SMC Networks SMC8126PL2-F manual Fiber Standards, Cable Testing for Existing Category 5 Cable

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B Cables

Cable Testing for Existing Category 5 Cable

Installed Category 5 cabling must pass tests for Attenuation, Near-End Crosstalk (NEXT), and Far-End Crosstalk (FEXT). This cable testing information is specified in the ANSI/TIA/EIA-TSB-67 standard. Additionally, cables must also pass test parameters for Return Loss and Equal-Level Far-End Crosstalk (ELFEXT). These tests are specified in the ANSI/TIA/EIA-TSB-95 Bulletin, “The Additional Transmission Performance Guidelines for 100 Ohm 4-Pair Category 5 Cabling.”

Note that when testing your cable installation, be sure to include all patch cables between switches and end devices.

Adjusting Existing Category 5 Cabling to Run 1000BASE-T

If your existing Category 5 installation does not meet one of the test parameters for 1000BASE-T, there are basically three measures that can be applied to try and correct the problem:

1.Replace any Category 5 patch cables with high-performance Category 5e or Category 6 cables.

2.Reduce the number of connectors used in the link.

3.Reconnect some of the connectors in the link.

Fiber Standards

The International Telecommunication Union (ITU-T) has standardized various fiber types for data networks. These are summarized in the following table.

Table B-3 Fiber Standards

ITU-T	Description	Application
Standard

G.651	Multimode Fiber	Short-reach connections in the
	50/125-micron core	1300-nm or 850-nm band

G.652	Non-Dispersion-Shifted	Longer spans and extended reach.
	FiberSingle-mode, 9/125-micron core	Optimized for operation in the
		1310-nm band. but can also be used
		in the 1550-nm band

G.652.C	Low Water Peak	Longer spans and extended reach.
	Non-Dispersion-Shifted Fiber	Optimized for wavelength-division
	Single-mode, 9/125-micron core	multiplexing (WDM) transmission
		across wavelengths from 1285 to
		1625 nm. The zero dispersion
		wavelength is in the 1310-nm region.

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Contents Installation Guide TigerSwitch 10/100/1000 Installation Guide Page Warranty and Product Registration Compliances and Safety Warnings CE Mark Declaration of Conformance for EMI and Safety EEC Safety Compliance France and Peru only France et Pérou uniquement Francia y Perú únicamente Vii Advertencias y mensajes de precaución Purpose Page Contents Appendix a Troubleshooting Contents Tables Figures Xvi Front Panel Power-over-Ethernet Capability Switch ArchitectureNetwork Management Options Description of Hardware 10/100/1000BASE-T PortsSFP Slots Port and System Status LEDsLED Optional Redundant Power Unit Mode PoE/Link ButtonPower Supply Socket Features and Benefits ConnectivityExpandability PerformanceIntroduction to Switching Network PlanningApplication Examples Collapsed BackboneNetwork Aggregation Plan Network Aggregation PlanRemote Connections with Fiber Cable Remote Connections with Fiber CableMaking Vlan Connections Making Vlan ConnectionsApplication Notes Selecting a Site Installing the SwitchEthernet Cabling Package Contents Equipment ChecklistOptional Rack-Mounting Equipment Mounting Rack MountingInstalling the Switch in a Rack Desktop or Shelf MountingInstalling an Optional SFP Transceiver Inserting an SFP Transceiver into a SlotConnecting to a Power Source Connecting to the Console PortWiring Map for Serial Cable Serial Cable Wiring Switch’s 8-Pin Null Modem PC’s 9-PinInstalling the Switch Connecting Network Devices Making Network ConnectionsTwisted-Pair Devices Cabling GuidelinesConnecting to PCs, Servers, Hubs and Switches Network Wiring ConnectionsNetwork Wiring Connections Fiber Optic SFP DevicesConnectivity Rules Making Connections to SFP TransceiversMbps Gigabit Ethernet Collision Domain 1000BASE-T Cable RequirementsMbps Fast Ethernet Collision Domain Cable Labeling and Connection Records Mbps Ethernet Collision DomainDiagnosing Switch Indicators Appendix a TroubleshootingPower and Cooling Problems Installation In-Band AccessTwisted-Pair Cable and Pin Assignments Appendix B Cables10BASE-T/100BASE-TX Pin Assignments Straight-Through Wiring Crossover Wiring1000BASE-T Pin Assignments Twisted-Pair Cable and Pin Assignments BAdjusting Existing Category 5 Cabling to Run 1000BASE-T Cable Testing for Existing Category 5 CableFiber Standards Dispersion-Shifted Fiber Cables Appendix C Specifications Physical CharacteristicsSwitch Features Management FeaturesStandards CompliancesSpecifications Appendix D Ordering Information Ordering Information Glossary 10BASE-TCSMA/CD LED UTP Index NumericsIndex-2 Page 150200000032A R01