Transition Networks SM24-100SFP-AH manual Connectivity Rules, 1000BASE-T Cable Requirements

Page 38

4 Making Network Connections

The maximum length for fiber optic cable operating at Fast Ethernet speed will depend on the fiber type as listed under “100 Mbps Fast Ethernet Collision Domain” on page 4-5. The maximum length for fiber optic cable operating at Gigabit speed will depend on the fiber type as listed under “1000 Mbps Gigabit Ethernet Collision Domain” on page 4-4.

Connectivity Rules

When adding hubs (repeaters) to your network, please follow the connectivity rules listed in the manuals for these products. However, note that because switches break up the path for connected devices into separate collision domains, you should not include the switch or connected cabling in your calculations for cascade length involving other devices.

1000BASE-T Cable Requirements

All Category 5 UTP cables that are used for 100BASE-TX connections should also work for 1000BASE-T, providing that all four wire pairs are connected. However, it is recommended that for all critical connections, or any new cable installations, Category 5e (enhanced Category 5) or Category 6 cable should be used. The Category 5e specification includes test parameters that are only recommendations for Category 5. Therefore, the first step in preparing existing Category 5 cabling for running 1000BASE-T is a simple test of the cable installation to be sure that it complies with the IEEE 802.3-2005 standards.

1000 Mbps Gigabit Ethernet Collision Domain

Table 4-1. Maximum 1000BASE-T Gigabit Ethernet Cable Length

Cable Type

 

 

Maximum Cable Length

Connector

Category 5, 5e, 6 100-ohm UTP or STP

 

100 m (328 ft)

RJ-45

 

 

 

 

 

 

 

 

 

 

 

 

Table 4-2. Maximum 1000BASE-SX Gigabit Ethernet Cable Length

 

 

 

 

 

 

Fiber Size

Fiber Bandwidth

Maximum Cable Length

Connector

 

 

 

 

 

 

 

 

62.5/125 micron

160 MHz/km

 

 

2-220 m (7-722 ft)

 

LC

multimode fiber

 

 

 

 

 

 

 

200 MHz/km

 

 

2-275 m (7-902 ft)

 

LC

 

 

 

 

 

 

 

 

 

 

 

 

 

50/125 micron multimode

400 MHz/km

 

 

2-500 m (7-1641 ft)

 

LC

fiber

 

 

 

 

 

 

 

500 MHz/km

 

 

2-550 m (7-1805 ft)

 

LC

 

 

 

 

 

 

 

 

 

 

 

 

Table 4-3. Maximum 1000BASE-LX Gigabit Ethernet Cable Length

 

 

 

 

 

 

 

Fiber Size

 

Fiber Bandwidth

 

 

Maximum Cable Length

Connector

 

 

 

 

 

 

 

9/125 micron

 

N/A

 

 

2 m - 5 km (7 ft - 3.2 miles)

LC

single-mode fiber

 

 

 

 

 

 

 

 

4-4

Page 37 Page 39
Image 38
Page 37 Page 39
Contents SM24-100SFP-AH Page Fast Ethernet Switch SM24-100SFP-AH E082008-DT-R01 150200069500A Compliances and Safety Warnings LVD Warnhinweis Faseroptikanschlüsse Optische Sicherheit IiiPower Cord Set France et Pérou uniquement Sein und die Aufschrift HAR oder Basec tragen Documentation End of Product Life SpanManufacturing Materials ViiAbout This Guide ViiiContents Contents Switch Features Management Features Standards CompliancesTables Figure B-1 RJ-45 Connector Pin Numbers FiguresIntroduction OverviewNetwork Management Options Switch ArchitectureDescription of Hardware SFP SlotsPort and System Status LEDs LEDSystem Status LED System Status LEDs Connectivity Features and BenefitsPower Supply Sockets ExpandabilityManagement Introduction to Switching Network PlanningNetwork Planning Application ExamplesCollapsed Backbone Network Aggregation Plan Network Aggregation PlanRemote Connection with Fiber Cable Remote Connection with Fiber CableMaking Vlan Connections Making Vlan ConnectionsApplication Notes Package Contents Installing the SwitchEquipment Checklist Selecting a SiteOptional Rack-Mounting Equipment Installing the SwitchMounting Rack MountingDesktop or Shelf Mounting 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 Sgnd signal groundMaking Network Connections Connecting Network DevicesConnecting to PCs, Servers, Hubs and Switches Twisted-Pair DevicesNetwork Wiring Connections Making Network ConnectionsFiber Optic SFP Devices Making Fiber Port ConnectionsMbps Gigabit Ethernet Collision Domain Connectivity Rules1000BASE-T Cable Requirements Mbps Fast Ethernet Collision Domain Mbps Ethernet Collision DomainCable Labeling and Connection Records Diagnosing Power Problems with the LEDs Appendix a TroubleshootingDiagnosing Switch Indicators In-Band Access Power and Cooling ProblemsInstallation Troubleshooting10BASE-T/100BASE-TX Pin Assignments Appendix B CablesTwisted-Pair Cable and Pin Assignments Cables Straight-Through WiringCrossover Wiring 1000BASE-T Pin Assignments Twisted-Pair Cable and Pin Assignments BCable Testing for Existing Category 5 Cable Appendix C Supported SFP Transceivers Supported SFP Transceivers Appendix D Specifications Physical CharacteristicsSpecifications Switch FeaturesManagement Features Standards D StandardsCompliances Specifications Glossary Glossary-1Glossary Glossary-2Ieee 802.3u Glossary-3TIA Glossary-4Index Index-1Index Index-2Page SM24-100SFP-AH E082008-DT-R01 150200069500A
Top Page Image Contents