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SEH Book Page 1 Tuesday, March 19, 1996 4:12 PM
SEH-22 AND SEH-24 10BASE-T
STACKABLE HUB
USER’S GUIDE
CABLETRON SYSTEMS, P. O. Box 5005, Rochester, NH 03866-5005
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SEH Book Page ii Tuesday, March 19, 1996 4:12 PM 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.
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SEH Book Page iv Tuesday, March 19, 1996 4:12 PM 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). CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO YOU BY CABLETRON IN WRITING, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF M
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SEH Book Page vi Tuesday, March 19, 1996 4:12 PM CONTENTS CHAPTER 5 TROUBLESHOOTING 5.1 INSTALLATION CHECK-OUT.................................................................5-1 5.2 USING LANVIEW ....................................................................................5-2 APPENDIX A EPIM INFORMATION A.1 EPIM SPECIFICATIONS ........................................................................ A-1 A.1.1 EPIM-T ............................................................
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SEH Book Page 5 Tuesday, March 19, 1996 4:12 PM OPTIONAL FEATURES Table 1-2 lists the board revision requirements for EPIMs used in the SEH-24. The board revision number is located on the EPIM’s printed circuit board directly after the part number as shown in Figure 1-2. Table 1-2. EPIM Board Revision Requirements EPIM EPIM BOARD REVISION EPIM-A Not Applicable EPIM-C 05 or greater EPIM-T 04 or greater EPIM-X 02 or greater EPIM-F1 05 or greater EPIM-F2 05 or greater EPIM-F3 02 or gr
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SEH Book Page 6 Tuesday, March 19, 1996 4:12 PM CHAPTER 1: INTRODUCTION HubSTACK Interconnect Cables Use Cabletron HubSTACK Interconnect cables to stack hubs together. Table 1-3 lists the part number and application for each cable. Table 1-3. HubSTACK Interconnect Cables P/N Description Application 9380110 12" HubSTACK SEH to SEH connections. Interconnect Cable 9380111 18" HubSTACK SEHI or MicroMMAC to SEH Interconnect Cable connections. Rack Mount Capabilities The SEH c
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SEH Book Page 1 Tuesday, March 19, 1996 4:12 PM CHAPTER 2 INSTALLATION REQUIREMENTS/SPECIFICATIONS This chapter describes network guidelines, power requirements, and operating specifications for the SEH. Be sure to read this chapter before you install the SEH. 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. 2.1 CABLE
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SEH Book Page 2 Tuesday, March 19, 1996 4:12 PM CHAPTER 2: INSTALLATION REQUIREMENTS/SPECIFICATIONS 2.1.2 10BASE-T UTP and STP Cable Specifications The devices and 10BASE-T Twisted Pair Segments connected to the SEH 10BASE-T Twisted Pair Network Ports and EPIM-T module must meet the IEEE 802.3 10BASE-T specifications shown below. Length The IEEE 802.3 10BASE-T standard requires that 10BASE-T devices transmit over a 100 meter (328 foot) link using 22-24 AWG unshielded twiste
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SEH Book Page 4 Tuesday, March 19, 1996 4:12 PM CHAPTER 2: INSTALLATION REQUIREMENTS/SPECIFICATIONS 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 shows the RJ45 pinouts. 1 2 3 4 5 6 7 8 5X 3X 1X 1. Receive + 5. Not Used 2. Receive - 6. Transmit - 3. Transmit + 7. Not Used 4. Not Used 8. Not Used 1490_3 Figure 2-1. RJ45 Network Ports 2.3 TRANSCEIVER REQUIREMEN
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SEH Book Page 5 Tuesday, March 19, 1996 4:12 PM OPERATING SPECIFICATIONS 2.4 OPERATING SPECIFICATIONS This section describes the operating specifications for the SEH. Cabletron Systems reserves the right to change these specifications at any time without notice. General Delay Times (Start of Packets): Twisted Pair to EPIM- A 1.10 m s Twisted Pair to Twisted Pair 1.00 m s EPIM-A to Twisted Pair 1.00 m s Delay Times (JAM): Twisted Pair to EPIM-A 960 ns Preamble: Input: Minimum of 40 bits requir
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SEH Book Page 6 Tuesday, March 19, 1996 4:12 PM CHAPTER 2: INSTALLATION REQUIREMENTS/SPECIFICATIONS 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 m s. This fault protection resets automatically after one packet is transmitted or received onto the fault protected segment without causing a collision. Power Requirements The SEH uses a universa
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