Enterasys Networks C2K122-24 manual Four-Wire Crossover Cable RJ45 Pinouts for 10/100BASE-TX

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Connecting to the Network

3.Verify that a link exists by checking that the Link/Activity LED is ON (solid green or blinking green). If the Link/Activity LED is OFF, perform the following steps until it is on:

a.Verify that the cabling being used is Category 5 or better with an impedance between 85 and 111 ohms with a maximum length of 100 meters (328 feet).

b.Verify that the device at the other end of the twisted pair segment is on and properly connected to the segment.

c.Verify that the RJ45 connectors on the twisted pair segment have the proper pinouts and check the cable for continuity. Typically, a crossover cable is used between hub devices. A straight‐through cable is used to connect between switches or hub devices and an end user (computer). Refer to Figure 3‐13 and Figure 3‐14 for four‐wire RJ45 connections. Refer to Figure 3‐15 and Figure 3‐16 for eight‐wire RJ45 connections.

d.Ensure that the twisted pair connection meets the dB loss and cable specifications outlined in the Cabling Guide. Refer to “Related Documents” on page xvi for information on obtaining this document.

4.If a link is not established, contact Enterasys Networks. Refer to “Getting Help” on page 1‐5 for details.

Repeat all steps above until all connections have been made.

Figure 3-13 Four-Wire Crossover Cable RJ45 Pinouts for 10/100BASE-TX

 

À

 

 

RX+

1

RX–

2

Ã

 

TX+

3

TX–

6

Â

Á

1RX+

2 RX–

3TX+

6 TX–

1

RJ45 switch port

3

RJ45-to-RJ45 crossover cable

2

Other device port

4

RX+/RX- and TX+/TX-connections

 

 

 

These connections must share a common color pair.

SecureStack C2 Installation Guide 3-21

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Contents Enterasys SecureStack C2 Page Page Regulatory Compliance Information Electromagnetic Compatibility EMC Supplement to Product Instructions Vcci Notice Declaration of Conformity Enterasys NETWORKS, INC Firmware License Agreement Viii Page Page Contents Troubleshooting Figures Xiv How to Use This Guide About This GuideWho Should Use This Guide For Refer to Related DocumentsFollowing conventions are used in this guide Conventions Used in This GuideConventions Used in This Guide Xviii About This Guide Overview IntroductionC2K122-24 C2K122-24 Stackable Switch FrontDescription of XFPs Redundant Power Supply CapabilityConnectivity High-Speed Stack ConnectionsManagement Lanview Diagnostic LEDsSwitch Configuration Using WebView Switch Configuration Using CLI CommandsSupport@enterasys.com Getting HelpGetting Help Introduction 10BASE-TX Network Network Requirements100BASE-TX Network 1000BASE-T Network10GBASE-XX Network Type Max. Length Connector Recommended Cable Types and Specifications10GBASE-XX Network Network Requirements Hardware Installation Required Tools Considerations Prior to InstallationUnpacking the Switch Contents of Switch Carton QuantityPreparation Installing Optional XFPsRemoving the XFP Installing the XFPInstalling the Rubber Feet Installing the Switch on a Flat SurfaceChassis Bottom, Rubber Feet Placement Guidelines for InstallationArea Guidelines for Switch Installation on Flat Surface Rack Mounting the SwitchAttaching Brackets and Installing in Rack Guidelines for Rackmount InstallationFastening the Switch to the Rack Connecting High-Speed Stacking CablesHigh-Speed Stacking Cable Connections Configuring Switches in a StackAbout SecureStack C2 Switch Operation in a Stack Installing a New Stackable System of Up to Eight Switches Recommended Procedures for New and Existing StacksAC Power Connecting AC and RPS PowerSwitch Rear View Stack Initialization Overview RPS PowerWhat Is Needed Connecting to Console Port for Local ManagementParameter Setting Connecting to an IBM or Compatible Device10 Connecting a VT Series Terminal Connecting to a VT Series Terminal11 Connecting to a Modem Connecting to a ModemConnecting UTP Cables Connecting to the Network13 Four-Wire Crossover Cable RJ45 Pinouts for 10/100BASE-TX TX1+ RX1- TX2+ TX3+ RX3- RX2- TX4+ RX4 Connecting Fiber-Optic Cables to LC Ports Connecting to the Network 17 Cable Connection to LC Fiber-Optic Connectors Initial Logon to Switch Management Completing the InstallationTroubleshooting C2K122-24 Lanview LEDs Using LanviewColor State Recommended Action Lanview LEDsRPS Refer to the SecureStack C2 Configuration Guide for proper Troubleshooting ChecklistRefer to the SecureStack C2 Configuration Guide for the IP Password Reset Switch Using the Password Reset SwitchUsing the Password Reset Switch Troubleshooting Specifications Environmental Switch SpecificationsTable A-1 Switch Specifications C2K122-24 PhysicalSpecification Supported XFP Transceiver Interface OptionsTable A-2 Supported XFP Transceivers Console Port Pinout Assignments Regulatory ComplianceTable A-5 Compliance Standards Regulatory Compliance Numerics IndexInstallation of 3-3specifications for A-3