Accton Technology ES3002-TF manual Fast SwitcHub-2se User’s Guide

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Fast SwitcHub-2se User’s Guide

For a sample calculation, assume the following values:

∙cable gauge - 62.5/125 mm, which means a 13 dB power budget,

∙2 patch panels between the switches, each with 0.5 dB power loss, and

1 splice with 0.4 dB power loss (i.e., 2 * 0.5 + 0.4 = 1.4 dB power loss for intervening devices), and

∙inherent power loss in the cable is 4.5 dB/km

The maximum cable length is therefore:

m ≤ 13 dB - 1.4 dB ≤ 2.58 km

4.5dB/km

ΙWhen the 100BASE-FX link is used for a dedicated connection (i.e., full-duplex communications), cable length should not exceed 2 kilometers. However, when the link is used for a shared collision domain (i.e., half-duplex communications), cable length should not exceed 412 meters (IEEE 802.3u).

Note: Even though your calculations for power loss may indicate a longer permissible length based on signal strength (as seen in the preceding example), we advise remaining within the recommended limits.

3.Set the communication mode via the Configure button to full-duplex or half-duplex mode to match the connected device. (Refer to Setting the

Communication Mode in Chapter 3.)

2-4	Setup and Configuration

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Contents SwitcHub-2se SwitcHub-2se QWHUQDWLRQDO+HDGTXDUWHUV Package Contents Quick Installation Fast SwitcHub-2se User’s Guide About this Guide Contents Appendix B Port and Cable Assignments Appendix a TroubleshootingAppendix C Specifications Hardware ReferenceAppendix D Regulatory Standards Compliance Appendix E Product Support ServicesGlossary Index Introduction Switching TechnologyAccton’s Smart Extender Switching Methods Features of the Fast SwitcHub-2se Fast SwitcHub-2se User’s Guide Pre-Installation Requirements Setup and ConfigurationConnecting the Switch System Making RJ-45 Connections Communication Mode in ChapterDescription Making Fiber Optic ConnectionsFast SwitcHub-2se User’s Guide Diagnostic Tests Providing Power to the SwitcHubSetting the Display Mode Selections Available Diag on Verifying System Operation Verifying Port StatusFast SwitcHub-2se User’s Guide Front Panel Hardware ReferenceConfigure Button Color Green Label Power Function Power indicator SmartWatch Indicator PanelChapter for instructions on how to select the display mode Fast SwitcHub-2se User’s Guide Setting the Communication Mode Full/Half Duplex Color Green Active LED Port Diagnostic Test Transmit TX Indicates outgoing traffic traversing the port Ethernet Ports Rear PanelPower Socket Diagnosing Switch Indicators Appendix a TroubleshootingPage Switch Integrity ConfigurationRJ-45 Port Appendix BProduct Specifications Appendix C SpecificationsEMI Warning Appendix DFCC Class B Certification Voluntary Control Council for Interference VCCI-2 CE Mark Declaration of Conformance Underwriters Laboratories Compliance Statement Safety ComplianceFast SwitcHub-2se User’s Guide Sicherheitshinweise Product Registration Appendix E Product Support ServicesProblem Report Hardware Repair ServiceBulletin Board Service BBS Software Update and Upgrade ServiceInteractive Fast Fax U.S.A. office International Headquarters USA Headquarters Technical SupportCustomer Remedies Limited WarrantyNorth and South America Return ProcessOrdering Information Accton Offices10BASE-T GlossaryLED RJ-45 Connector Index Index ES3002-TF E0596-R01