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SEH-22 AND SEH-24 10BASE-T STACKABLE HUB USER’S GUIDE CABLETRON SYSTEMS, P. O. Box 5005, Rochester, NH 03866-5005 SEH Book Page 1 Tuesday, March 19, 1996 4:12 PM.
SEH USER’S GUIDE i 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 ii SEH USER’S GUIDE 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 SEH USER’S GUIDE iii CABLETRON SYSTEMS, INC. PROGRAM LICENSE AGREEMENT IMPORTANT: Before utilizing this product, carefully read this License Agreement.
NOTICE iv SEH USER’S GUIDE 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).
SEH USER’S GUIDE v T ABLE OF CONTENTS CHAPTER 1 INTRODUCTION 1.1 USING THIS MANUAL ............................................................................ 1-1 1.2 GETTING HELP ....................................................................
CONTENTS vi SEH USER’S GUIDE CHAPTER 5 TROUBLESHOOTING 5.1 INSTALLATION CHECK-OUT ................................................................. 5-1 5.2 USING LANVIEW ...............................................................................
SEH USER’S GUIDE 1-1 CHAPTER 1 INTRODUCTION W elcome to the Cabletron Systems SEH-22 and SEH-24 10BASE-T Stackable Hubs User’s Guide . This manual pro vides installation instructions and reference information for the SEH-22 and SEH-24.
CHAPTER 1: INTRODUCTION 1-2 SEH USER’S GUIDE 1.2 GETTING HELP If you need additional support related to the Cabletron Systems SEH, or if you hav e any questions, comments, or suggestions concerning this manual, contact Cabletron Systems T echnical Support: By phone .
SEH FEATURES SEH USER’S GUIDE 1-3 Stack up to five SEH hubs using Cabletron Systems e xternal HubST A CK Interconnect cables. Manage the stack by using the Cabletron Systems MicroMMA C or SEHI (Stackable Ethernet Hub with Intelligence). Up to four SEH hubs can be stacked with one intelligent hub .
CHAPTER 1: INTRODUCTION 1-4 SEH USER’S GUIDE 1.5 STACKABLE CAPABILITIES The SEH is a non-intelligent hub designed to be managed by a Cabletron Systems intelligent hub such as the SEHI or the MicroMMA C. Intelligent hubs serve as the logical “top” of the stack.
OPTIONAL FEATURES SEH USER’S GUIDE 1-5 T able 1-2 lists the board revision requirements for EPIMs used in the SEH-24. The board re vision number is located on the EPIM’ s printed circuit board directly after the part number as sho wn in Figure 1-2.
CHAPTER 1: INTRODUCTION 1-6 SEH USER’S GUIDE HubSTACK Interconnect Cables Use Cabletron HubST A CK Interconnect cables to stack hubs together . T able 1-3 lists the part number and application for each cable. Rack Mount Capabilities The SEH can be installed in a 19-inch rack.
SEH USER’S GUIDE 2-1 CHAPTER 2 INST ALLA TION REQUIREMENTS/SPECIFICA TIONS This chapter describes network guidelines, po wer requirements, and operating specifications for the SEH.
CHAPTER 2: INSTALLATION REQUIREMENTS/SPECIFICATIONS 2-2 SEH USER’S GUIDE 2.1.2 10B ASE-T UTP and STP Cable Specifications The de vices and 10B ASE-T T wisted Pair Segments connected to the SEH 10B ASE-T T wisted Pair Netw ork Ports and EPIM-T module must meet the IEEE 802.
CABLE SPECIFICATIONS SEH USER’S GUIDE 2-3 Delay The maximum propagation delay of a 10B ASE-T link segment must not exceed 1000 ns. This 1000 ns maximum delay limits the maximum link segment length to no greater than 200 meters.
CHAPTER 2: INSTALLATION REQUIREMENTS/SPECIFICATIONS 2-4 SEH USER’S GUIDE 2.2 NETWORK PORT SPECIFICATIONS The SEH-22 and SEH-24 network ports use shielded RJ45 connectors that support both STP and UTP cabling. Figure 2-1 sho ws the RJ45 pinouts. Figure 2-1.
OPERATING SPECIFICATIONS SEH USER’S GUIDE 2-5 2.4 OPERATING SPECIFICATIONS This section describes the operating specifications for the SEH. Cabletron Systems reserves the right to change these specifications at an y time without notice. General Delay Times (Start of Packets): Twisted Pair to EPIM- A 1.
CHAPTER 2: INSTALLATION REQUIREMENTS/SPECIFICATIONS 2-6 SEH USER’S GUIDE Fault Protection: Each segment disconnects itself from the other segments if 32 consecutive collisions occur, or if the collision detector of a segment is on for longer than approximately 110 µ s.
OPERATING SPECIFICATIONS SEH USER’S GUIDE 2-7 Safety This unit meets the safety requirements of UL1950 (without D3 de viations), CSA C22.2 No. 950, and EN60950. EMI This unit meets the EMI requirements of FCC Part 15 Class A, EN55022 Class A and VCCI Class I.
SEH USER’S GUIDE 3-1 CHAPTER 3 INST ALLA TION This chapter outlines the procedure for attaching the SEH to a network as either a stackable or standalone de vice. Ensure that the network meets the guidelines and requirements outlined in Chapter 2, Installation Requirements/Specifications , before installing the SEH.
CHAPTER 3: INSTALLATION 3-2 SEH USER’S GUIDE 3.2.1 T abletop or Shelf Installation The follo wing subsection provides guidelines for installation on a tabletop or shelf.
INSTALLING THE SEH SEH USER’S GUIDE 3-3 If the installation requires that the SEH be stacked, proceed to Section 3.2.5. Otherwise, continue by po wering-up the SEH as described in Section 3.
CHAPTER 3: INSTALLATION 3-4 SEH USER’S GUIDE Figure 3-2. SEH Rack Mounting Hardware 3.2.3 Attaching the Strain Relief Brac ket Attach the strain relief bracket to the front of the SEH as follo ws: 1. Locate the strain relief bracket and four 8-32 x 3/8" screws from the accessory kit (see Figure 3-2).
INSTALLING THE SEH SEH USER’S GUIDE 3-5 3.2.4 Rack Mounting the SEH Refer to Figure 3-4 and perform these steps to install the SEH in a 19-inch rack. 1. Locate the four 8-32 x 1/4" screws and the two rackmount brackets in the accessory kit (see Figure 3-2).
CHAPTER 3: INSTALLATION 3-6 SEH USER’S GUIDE Figure 3-5. Installing the SEH in the Rack If the installation requires that the SEH is to be stacked, proceed to Section 3.
INSTALLING THE SEH SEH USER’S GUIDE 3-7 T o stack SEHs, refer to Figure 3-6 and perform the following steps: 1. Attach one end of the SEH HubSTACK Interconnect cable to the bus port labeled “OUT” on the rear panel of the SEH.
CHAPTER 3: INSTALLATION 3-8 SEH USER’S GUIDE If one end of a HubST A CK Interconnect cable is disconnected without disconnecting the other end attached to the hub, ensure that you disconnect the cable from the “OUT” port as sho wn in Figure 3-7.
CONNECTING THE SEH TO THE POWER SOURCE SEH USER’S GUIDE 3-9 3.3 CONNECTING THE SEH TO THE POWER SOURCE Connect the SEH to the po wer source as follows: 1. Plug the power cord into the back panel of the SEH. 2. Plug the other end of the power cord into a grounded wall outlet.
CHAPTER 3: INSTALLATION 3-10 SEH USER’S GUIDE 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 3-8. 3. Install the mounting screw.
SEH USER’S GUIDE 4-1 CHAPTER 4 CONNECTING T O 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 2, Installation Requirements/Specifications , before installing the SEH.
CHAPTER 4: CONNECTING TO THE NETWORK 4-2 SEH USER’S GUIDE Connect twisted pair segments to the SEH as follo ws: 1. Insert the RJ45 connector from each twisted pair segment into the desired network port on the SEH. See Figure 4-1. Figure 4-1. SEH-24 Network Ports 2.
CONNECTING THE SEH TO THE NETWORK SEH USER’S GUIDE 4-3 4.1.2 Connecting a UTP Segment to an EPIM-T Before connecting a segment to the EPIM-T , check each end of the segment to determine if the wires are crossed o ver for the proper connection. If the wires do not cross ov er , use the switch on the EPIM-T to internally cross ov er the RJ45 port.
CHAPTER 4: CONNECTING TO THE NETWORK 4-4 SEH USER’S GUIDE c. Check the cable for continuity. d. Check that the twisted pair connection meets dB loss and cable specifications outlined in Chapter 2. e. Check that the crossover switch is in the correct position.
CONNECTING THE SEH TO THE NETWORK SEH USER’S GUIDE 4-5 Caution : Do not touch the ends of the fiber optic strands, and do not let the ends come in contact with dust, dirt, or other contaminants. Contamination of the ends causes problems in data transmissions.
CHAPTER 4: CONNECTING TO THE NETWORK 4-6 SEH USER’S GUIDE Figure 4-3. The EPIM-F1, EPIM-F2 and EPIM-F3 4.1.4 Connecting a Thin-Net Segment to an EPIM-C T o connect a thin-net segment to an EPIM-C, refer to Figure 4-4 and perform the follo wing steps: 1.
CONNECTING THE SEH TO THE NETWORK SEH USER’S GUIDE 4-7 3. If the Internal Termination switch is in the OFF position: a. Attach a BNC tee-connector to the BNC port on the module. b. Attach the thin-net segment to one of the female connectors on the tee-connector.
CHAPTER 4: CONNECTING TO THE NETWORK 4-8 SEH USER’S GUIDE 4.1.5 Connecting an A UI Cab le to an EPIM-A Connect an EPIM-A to an external netw ork segment as follo ws: 1. Attach an external transceiver to the network segment that will be connected to the AUI port.
CONNECTING THE SEH TO THE NETWORK SEH USER’S GUIDE 4-9 5. Check that the PWR LED on the EPIM-A is on. If the LED is off, contact Cabletron Systems Technical Support. 6. If the PWR LED is on with the AUI cable disconnected, continue with the following checks: a.
CHAPTER 4: CONNECTING TO THE NETWORK 4-10 SEH USER’S GUIDE 2. Attach one end of an AUI cable, no longer than 50 meters in length, to the port on the EPIM-X (Figure 4-6) and the other end to the intended node. Figure 4-6. The EPIM-X 4.2 FINISHING THE INSTALLATION The SEH is no w ready for operation.
SEH USER’S GUIDE 5-1 CHAPTER 5 TROUBLESHOO TING This chapter contains instructions for using LANVIEW LEDs to troubleshoot physical layer network problems.
CHAPTER 5: TROUBLESHOOTING 5-2 SEH USER’S GUIDE 2. If the remote station is ready and the LNK LED is on, but no data passes through the port, one of two conditions may exist: • Network management has disabled the port.
USING LANVIEW SEH USER’S GUIDE 5-3 Figure 5-1. LANVIEW LEDs PWR (Green) When this LED is on, the SEH is recei ving power . If this LED is of f, it indicates a loss of input po wer . Check the po wer source (circuit breaker , fuse, etc.). If the proper source po wer is present, the problem could be with the SEH.
CHAPTER 5: TROUBLESHOOTING 5-4 SEH USER’S GUIDE MGMT (Green Flashing) This LED flashes when an intelligent hub manages the SEH. If this LED does not flash, an intelligent hub is not managing the SEH. If an intelligent hub is connected to the SEH and the LED does not flash, inspect the HubST A CK Interconnect cables for proper connections.
SEH USER’S GUIDE A-1 APPENDIX A EPIM INFORMA TION A.1 EPIM SPECIFICATIONS EPIMs enable the connection of the SEH to the main network using dif ferent media types. Cabletron Systems offers a v ariety of EPIMs. The follo wing sections explain specifications for each EPIM.
APPENDIX A: EPIM INFORMATION A-2 SEH USER’S GUIDE A.1.2 EPIM-F1 and EPIM-F2 The EPIM-F1 and EPIM-F2 sho wn in Figure A-2 support Multimode Fiber Optic cabling. Each EPIM has an internal Cabletron Systems FOT-F Fiber Optic Transceiver . The EPIM-F1 is equipped with SMA Connectors and the EPIM-F2 is equipped with ST Connectors.
EPIM SPECIFICATIONS SEH USER’S GUIDE A-3 A.1.3 EPIM-F3 The EPIM-F3 sho wn in Figure A-3 supports Single Mode Fiber Optic cabling. It has an internal Cabletron Systems FOT-F Fiber Optic Transceiver and is equipped with ST Connectors. Specif ications for the EPIM-F3 are listed on the follo wing page.
APPENDIX A: EPIM INFORMATION A-4 SEH USER’S GUIDE Note : The transmitter power levels given above are Peak Power Levels after optical overshoot. You must use a Peak Power Meter to correctly compare the values given above to those measured on any particular port.
EPIM SPECIFICATIONS SEH USER’S GUIDE A-5 A.1.4 EPIM-C The EPIM-C supports thin-net coaxial cabling and is equipped with an internal Cabletron Systems TMS-3 Transceiver . Use the TERM switch on the front of the EPIM-C to set the internal 50 ohm terminator .
APPENDIX A: EPIM INFORMATION A-6 SEH USER’S GUIDE A.1.5 EPIM-A and EPIM-X (A UI P or t) The EPIM-A is a DB15 female connector used to attach segments to an external transcei ver . The EPIM-X is equipped with dual internal transcei vers. It has a DB15 male connector used to attach segments to an A UI cable.
EPIM CABLE SPECIFICATIONS SEH USER’S GUIDE A-7 A.2 EPIM CABLE SPECIFICATIONS The follo wing subsections provide cable specifications for the v arious EPIMs use in the SEH. A.2.1 Multimode Fiber Optic Cable Specifications T able A-1 sho ws Multimode Fiber Optic Cable specifications for the EPIM-F1 and EPIM-F2 modules.
APPENDIX A: EPIM INFORMATION A-8 SEH USER’S GUIDE A.2.2 Single Mode Fiber Optic Cable Specifications T able A-2 sho ws Single Mode Fiber Optic Cable specifications for the EPIM-F3. Attenuation T est the fiber optic cable with a fiber optic attenuation test set adjusted for an 1300 nm wa velength.
EPIM CABLE SPECIFICATIONS SEH USER’S GUIDE A-9 A.2.3 Thin-Net Network Requirements f or the EPIM-C When you connect a thin-net segment to the SEH (via an EPIM-C), your network must meet the follo wing requirements: Cable Type Use 50 ohm RG-58A/U coaxial cable to make up a thin-net se gment.
APPENDIX A: EPIM INFORMATION A-10 SEH USER’S GUIDE A.2.4 A UI Cab le Requirements for the EPIM-A and EPIM-X T o connect an external network segment to the SEH (via an EPIM-A or EPIM-X), the A UI cable must meet the follo wing requirements: AUI Cable The cable between the module and de vice must be IEEE 802.
SEH USER’S GUIDE Index-1 C Cable Specifications 2-1 UTP and STP 2-2 Connecting to the Network 4-1 D Daughter Board 1-6 Daughter Board Upgrade Kit 1-6 E EMC Requirements 2-7 EMI Requirements 2-7 EPIM.
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.
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