NETGEAR GS748TNA, GS748TS-100NAS user manual Category 5 Cable Specifications, Twisted Pair Cables

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GS748T Software User Manual

Category 5 Cable Specifications

Ensure that the fiber cable is crossed over to guarantee link.

Table C-1lists the electrical requirements of Category 5 UTP cable.

Table C-1. Electrical Requirements of Category 5 Cable

Specifications

Category 5 Cable Requirements

 

 

Number of pairs

Four

 

 

Impedance

100 ± 15%

 

 

Mutual capacitance at 1 KHz

5.6 nF per 100 m

 

 

Maximum attenuation

at 4 MHz: 8.2

(dB per 100 m, at 20° C)

at 31 MHz: 11.7

 

at 100 MHz: 22.0

NEXT loss (dB minimum)

at 16 MHz: 44

 

at 31 MHz: 39

 

at 100 MHz: 32

 

 

Twisted Pair Cables

For two devices to communicate, the transmitter of each device must be connected to the receiver of the other device. The crossover function is usually implemented internally as part of the circuitry in the device. Computers and workstation adapter cards are usually media-dependent interface ports, called MDI or uplink ports. Most repeaters and switch ports are configured as media-dependent interfaces with built-in crossover ports, called MDI-X or normal ports. Auto Uplink technology automatically senses which connection, MDI or MDI-X, is needed and makes the right connection.

Figure C-1illustrates straight-through twisted pair cable.

C-2

Network Cabling

v2.0, April 2007

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Contents NETGEAR, Inc Certificate of the Manufacturer/Importer TrademarksStatement of Conditions Bestätigung des Herstellers/ImporteursRegulatory Compliance Information Europe EU Declaration of ConformityFCC Requirements for Operation in the United States FCC Information to UserGS748T Smart Switch Product and Publication Details Contents Appendix a Specifications and Default Values Appendix C Network Cabling V2.0, April How to Use This Book About This ManualWho Should Use this Book Conventions, Formats and Scope BoldHow to Print this Manual Html Manual NavigationRevision History Document Date Version Description Part NumberChapter Switch Management Overview Switch Management InterfaceSwitch Management Methods System RequirementsGetting Started-Smart Wizard Discovery Network with Dhcp serverNetwork without Dhcp Server Manually Assigning Network Parameters V2.0, April Web Access Password ChangeAdditional Utilities Firmware Upgrade Exit V2.0, April Chapter Basic Web Management Starting Web ManagementNetgear Home Page and Switch Status V2.0, April Description of Switch Status Parameters V2.0, April System Functions Managing System Files-Backup and Restore Firmware MenuFactory Reset To restore saved settingsTo back up files Resetting the System LogoutV2.0, April Chapter Configuring the Switch Using the Switch Configuration UtilityPort Configuration Viewing Packet Statistics V2.0, April Regulating Traffic Rates using Quality of Service Settings Port-based QoSIeee 802.1p-based QoS Differentiated Services Code Point DSCP-based QoS Vlan Adding and Configuring Ieee 802.1Q Vlan Groups Reconfiguring an Ieee 802.1Q Vlan Group Adding and Configuring Port-based VLANs Reconfiguring a Port-based VlanCreating Port Trunks to Increase Link Bandwidth Selecting a Management VlanSetting up Port Trunks Using a Sniffer Port to Monitor Traffic Removing Port TrunksJumbo Frame Support Controlling Per-port Packet ThroughputUsing Spanning Tree Protocol to Prevent Path Loops Storm Control Dropping Traffic that is Flooding a PortV2.0, April V2.0, April Enabling Switch Management using Snmp Controlling Switch Access by MAC Address and Vlan ID To Add a MAC AddressUsing Igmp Snooping to Route Packets Based on Content Filtering Unknown Multicast PacketsTo Remove a MAC Address from the Table Setting Up Static Multicast Groups V2.0, April Appendix a Specifications and Default Values GS748T Smart Switch SpecificationsGS748T Smart Switch Features and Defaults Table A-3. Port CharacteristicsTable A-8. Other Features Smart Wizard Enabled Statistics Per port Appendix B Virtual Local Area Networks VLANs Ieee 802.1Q VLANs ExamplePort-based Vlan Example Configuration Port-based VLANsResults of this Configuration Appendix C Network Cabling Fast Ethernet Cable GuidelinesCategory 5 Cable Category 5 Cable Specifications Twisted Pair CablesPatch Panels and Cables Figure C-1Straight-Through Twisted-Pair CableUsing 1000BASE-T Gigabit Ethernet over Category 5 Cable CablingNear End Cross Talk Next LengthReturn Loss RJ-45 Plug and RJ-45 Connectors Patch CablesConclusion V2.0, April