Accton Technology 12se manual Installing the System

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Fast EtherHub-12se User’s Guide

Precise Cable Length Budgeting

If you plan on installing a network for a small office, it may not be convenient to place hubs within 5 meters of each other, and then run up to 100 meters of cabling for each end user. This kind of installation can be very messy and wastes a lot of cabling. Depending on how your users are spread out, it may be more convenient to run a longer length of inter-hub cabling (say 50 meters or more), and then run shorter lengths of cable from each hub to the end users. Depending on the inherent delay in the hub and the maximum cable lengths required, it may even be possible to cascade up to three Fast Ethernet hubs.

However, when setting up these kinds of distributed cascades, you have to be very careful in calculating the maximum length for each node pair. All end- node devices (e.g., workstations or servers) must be within 100 meters of the connected hub when using twisted-pair cabling, or within 112 meters when using fiber optic cabling. However, when linking one or more Fast Ethernet repeaters together (i.e., in the same collision domain), the overall length of cable used between any two nodes should not exceed the limits outlined in the IEEE 802.3u standard. In precise terms, the maximum length of cabling that can be run from end-node to end-node is

367m ³ S(repeater equivalent length)

+ S(length of category 5 twisted-pair cable)

+ (0.9 * S(length of fiber optic cable1)) 1 - if fiber is used

This repeater has an inherent delay of 90 bit time or 80 meters of twisted-pair cable. Taking a daisy chain of two hubs connected with twisted-pair cabling for an example, the maximum length from node to node is 367m - (2 x 80m) = 207m. Therefore, if both node A and B are linked to separate repeaters in a two hub system, each using 100 meters of cable to connect to their respective hub, then the inter-hub cabling will be limited to 5 meters (i.e., 207m - 2x100m = 7m, which is then reduced to 5 meters according to a common wiring rule).

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Installing the System

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Contents Fast EtherHub-12se Installation Manual QWHUQDWLRQDO+HDGTXDUWHUV Package Contents Quick Installation Fast EtherHub-12se User’s Guide About this Guide Contents Appendix C Specifications Appendix a TroubleshootingAppendix E Product Support Services Appendix B Port and Cable AssignmentsList of Tables Glossary Index List of FiguresAccton’s Fast EtherHub System Product OverviewIntroduction to Fast Ethernet Basic Features Fast EtherHub-12se User’s Guide Connecting the Hub System Installing the SystemPre-Installation Requirements Making Fiber Optic Connections Making RJ-45 ConnectionsDistance Limit for Fast Ethernet Cabling Installing the System Verifying Port Status Providing Power to the EtherHubVerifying System Operation Stand-Alone Configuring the NetworkConnecting Multiple Hubs Using the RJ-45 Daisy-Chain Port Precise Guidelines for Configuring Multiple Hubs Figure -4 Cabling Limits for Multiple Hub Configuration Front Panel HardwareReferenceColor Red Label Alert Function Fan status SmartWatch Indicator PanelHardware Reference Color Red Label Fiber Optic Ethernet Port RJ-45 Ethernet PortsRear Panel Power SocketDiagnosing Hub Indicators Appendix a TroubleshootingInstallation System DiagnosticsConfiguration Hub IntegrityRJ-45 Port Appendix B6WDURU7UHH Appendix C Product SpecificationsFCC Class B Certification Appendix DEMI Certification Voluntary Control Council for Interference VCCI-2 European Community Immunity Requirements CE Mark Declaration of Conformance for EMI and SafetyUnderwriters Laboratories Inc Safety ComplianceSicherheitshinweise Problem Report Appendix E Product Support ServicesHardware Repair Service Product RegistrationInteractive Fast Fax U.S.A. office Software Update and Upgrade ServiceBulletin Board Service BBS International Headquarters Technical SupportCustomer Remedies Limited WarrantyNorth and South America Return ProcessOrdering Information Accton Offices100BASE-TX GlossaryLED RJ-45 Connector Index Index EH3012-TF E1296-R01
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12se specifications

Accton Technology, a prominent player in the networking industry, has developed a range of high-performance switches designed to meet the demands of modern network infrastructures. Among their notable products are the EH3012C and EH3008C switches, equipped with advanced features that cater to various networking needs.

The EH3012C is a 12-port managed switch that offers a robust solution for enterprise networks. One of its standout features is its support for Layer 2/Layer 3 switching, providing flexibility for users to implement different networking protocols as needed. This switch is designed with scalability in mind, featuring high bandwidth capacities and low latency, making it suitable for high-traffic environments. Its advanced Quality of Service (QoS) capabilities allow for efficient traffic management, ensuring that critical applications receive the necessary bandwidth for optimal performance.

On the other hand, the EH3008C is an 8-port managed switch that serves as an ideal solution for small to medium-sized networks. With support for PoE (Power over Ethernet), the EH3008C significantly simplifies deployment by allowing devices such as IP cameras and access points to receive power directly through the Ethernet cable. This eliminates the need for separate power supplies and reduces clutter.

Both switches utilize advanced security features, including VLANs, port security, and Access Control Lists (ACLs), ensuring that sensitive data is protected against unauthorized access. Additionally, they support SNMP (Simple Network Management Protocol) for comprehensive monitoring and management, allowing administrators to maintain control over their network environments efficiently.

Integrating advanced technologies like SDN (Software-Defined Networking), Accton’s switches enable businesses to future-proof their network architecture. The EH3012C and EH3008C can easily adapt to evolving network demands, providing just the right mix of performance, security, and management capabilities. Furthermore, their energy-efficient designs contribute to reduced operational costs, making them a sustainable choice for organizations looking to minimize their environmental impact.

In summary, Accton Technology's EH3012C and EH3008C switches deliver powerful, feature-rich solutions tailored to both large and smaller networks. With their versatile management options, enhanced security features, and support for emerging technologies, these switches stand out as indispensable tools for building resilient and efficient networking infrastructures.