking the SEH ............................................4-5 4.4.1 Stacking SEH Hubs with an SEHI ...................................4-6 4.4.
CHAPTER 1 INTRODUCTION Welcome to the Cabletron Systems SEH100TX-22 100BASE-T Stackable Hub User’s Guide. This manual provides installation instructions, troubleshooting and reference information for the SEH100TX-22. NOTE 1.1 The terms SEH (Stackable Ethernet Hub) and SEHI (Stackable Ethernet Hub with Intelligence) are used throughout this manual when referring to the SEH100TX-22 and the SEHI100TX-22, respectively.
Chapter 1: Introduction 1.2 DOCUMENT CONVENTIONS The following conventions are used throughout this document: NOTE TIP ! Note symbol. Calls the reader’s attention to any item of information that may be of special importance. Tip symbol. Conveys helpful hints concerning procedures or actions. Caution symbol. Contains information essential to avoid damage to the equipment. CAUTION Electrical Hazard Warning symbol.
Getting Help 1.3 GETTING HELP If you need additional support related to this device, or if you have any questions, comments, or suggestions concerning this manual, contact Cabletron Systems Technical Support: Phone (603) 332-9400 Monday – Friday; 8 A.M. – 8 P.M. Eastern Time CompuServe GO CTRON from any ! prompt Internet mail support@ctron.com FTP Login Password ctron.com (134.141.197.
Chapter 1: Introduction 1.4 RELATED MANUALS Use the Cabletron Systems SEHI100TX-22 100BASE-T Intelligent Stackable Hub User’s Guide to supplement the procedures and other technical data provided in this manual. The procedures contained in the SEHI100TX-22 100BASE-T Intelligent Stackable Hub User’s Guide are referenced where appropriate, but not repeated in this manual.
CHAPTER 2 SEH FEATURES AND OPTIONS This chapter provides an overview of the SEH (Figure 2-1) and contains sections detailing the features and available options. NOTE The abbreviations SEH (Stackable Ethernet Hub) and SEHI (Stackable Ethernet Hub with Intelligence) are used throughout this manual when referring to the SEH100TX-22 and the SEHI100TX-22, respectively.
Chapter 2: SEH Features and Options 2.1 SEH OVERVIEW The SEH100TX-22 is a repeating hub providing 22 RJ45 ports and two Ethernet Port Interface Module (EPIM) ports on the front panel for network connections. The SEH has two rear panel Interconnect Bus ports for stackable connections. The front panel EPIM ports support the EPIM-100TX, EPIM-100FX, and the EPIM-100FMB. The SEH100TX-22 is designed to be managed by the Cabletron Systems intelligent stackable hub, the SEHI100TX-22.
Stackable Capabilities LANVIEW LEDs Cabletron Systems LANVIEW status monitoring and diagnostics system is a troubleshooting tool that helps in diagnosing power failures, collisions, cable faults, and link problems. The LANVIEW LEDs are conveniently located on the SEH front panel. 2.3 STACKABLE CAPABILITIES The SEH100TX-22 is a non-intelligent hub designed to be managed by the Cabletron Systems SEHI100TX-22 intelligent hub.
Chapter 2: SEH Features and Options 2.5 OPTIONAL EPIMs EPIMs are not included with the SEH, but they can be purchased separately from Cabletron Systems. EPIMs enable the expansion of a network through different types of media.
CHAPTER 3 INSTALLATION REQUIREMENTS AND SPECIFICATIONS This chapter describes cabling requirements, network guidelines, and operating specifications for the SEH100TX-22. ! CAUTION 3.1 The network must meet the requirements and conditions specified in this chapter to obtain satisfactory performance from this equipment. Failure to follow these guidelines could result in poor network performance.
Chapter 3: Installation Requirements and Specifications 3.1.2 UTP Cable Specifications The device at the other end of the twisted pair segment must meet IEEE 802.3u 100BASE-T specifications. When connecting a 100BASE-TX twisted pair segment to the SEH twisted pair network ports and the EPIM-100TX module, the network must meet the following requirements: Length The IEEE 802.
Cable Specifications Propagation Delay Propagation delay is the amount of time it takes data to travel from the sending device to the receiving device. Total propagation delay allowed for the network is 256 bit times (2.56 µs) in one direction (5.12 µs round trip). If the total propagation delay between any two nodes on the network exceeds 2.56 µs, then use bridges or other devices to further segment the network. Temperature The attenuation of PVC insulated cable varies significantly with temperature.
Chapter 3: Installation Requirements and Specifications 3.2 NETWORK CABLE LENGTHS This section details the maximum network cable lengths specified by the IEEE 802.3u standard for a Class I repeater. As stated previously, the physical size of the network is limited primarily by propagation delay. The round trip delay cannot exceed 512 bit times or 5.12 µs. NOTE A stack of five SEH hubs or four SEH hubs and one SEHI hub is equivalent to one repeater.
Network Port Specifications Table 3-1 summarizes the maximum segment lengths for the type and combination of cables used with a Class I repeater. ! The maximum length of an individual UTP segment may be no more than 100 meters for proper operation. CAUTION Table 3-1 Number of Repeaters 1 3.
Chapter 3: Installation Requirements and Specifications 3.4 OPERATING SPECIFICATIONS This section details power supply and environmental requirements. 3.4.1 Power Supply Requirements The SEH has a universal power supply. The input power requirements are listed in Table 3-2. Table 3-2 Power Requirements Line Input Range Current 100–125 Vac 4.0 A 200–250 Vac 2.0 A Frequency 50/60 Hz 3.4.2 Environmental Requirements The environmental requirements for the SEH are detailed in this section.
Physical Specifications 3.5.3 Immunity This unit meets the requirements of EN 50082-1 including IEC 801-2 (ESD), IEC 801-3 (Radiated Susceptibility), and IEC 801-4 (EFT/B). 3.6 PHYSICAL SPECIFICATIONS This section details the physical specifications for the SEH. Dimensions (H x W x D): 2.8 in x 17.0 in x 13.5 in (7.2 cm x 43.6 cm x 34.6 cm) Weight: 7 lb (3.
Chapter 3: Installation Requirements and Specifications 3-8 SEH100TX User’s Guide
CHAPTER 4 INSTALLATION This chapter outlines the procedure for attaching the SEH to the network as a stackable or standalone device. Ensure that the network meets the guidelines and requirements outlined in Chapter 3, Installation Requirements and Specifications, before installing the SEH. NOTE A single phase grounded power receptacle that meets the power supply requirements listed in Chapter 3 must be located within seven feet of the installation.
Chapter 4: Installation The SEH may be installed on a tabletop or shelf, or in a 19-inch rack, and configured as a standalone or stacked hub. Go to Section 4.2 to install an SEH on a table or shelf. Go to Section 4.3 to install the SEH in a rack. 4.2 TABLETOP OR SHELF INSTALLATION This section provides guidelines for installation on a tabletop or shelf.
Rackmount Installation 4.3 RACKMOUNT INSTALLATION To install the SEH in a 19-inch rack, Cabletron Systems provides an accessory kit with the SEH that includes rack mounting brackets, mounting screws, and a strain-relief bracket for cable management. Rack mounting the SEH involves the following: • Attaching the strain-relief bracket • Rack mounting the SEH • Stacking the SEH when applicable Attaching the Strain-Relief Bracket Attach the strain-relief bracket to the front of the SEH as follows: 1.
Chapter 4: Installation Rack Mounting the SEH Refer to Figure 4-3 and proceed as follows to install the SEH into a 19-inch rack. 1. Remove the four cover screws (two from each side) located along the front edges of each side of the SEH. Do not remove the cover from the SEH. Do not remove any other screws from the unit. 2. Using the four 6-32 x 3/8-inch replacement flathead cover screws provided in the rackmount kit, attach the rack mounting brackets to each side of the SEH.
Powering Up and Stacking the SEH 19-Inch Rack EPIM 2 HubSTACK 100BASE-TX HUB WITH LANVIEW® SEH100TX-22 RCV LNK E 22 21 20 19 18 17 16 15 14 13 12 2 PWR MGMT CLN RCV LNK 11 10 9 8 7 6 5 4 3 2 1 22X 21X 20X 19X 18X 17X 16X 15X 14X 11X 10X 9X 8X 7X 5X 4X 3X 13X 12X E 1 6X 2X 1X EPIM 1 Screws (4) 1510_06 Figure 4-4 Installing the SEH in the Rack Proceed to Section 4.4, Powering Up and Stacking the SEH. 4.
Chapter 4: Installation 4.4.1 Stacking SEH Hubs with an SEHI Follow the procedures in this section if you are using an SEHI to manage an SEH stack: NOTE The SEH and the SEHI have universal power supplies that allow connection to power sources from 100 Vac to 125 Vac @ 4.0 A or 200 Vac to 250 Vac @ 2.0 A, 50/60 Hz. 1. Power up the SEHI by plugging the power cord into the back panel of the SEHI and plugging the other end into a grounded receptacle. Locate the SEHI at the bottom of the stack.
Powering Up and Stacking the SEH 5. Attach the interconnect cable to the “IN” port on the rear panel of the SEH as shown in Figure 4-5.
Chapter 4: Installation 4.4.2 Stacking Unmanaged SEH Hubs Together Use the following procedure to stack non-intelligent hubs (SEHs) together. NOTE The SEH has a universal power supply that allows connection to power sources from 100 Vac to 125 Vac @ 4.0 A or 200 Vac to 250 Vac @ 2.0 A, 50/60 Hz. 1. Power up each SEH in the stack by plugging the power cord into the back panel of the SEH and plugging the other end into a grounded receptacle. 2.
Installing an EPIM To install an EPIM-100TX, EPIM-100FX, or EPIM-100FMB, proceed as follows: ! When removing an EPIM, pull the module straight out to prevent damage to the connector. CAUTION 1. Remove the coverplate or the existing EPIM (whichever applies). 2. Slide the new EPIM into place, making sure that the connectors on the rear of the EPIM align correctly and firmly with the connector inside the SEH. Refer to Figure 4-6. 3. Tighten the mounting screw.
Chapter 4: Installation 4-10 SEH100TX User’s Guide
CHAPTER 5 CONNECTING TO THE NETWORK This chapter outlines the procedure for connecting the SEH to a network. Ensure that the network meets the guidelines and requirements outlined in Chapter 3, Installation Requirements and Specifications, before installing the SEH100TX-22. 5.1 CONNECTING THE SEH100TX-22 TO THE NETWORK The procedure for connecting network segments to the SEH varies depending on the media and ports being connected.
Chapter 5: Connecting to the Network EPIM 2 16X 15X X 14X 13 12X 2X 1X LNK EPIM 5X 4X 3X -100T X EPIM 1 1511_10 Figure 5-1 SEH Network Ports 3. Check that the applicable LNK LED for the port is on. If the LED is off, perform each of the following steps until it is on: a. Check that the 100BASE-TX device at the other end of the twisted pair segment is powered up. b. Verify that the RJ45 connector on the twisted pair segment has the proper pinouts. c. Check the cable for continuity. d.
Connecting the SEH100TX-22 to the Network The EPIM-100TX is also used to provide another RJ45 port to connect to a UTP segment. Before connecting a segment to the EPIM-100TX, check each end of the segment to determine if the wires have been crossed over for the proper connection. If the wires do not cross over, use the switch on the EPIM-100TX to internally cross over the RJ45 port. Refer to Figure 5-2 to set the EPIM-100TX crossover switch. Position X (crossed over) 1. RX+ 2. RX3. TX+ 4. NC 5. NC 6.
Chapter 5: Connecting to the Network c. Check the cable for continuity. d. Check that the twisted pair connection meets the cable specifications outlined in Section 3.1.2. e. Check that the crossover switch is in the correct position. If a link is not established, contact Cabletron Systems Technical Support. 5.1.3 nnecting an EPIM-100FX or EPIM-100FMB The EPIM-100FX and EPIM-100FMB have an SC style network port (see Figure 5-3).
Testing the Installation EPIM 2 16X 15X X 14X 13 12X 2X 1X LNK 00FX EPIM-1 5X 4X 3X EPIM 1 1510_10 Figure 5-3 EPIM-100FX Port 4. Check that the EPIM-100FX or EPIM-100FMB LNK LED is on. If the LED is off, perform the following steps until it is on: a. Check that the device at the other end of the link is powered up. b.
Chapter 5: Connecting to the Network 5-6 SEH100TX User’s Guide
CHAPTER 6 TROUBLESHOOTING This chapter contains instructions for using LANVIEW LEDs to troubleshoot physical layer network problems. 6.1 INSTALLATION TEST After connecting the SEH to the network, verify that packets pass between all Ethernet devices connected to the SEH and any other devices connected to the network. If there is a problem with any of the attached devices, check the link as follows: 1. Check that the LNK LED, if applicable, for the port is on.
Chapter 6: Troubleshooting 2. If the remote station is ready and the LNK LED is on, but no data passes through the port, one of the following conditions may exist: a. Network management has disabled the port. Correct this condition by enabling the port through network management. b. The port is segmented either because the collision detector was on for more than 110 µs or the SEH detected more than 32 consecutive collisions on the attached segment.
Using LANVIEW HubSTACK 100BASE-TX HUB WITH LANVIEW® SEH100TX-22 RCV LNK PWR MGMT CLN RCV LNK E 22 21 20 19 18 17 16 15 14 13 12 2 E 11 10 9 8 7 6 5 4 3 2 1 1 22X 11X LED NAME LED COLOR DEFINITION PWR (Power) Off No power Green (Solid) Power Green (Flashing) SEH managed by an intelligent hub Off SEH not managed Red (Flashing) Collision Off No collision Yellow (Flashing) SEHI is receiving data Off No activity Green Link established Off No Link MGMT (Management) CLN (Collision)
Chapter 6: Troubleshooting MGMT This LED flashes when an intelligent hub is managing the SEH. If this LED is not flashing, an intelligent hub is not managing the SEH. If an intelligent hub is attached to the SEH and the LED is not flashing, inspect the HubSTACK interconnect cables for proper connection. CLN When this red LED flashes, it indicates that a collision has occurred on one of the ports.
EPIM Specifications APPENDIX A EPIM INFORMATION A.1 EPIM SPECIFICATIONS EPIMs enable the connection of the SEH to the network using different media types.The SEHI100TX-22 supports the EPIM-100TX, EPIM-100FX, and the EPIM-100FMB. This appendix provides the specifications for each EPIM. A.1.1 EPIM-100TX The EPIM-100TX is an RJ45 connector supporting Unshielded Twisted Pair (UTP) cabling. The slide switch on the EPIM-100TX determines the crossover status of the cable pairs.
Appendix A: EPIM Information A.1.2 EPIM-100FX The EPIM-100FX shown in Figure A-2 supports Multimode Fiber Optic cabling. The EPIM-100FX is equipped with an SC style connector. Specifications for the EPIM-100FX are listed in Table A-1. EPIM 2 16X 15X 14X 13X 12X LNK 0FX EPIM-10 5X 4X 3X 2X 1X EPIM 1 1510_10 Figure A-2 Table A-1 EPIM-100FX Transmitter Power (EPIM-100FX) Cable Type Worst Case Budget Typical Budget 50/125 µm fiber optic 6.0 dB 9.0 dB 62.5/125 µm fiber optic 9.
EPIM Specifications A.1.3 EPIM-100FMB The EPIM-100FMB shown in Figure A-3 supports multimode fiber optic cabling and has an SC style connector. 16X 15X 4X 5X 14X 3X 13X 12X LNK 2X 1X 0FMB EPIM-10 EPIM 1 1511_20 Figure A-3 EPIM-100FMB The EPIM-100FMB acts as a non-filtering bridge. Its purpose is to extend the Broadcast Domain of a shared access 100BASE-T LAN, so that a full length of fiber optic cable can be used to reach the next domain or more typically to a switch port.
Appendix A: EPIM Information Table A-2 provides the specifications for the EPIM-100FMB. Table A-2 Transmitter Power (EPIM-100FMB) Cable Type Worst Case Budget Typical Budget 50/125 µm fiber optic 6.0 dB 9.0 dB 62.5/125 µm fiber optic 9.0 dB 12.0 dB 100/140 µm fiber optic 15.0 dB 18.0 dB The transmitter power levels and receive sensitivity levels listed are peak power levels after optical overshoot.
INDEX Numerics H 100BASE-TX cable length 3-2 crosstalk 3-2 impedance 3-2 jitter 3-2 noise 3-2 temperature 3-3 Help related manuals 1-4 HubSTACK cable requirements 3-1 A Agency approvals emission 3-6 immunity 3-7 safety 3-6 C Cable interconnecting SEHs 3-1 lengths 3-4 Cable specifications multimode fiber optic 3-3 overview of 3-1 UTP 3-2 I Immunity 3-7 Installation 5-5, 6-1 EPIMs 4-8 rackmount 4-3 stacking 4-5 strain-relief bracket 4-3 tabletop or shelf 4-2 testing 6-1 unpacking 4-1 Interconnecting SEH
Index S Safety, agency approval 3-6 SEH features 2-2 SEH100TX-22 connection of 5-1 Size dimensions 3-7 Specifications environmental requirements 3-6 power supply requirements 3-6 SEH network ports 3-5 T Testing 5-5 Troubleshooting 6-1 U UTP specification of 3-1 UTP segments connection of 5-1 Index-2 SEH100TX User’s Guide
POWER SUPPLY CORD The mains cord used with this equipment must be a 2 conductor plus ground type with minimum 0.75 mm square conductors and must incorporate a standard IEC appliance coupler on one end and a mains plug on the other end which is suitable for the use and application of the product and that is approved for use in the country of application. GERMAN: Die Netzleitung, die mit diesem Geraet benuetzt wird, soll einen zwei Leiter mit Erdleiter haben, wobei die Leiter mindestens 0.
