KYLAND Technology KIEN5000 User Manual

KYLAND Technology KIEN5000 User Manual

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KIEN5000 Industrial Ethernet Switch
User's Manual
KYLAND Telecom Technology Co., Ltd.

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  • Page 1 KIEN5000 Industrial Ethernet Switch User’s Manual KYLAND Telecom Technology Co., Ltd.
  • Page 2 KIEN5000 Industrial Ethernet Switch User’s Manual Copyright © 2005 KYLAND Telecom Technology Co., Ltd. All rights reserved. No part of this documentation may be excerpted, reproduced, translated, annotated or duplicated, in any form or by any means without the prior written permission of KYLAND Corporation.
  • Page 3 EMC protection at power input side, and excellent EMC protection of RJ45 port allows KIEN5000 applicable in harsh and dangerous industrial environments. The redundant function of optical fiber network, independent entire network...
  • Page 4 Appendix A introduces twisted pair and pin distribution rules of KIEN5000 industrial Ethernet switch; Appendix B introduces cable types and specifications of KIEN5000 industrial Ethernet switch; Appendix C introduces abbreviations used in this manful. Statement: as product and technology upgrades and improves constantly, the contents of this document may not completely accord with the actual product.
  • Page 5 Notice for Safety Operation This product offers reliable performances as long as it is used within the designed scope. Artificial damage or destruction of the equipment should be avoided. Carefully read this manual and well preserve this manual for future reference; Do not place the equipments near water sources or damp places;...
  • Page 6 Explanation of Warning Marks: This manual uses two kinds of noticeable warning signs to arouse special attention of users during operation. The implications of these signs are as follows: Warning: pay special attention to the notes behind the mark, improper operation will result in serious damage of the switch or injury of operation personnel.
  • Page 7: Table Of Contents

    Contents Chapter 1 System Overview ......................... 3 1.1 Product Overview ..........................3 1.2 Features............................... 3 1.3 Packing list and unpacking check....................... 4 Chapter 2 Performance Indexes ........................6 2.1 System indexes ............................ 6 2.2 Service Interface ..........................7 2.3 Service function ........................... 7 Chapter 3 Hardware Structure ........................
  • Page 8 6.2 System configuration ......................... 31 Appendix A Twisted-pair and Pin Distribution ..................32 Appendix B Cable Type and Specifications ................... 34 Appendix C Glossary ..........................35 -ii-...
  • Page 9: Chapter 1 System Overview

    EMC protection at power input side, and excellent EMC protection of RJ45 port allows KIEN5000 applicable in harsh and dangerous industrial environments. The redundant function of...
  • Page 10: Packing List And Unpacking Check

    Before opening the case, place it stably, pay attention to the direction of the packing case, and ensure its righ t side is facing upward, so as to prevent KIEN5000 from falling apart after opening the case. If a hard...
  • Page 11 After opening the case, check the amount of KIEN5000 equipments (including main unit of KIEN5000, parts of equipment, user’s manual, customer service guideline) according to the packing list, and check the appearance quality of KIEN5000.
  • Page 12: Chapter 2 Performance Indexes

    Chapter 2 Performance Indexes 2.1 System indexes The system performance indexes of KIEN5000 industrial Ethernet switch are shown in Table 2-1. Table 2-1 System Indexes System Indexes KIEN5000 4 ×10Base-T/100Base-TX Quantity of RJ45 port Quantity of uplink redundant 4 ×10Base-T/100Base-TX RJ45 port Supporting standard: IEEE802.3, IEEE 802.3x, IEEE 802.3u,...
  • Page 13: Service Interface

    2.3 Service function Configuration and Management At KIEN5000, the settings, queries and management can be realized for the whole switch or network system through CONSOLE interface, Telnet and Web browner. LED Indicator The LEDs indicate the port status correctly including transmission rate, link status and system status.
  • Page 14 IGMP means Internet Group Multicast Protocol. KIEN5000 supports IGMP and query. Setting for Working Mode of Port KIEN5000 is able to set the working mode of all ports through management: full/half duplex, auto-sensing, enforced full/half duplex, enforced 10M/100M etc. Broadcast Storm Control Broadcast storm is the ceaseless transfer of broadcast frame or multicast frame in bridge, which is caused by loop and will waste much bandwidth.
  • Page 15: Chapter 3 Hardware Structure

    3.2 Switch Structure 3.2.1 Case KIEN5000 case is a small DIN rail or wall mounting type structure. The entire unit has a six-side-enclosed structure, with protection class up to IP30. The case’s left and right side plates made of ribbed aluminum profile are a part of the heat dispersion system of the entire unit.
  • Page 16 Discarding the traditional form of axial fan heat dispersion reduces power consumption of the entire unit and increases the stability of the system. The figuration of KIEN5000 case is shown in Figure 3-2. Its contour dimension (excluding the dimensions of DIN rail and wall-mounting components) is 142 ㎜×55.4 ㎜×120.5 ㎜(height×width×...
  • Page 17: Front Panel

    3.2.2 Front panel The front panel of KIEN5000 industrial Ethernet switch has integrated four 10Base-T/100Base-TX RJ45 Ethernet ports and four system and port operation indicators. Its structure is shown in Figure 3-3:...
  • Page 18: Ethernet Rj45 Port

    LED indicator The indicators on the front panel of KIEN5000 can indicate system operation and port status, helping detect and eliminate faults. Table 3-1 describes the meanings of all indication lamps on the front panel.
  • Page 19: Top Panel

    No effective network connection has been established for the port. 3.2.3 Top panel The top panel of KIEN5000` industrial Ethernet has integrates two power input terminals for redundant power supply, alarming relay output terminal, RS232 management port, DIP switch for switch attribute setting etc.
  • Page 20 KIEN5000 from two independent sets of external DC power supply systems so that when either of the two sets of power supply systems fails, the equipment can operate uninterruptedly, thereby increasing the reliability of network operation. Three-wire terminal with interval of 3.81 ㎜...
  • Page 21 Users can the network management cable with end bearing RJ plug and another end DB9F plug to connect the network management interface of KIEN5000 with the 9-pin serial port of the control computer. Operating the local management software provided by KYLAND Telecom in the...
  • Page 22 1、2 port set as set as redundant mode local. 4、8 port set as redundant mode local 1、2 port set as redundant mode local DIP switch for property setting The DIP switch for setting of KIEN5000 has two positions, namely T -16-...
  • Page 23: Bottom Panel

    3.2.4 Bottom panel There is a threaded hole for grounding in the bottom panel of KIEN5000. M3 ×8 screw andФ3 cold pressed terminal for grounding free of charge will be delivered together with the main unit. As shown in Figure 3-8, crimp one end of grounding conductor to the cold pressed terminal and then use the grounding screw to fix it at the grounding hole of the shell;...
  • Page 24 -18-...
  • Page 25: Chapter 4 Hardware Mounting

    Chapter 4 Hardware Mounting 4.1 Mounting requirements KIEN5000 industrial Ethernet switch has a single body structure and can be directly mounted on standard 35 ㎜ DIN rail, or vertically mounted on the wall or inner wall of cabinet with wall-mounting components.
  • Page 26 KIEN5000 has already fitted with a green plastic connector socket for DIN rail. Rail mounting dimensions are shown in Figure 4-1. If it is necessary to mount KIEN5000 on DIN rail, check the mounting conditions of DIN rail before mounting, including the following two items: 1....
  • Page 27: Wall-Mounting

    Figure 4-2 Mounting KIEN5000 on DIN rail 4.2.2 Wall-mounting In some places, wall mounting may be more suitable than DIN rail mounting. KYLAND Telecom can provide the component (wall-mounting plate) for mounting KIEN5000 on wall. Wall-mounting dimensions are shown in Figure 4-3. -21-...
  • Page 28 Figure 4-3 KIEN5000 wall-mounting dimensions Attention: Wall-mounting plate is not included in standard configuration of KIEN5000. It should be ordered independently when ordering. Wall-mounting procedures for KIEN5000: 1. Use a cross screwdriver to unscrew the two screws fastening the DIN rail connector socket on KIEN5000 equipment, and remove the green DIN rail connector socket.
  • Page 29 countersunk head screws M3×6) for mounting wall-mounting plate from the packing box. Use a cross head screwdriver to mount the wall-mounting plate in the position originally for mounting DIN rail connector socket. The mounting direction of the wall-mounting plate is shown in Figure 4-4.
  • Page 30: Cable Connection

    M3 nuts on the back side). Do not screw down the screws thoroughly, reserve a distance of around 5 ㎜. 4. After fastening the screws on the wall, mount KIEN5000 in the selected position. Pass the four screws through the four Ф65 holes on the wall-mounting plate and slip KIEN5000 downwards, as shown in Figure 4-5.
  • Page 31: Cable Wiring

    2. Network management interface connection KIEN5000 is connected with the serial port of control computer via the CONSOLE port of the top panel. Users can make a network management line with proper length according to Figure 3-7. 3. Power connection Use 24V DC power supply for KIEN5000 equipment according to the indications on product label.
  • Page 32 9. There must be the relevant marks at both ends of cable and the information on the marks should be explicit to facilitate maintenance. -26-...
  • Page 33: Chapter 5 Testing Method

    5.2 Testing of Ethernet interface Power KIEN5000 as shown in Fig. 5-1, make any two Ethernet interfaces connect with the network port of the two testing computers by straight-through network cable, transmit Ping command mutually, both sides can correctly Ping to each other and no data package is lost.
  • Page 34: Testing Of Uplink Electrical Ports

    5.3 Testing of uplink electrical ports Let the equipment of KIEN5000 at both ends to form a fiber link network as shown in Fig. 5-2., connect any one Ethernet interface of each equipment to the testing computer by straight-through network cable, transmit Ping command mutually, both sides can correctly Ping to each other and no data package is lost.
  • Page 35: Chapter 6 Networking Mode And System Configuration

    The most typical network- forming mode of KIEN5000 is redundant ring network and redundant double ring netowrk. KIEN5000 can form a twisted-pair redundant ring network as shown in Figure 6-1, in which one end unit is set as local one, and the others as remote one.
  • Page 36 Figure 6-2 twisted-pair redundant double ring network composed by KIEN5000 Attention: When KIEN5000 is forming a redundant ring network, connection of electrical port 4 and 8 are recommended, namely, the electrical port 4 of one end equipment shall be connected with the electrical port 8 of the other end equipment. This is shown as the following figure.
  • Page 37: System Configuration

    6.2 System configuration KIEN5000 Industrial Ethernet Switch is an integrated structure, the 4 10Base-T/100Base-TX Ethernet RJ-45 ports and 4 uplink redundant 10Base-T/100Base-TX RJ45 interfaces are fixed configuration. The power supply voltage is DC 24V. The specific configuration and its corresponding models are shown as Table 6-1.
  • Page 38: Appendix A Twisted-Pair And Pin Distribution

    Appendix A Twisted-pair and Pin Distribution For the connection of 10Base-T/100Base-TX, the twisted-pair must have two pair cable. Each pair is distinguished with two different colors. For example, one strand is green, and the other is the alternate of green and white stripes. RJ-45 connector should be equipped at both ends of the cable.
  • Page 39 connected to pin 1, 2, 3 and 6 at the other end of the straight-through cable respectively. Cross-over cable should be used for switch or hub with MDI-X port. The pin distribution of 10Base-T/100Base-TX is listed in the table A-1. Table A-1 Pin distribution of 10Base-T/100Base-TX MDI-X signal name MDI signal name...
  • Page 40: Appendix B Cable Type And Specifications

    Appendix B Cable Type and Specifications The cable type and specifications are shown as table B-1: Table B-1 Cable type and specifications Cable Type Max. length Connector 100m(328 foot ) 10Base-T Cat.3, 4 and 5 100 ohm UTP RJ-45 100m(328 foot ) 100Base-TX Cat.5 –100 ohm UTP RJ-45...
  • Page 41: Appendix C Glossary

    Appendix C Glossary Terminology Explanation Twisted-pair standard of Cat3, Cat4 and Cat5 in IEEE specification for 10Base-T 10Mbps Ethernet Twisted-pair standard of Cat5 or above in IEEE specification for 100Base-TX 100Mbps Fast Ethernet A characteristic that is automatically configured to adaptive mode for the Adaptive speed, duplex and traffic control port.
  • Page 42 Publisher: Beijing KYLAND Telecom Technology CO., LTD Address: 5/F, Office Building, Transport Center, East of Xisanqi Bridge Haidian District, Beijing, China Website: http://www.kyland.com.cn Postcode: 100096 Tel: (+86 10)82900770 Fax: (+86 10)82900780 E-mail:marketing @ kyland. com. cn -36-...
  • Page 43 KIEN6000 Industrial Ethernet Switch User’s Manual Beijing KYLAND Technology Co., Ltd.
  • Page 44 This document contains proprietary information, which is protected by copyright. All rights are reserved. No part of this document may be photocopied, reproduced, or translated to another language without the prior consent of Beijing Kyland Technology Co., Ltd. Publisher: KYLAND Technology Co., Ltd.
  • Page 45 Preface KIEN6000 are high-performance industrial Ethernet switches designed and developed by KYLAND for industrial applications. KIEN6000 may operate in harsh industrial environments because they employ high-performance switch engines, solid, fanless and ribbed case with efficient heat dissipation surface, protections against overcurrent and overvoltage of power input, EMC protections, and excellent protection performance of RJ45 ports.
  • Page 46: Safety Notices

    Safety Notices These products have good and reliable performance in designed use range. But man-made damages to the switch shall be avoided. Read this Manual thoroughly and keep it well for future reference.  Do not place the switch at where is close to water source or dampness. ...
  • Page 47 Table of Contents Chapter 1 Product Overview 1.1 Product Overview 1.2 Features 1.3 Package Checklist Chapter 2 Specifications & Service Functions 2.1 System Specifications 2.2 Port Specifications 2.3 Service function Chapter 3 Hardware Structure 3.1 System structure 3.2 Switch Structure 3.2.1 Casing 3.2.2 Front panel 3.2.3 Top panel...
  • Page 48 6.1 Networking mode 6.2 System configuration Appendix A Twisted-pair and Pin Distribution Appendix B Cable Type and Specifications Appendix C Glossary -iii-...
  • Page 49: Chapter 1 Product Overview

    Chapter 1 Product Overview 1.1 Product Overview KIEN6000 is high-performance industrial Ethernet switches designed and developed by KYLAND for industrial applications. KIEN6000 may operate in harsh industrial environments because they employ high-performance switch engines, solid, fanless and ribbed case with efficient heat dissipation surface, protections against overcurrent and overvoltage of power input, EMC protections, and excellent protection performance of RJ45 ports.
  • Page 50: Package Checklist

    Kyland Technology Powerful Management Function It can be managed in web browser by entering IP address. It can be logged in by telnet or hyper terminal. Port aggravation, port mirroring, VLAN, port priority and IGMP can be configured in the management.
  • Page 51 Kyland Technology 2. Unpacking check Before opening the carton, place it stably, pay attention to the direction of the packing carton, and ensure its t side is facing upward, so as to prevent KIEN6000 from falling apart after righ opening the case. If a hard object is used to unclench the case, do not overly extend the hard object into the carton to avoid damage of the equipments inside.
  • Page 52: Chapter 2 Specifications & Service Functions

    Kyland Technology Chapter 2 Specifications & Service Functions 2.1 System Specifications The system specifications of KIEN6000 industrial Ethernet switch are shown in Table 2-1. Table 2-1 System specifications System Indexes KIEN6000 4 10Base-T/100Base-TX RJ45 port 2 10Base-T/100Base-TX Redundant RJ45 port...
  • Page 53: Port Specifications

    Kyland Technology Physical dimensions (heightwidthdepth): 142mm55.4mm120.5mm(excluding the dimensions of DIN rail and wall-mounting components) Mounting mode: DIN rail or wall-mounting Heat removal method: Ribbed aluminum casing heat Mechanical parameter dissipation without fan. Outlet type: front outlet for service, top outlet for power supply...
  • Page 54: Port Mirroring

    Kyland Technology system through CONSOLE interface, Telnet and Web browner. LED Indicator The LEDs indicate the port status correctly including transmission rate, link status and system status. VLAN The network can be divided into several VLANs according to ports, through which the users in one VLAN can communicate each other.
  • Page 55 Kyland Technology KIEN6000 supports for STP (Spanning Tree), STP enable the switch to make sure of the dual paths and don’t cause loop. It only enables the shortest path and block other path to avoid loop. Broadcast Storm Control Broadcast storm is the ceaseless transfer of broadcast frame or multicast frame in bridge, which is caused by loop and will waste much bandwidth.
  • Page 56: Chapter 3 Hardware Structure

    Kyland Technology Chapter 3 Hardware Structure 3.1 System structure The hardware structure of KIEN6000 is shown in Figure 3-1. Switch Network Controller POWER Fiber TP Port TP Port 3, 5, 6, 7 Port 4, 8 1, 2 Power Input Figure 3-1 Hardware structure The system hardware mainly consists of: 1....
  • Page 57 Discarding the traditional form of fan for heat dispersion reduces power consumption of the entire unit and increases the stability of the system. The figuration of KIEN5000 case is shown in Figure 3-2. Dimensions: 142mm55.4mm120.5mm (height×width×thickness)
  • Page 58: Front Panel

    Kyland Technology Warning: The case is a part of the heat dissipation system, do not touch the case when the switch operates to avoid heat burn.. 3.2.2 Front panel In the front panel of KIEN6000, there are 2 uplink (redundant) 10Base-T/100Base-TX RJ45 ports, 4 10Base-T/100Base-TX RJ45 ports and 2 pair of uplink (redundant) fiber ports, and LED indicators.
  • Page 59 Kyland Technology the transmitting end TX of the same remote switch. The two pairs of uplink redundant 100Base-FX fiber ports can form the optical fiber redundant ring network. In case of system failures, the redundant recovery time of the ring network is less than 100ms, which increases reliability of network running effectively.
  • Page 60: Top Panel

    Kyland Technology Power State Power is being supplied to power input POWER1 POWER1 Power is not being supplied to power input POWER1 Power is being supplied to power input POWER2 POWER2 Power is not being supplied to power input POWER2...
  • Page 61 Kyland Technology Power input terminal KIEN6000 has redundant power input function. P1 and P2 are two power input terminals. Any one of them can be used independently. Or, they can be connected with two sets of external independent DC power systems. In case of failure, the switch is able to run normally, improving network reliability.
  • Page 62 Kyland Technology Figure 3-6 the alarm lamp and relay output RS232 console interface The RS232 console interface of KIEN6000 is a shielded RJ45 connector based on 3-line RS232. The user can connect the interface with the 9-pin serial port of computer by a cable, of which one end is RJ45 and the other end is DB9F plug.
  • Page 63 Kyland Technology DIP switch The switch has two positions that are defined T and F respectively, which are used to set port 4, 8 and 1, 2 as straight-through, redundant, local or remote. Straight-through (Direct Link Mode): the ports should be connected with Ethernet devices and cannot be connected into a ring.
  • Page 64: Bottom Panel

    Kyland Technology Attention: In the redundant ring network, only one switch can be set as the Master and others are set as Slaves. 3.2.4 Bottom panel There is a grounding screw hole at the bottom panel of KIEN6000. As shown in Figure 3-8, the grounding wire is connected to the cold pressed terminal.
  • Page 65: Chapter 4 Installation

    Kyland Technology Chapter 4 Installation 4.1 Requirements The switch is single-body structure and can be directed locked on the standard 35mm DIN rail or is mounted on vertical walls or internal walls of the switch cabinet with the wall mounting part.
  • Page 66 Kyland Technology focus on two points below: 1. Ensure the DIN rail is fixed solidly, other units are not on it, and enough space is reserved for mounting the switch. 2. On the DIN rail, make sure there is power input that is suitable for operation of KIEN6000.
  • Page 67: Wall-Mounting

    In the situation that DIN rail-type mounting is inconvenient, it is better to adopt wall mounting. KYLAND provides users with wall mounting board that is mounting parts for mounting of KIEN5000. The size of wall mounting is shown in the Figure4-3. KIEN...
  • Page 68 Kyland Technology Attention: The wall mounting plate is not a part of the standard accessories of KIEN6000. If you need it, please order it additionally when you order the switch. The steps of wall mounting of KIEN6000 are as follows: 1....
  • Page 69: Cable Connection

    Kyland Technology screws into the plastic expansion bolts with a cross head screwdriver. But do not screw them tightly and keep a space of about 5mm. If the internal wall of the switch cabinet is selected, recommend to open 4 M3 screw holes when the switch cabinet is manufactured in accordance with the mounting size in the Figure 2-3.
  • Page 70: Optical Fiber Cable Wiring

    Kyland Technology 2. Network management KIEN6000 is connected with the serial port of PC via the console interface of the top panel. Users can make a network management cable with proper length according to Figure 3-7. 3. Power input Use the right power supply as instruction on KIEN6000. After other cables are connected, power cable can be connected.
  • Page 71: Cable Wiring

    Kyland Technology Figure 4-6 Optical Fiber Cable Wiring 4. Upon finishing connection, check the LNK/ACT indicator for the optical port on the front panel of the switch. On means effective connection. 4.5 Cable wiring Cable wiring should meet the following requirements: 1....
  • Page 72 Kyland Technology turnings should be bundled and fixed. 8. If cables, power line and grounding conductor are laid in the same channel, cables, power line and grounding conductor should be not folded or blended together. If a cable line is overly long, coil and place it in the middle of the cabling rack, do not let it cover on other cables.
  • Page 73: Chapter 5 Test Method

    Kyland Technology Chapter 5 Test Method 5.1 Self-test After the switch is powered, the POW LED is always on, and RUN LED is on/blinking/off according to the property set by the DIP switch. 5.2 Test TP ports Power KIEN6000 as shown in Fig. 5-1, make any two TP ports connect with the network port of the two testing PCs by straight-through cable, transmit Ping command mutually, both sides can correctly Ping to each other and no data package is lost.
  • Page 74: Test Fiber Port

    Kyland Technology 5.3 Test fiber port Connect the two switches of KIEN6000 into chain optical network. Any one TP port of each switch is connected to PC by straight through cable and transmit PING command mutually, both sides can correctly Ping to each other and no data package is lost. Meanwhile, the corresponding LINK/ACT lamp is always on.
  • Page 75: Chapter 6 Networking & Configurations

    Kyland Technology Chapter 6 Networking & Configurations 6.1 Networking mode KIEN6000 offers 4 RJ45 ports of 10/100Base-TX, each of which can be connected to terminal devices directly or to another industrial Ethernet switch, hub as share. KIEN6000 also has 2 pair of uplink fiber ports of 100Base-FX, by which redundant optical ring network can be formed with recovery time less than 100ms.
  • Page 76 Kyland Technology KIEN6000 can also used as shown in Fig 6-2, which is a double redundant ring network, any network failure can be recovered within 100ms. Figure 6-2 Double redundant ring network Attention: When KIEN6000 forms a redundant ring network, connection of fiber port 4 and 8 are recommended, namely, the fiber port 4 of one switch shall be connected with the fiber port 8 of another switch.
  • Page 77: System Configuration

    KIEN6000 6.2 System configuration KIEN5000 is an integrated structure, the 4 10Base-T/100Base-TX Ethernet RJ-45 ports, 2 uplink redundant 10Base-T/100Base-TX RJ45 ports and 2 pair of uplink 100Base-FX fiber ports are fixed configuration. The fiber port connector can be SC/FC/ST. The power supply voltage is 24VDC(18 ~...
  • Page 78: Appendix A Twisted-Pair And Pin Distribution

    Kyland Technology Appendix A Twisted-pair and Pin Distribution For the connection of 10Base-T/100Base-TX, the twisted-pair must have two pair cable. Each pair is distinguished with two different colors. For example, one strand is green, and the other is the alternate of green and white stripes. RJ-45 connector should be equipped at both ends of the cable.
  • Page 79 Kyland Technology Table A-1 Pin distribution of 10Base-T/100Base-TX MDI-X signal name MDI signal name Receiving data + Output data+ (RD+) (TD+) Receiving data - Output data - (RD-) (TD-) Output data + Receiving data+ (TD+) (RD+) Output data- Receiving data -...
  • Page 80: Appendix B Cable Type And Specifications

    Kyland Technology Appendix B Cable Type and Specifications The cable type and specifications are shown as table B-1: Table B-1 Cable type and specifications Conne Cable Type Max. length ctor 10Base- Cat.3, 4 and 5 100 100m(328 RJ-45 ohm UTP...
  • Page 81: Appendix C Glossary

    Kyland Technology Appendix C Glossary Terminology Explanation Twisted-pair standard of Cat3, Cat4 and Cat5 in IEEE 10Base-T specification for 10Mbps Ethernet Twisted-pair standard of Cat5 or above in IEEE 100Base-TX specification for 100Mbps Fast Ethernet Fast Ethernet which uses one pair of multi-mode or single 100Base-FX mode optical fiber to transmit.
  • Page 82 Kyland Technology It is the Medium Dependent Interface, in which, one Ethernet port is taken as the receiving terminal to connect to the port of other equipment. MDI-X Medium Dependent Interface Cross-over -37-...

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