Évaluations - 3, GPA: 3.7
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Limit total network span When connecting devices to the dual-speed hub, note that the total network span must be limited to: Single Hub 200 meters of twisted-pair cable Two-hub Chain 205 meters of twisted-pair cable (for Fast Ethernet links) For example, if two PCs are connected to a hub, each using 100 meters (328 feet) of twisted-pair cable, then the total network span of 200 meters (656 feet) is within the allowed limits. However, if you cascade two Fast Ethernet hubs, and connect a PC to each hub, each using 100 meters of cable, as in the preceding example, then you can only use 5 meters (16 feet) of twisted-pair cable to link the two hubs together. The only way to extend the cabling that connects the hubs is to reduce the length of cable used to connect the PCs to the hubs. Quick Installation CheetaHub Power-3012B User’s Guide 5. Connect other media types using the D-type MII port. Attach to alternate media You can also connect to other network devices using the types via the Class I MII port media independent interface (MII) on the back panel. You can attach to 100BASE-TX (operating at 100 Mbps only), 100BASE-T4 or 100BASE-FX media types by plugging the appropriate transceiver into the MII connector. This port can be used to connect the hub to a collapsed backbone, or for media conversion to a compatible network device. However, note that the MII Port is Class I, and therefore cannot be cascaded to another hub. Limits on total network When connecting a switch or router to the MII port with span also apply to MII port twisted-pair cable, the maximum network span is 200 meters or 656 feet (i.e., 100 meters for the downlink from the switch or router to the hub, and 100 meters from hub to workstation). However, by attaching fiber-optic cable to the MII port on the rear panel, the maximum network span can be extended to 260 meters or 853 feet (i.e., 160 meters for the fiber optic downlink from the hub to the switch or router, and 100 meters from hub to workstation). 6. These hubs can serve as a collapsed backbone for small networks, or can be connected to a network interconnection device via one of the RJ-45 ports or the MII port. (Refer to Chapter 3 for sample applications.) 7. Verify network communications by ensuring that: · you have made all the necessary connections · you can access any connected resources · the hub’s indicators are functioning properly If you encounter any problems installing this dual-speed CheetaHub, refer to Chapter 2 for a detailed description of installation procedures, Chapter 3 for sample configurations, or Appendix A for help in troubleshooting. Quick Installation About this Guide This guide is designed for the experienced network installer. It describes how to install and operate Accton’s dual-speed CheetaHub. After reading this manual, you should be able to use the front display panel and configure options to manage all your network connections. This manual covers the following topics: Chapter 1 -Product Overview Brief description of Fast Ethernet technology, followed by a description of this hub and a summary of its important features and specifications. Chapter 2 -Installing the System Installing a dual-speed CheetaHub and making basic network connections. Chapter 3 -Setting up Network Connections Shows sample network configurations for a local area network. Appendices - Troubleshooting, cable assignments, and product specifications. About this Guide vii Contents Chapter 1: Product Overview 1-1 Introduction to Fast Ethernet 1-1 Accton’s Dual-Speed CheetaHub System 1-1 Basic Features 1-2 Chapter 2: Installing the System 2-1 Pre-Installation Requirements 2-1 Hardware Installation 2-2 Stacking Hubs on a Flat Surface 2-2 Mounting Hubs in a Rack 2-3 Connecting the Hub System 2-4 Making a Connection via an MDI-X Station Port 2-4 Making a Connection via the Daisy-Chain Port 2-5 Restrictions on Cascade Length 2-6 Making a Connection via the MII Port 2-7 Providing Power to the Hub 2-8 Connecting to the Power Supply 2-8 Diagnostic Tests 2-8 Hot Remove 2-8 Fuse 2-9 Verifying Port Status 2-9 Verifying System Operation 2-10 Chapter 3: Configuring the Network 3-1 Stand-Alone Network 3-1 Cascading Hubs with the Daisy-Chain Port 3-2 Making an Uplink with Fiber Optic Cable 3-4 Appendix A: Troubleshooting A-1 Diagnosing Hub Indicators A-1 System Diagnostics A-2 Installation A-2 Configuration A-2 System Integrity A-3 Contents ix CheetaHub Power-3012B User’s Guide Appendix B: Port and Cable Assignments B-1 RJ-45 Port B-1 MII Port B-2 Appendix C: Product Specifications C-1 Repeater Criteria C-1 Network Criteria C-1 Internal Switching Criteria C-2 Appendix D: Standards Compliance D-1 EMI Warning D-1 FCC Class B D-1 Voluntary Control Council for Interference (VCCI-B) D-2 EN55022 Declaration of Conformance D-2 Safety Compliance D-3 Underwriters Laboratories Compliance Statement D-3 Sicherheitshinweise D-4 Appendix E: Product Support Services E-1 Product Registration E-1 Problem Report E-1 Hardwa...