3Com 3CR17662-91 Ethernet Port RJ-45 Pin Assignments, 10/100 and 1000BASE-T RJ-45 connections

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90APPENDIX B: PIN-OUTS

Modem Cable	RJ-45 to RS-232 25-pin
	3Com Switch		RS-232 Modem Port
	Cable connector: RJ-45 female		Cable connector: 25-pin male
	Screen	Shell	1	Screen
	TxD	3	2	TxD
	RxD	2	3	RxD
	RTS	7	4	RT S
	CTS	8	5	CTS
	DSR	6	6	DSR
	Ground	5	7	Ground
	DCD	1	8	DCD
	DTR	4	20	DTR

Ethernet Port RJ-45 Pin Assignments

10/100 and 1000BASE-T RJ-45 connections.

Table 10 Pin assignments

Pin Number	10/100	1000

Ports configured as MDI
1	Transmit Data +	Bidirectional Data A+
2	Transmit Data –	Bidirectional Data A-
3	Receive Data +	Bidirectional Data B+
4	Not assigned	Bidirectional Data C+
5	Not assigned	Bidirectional Data C-
6	Receive Data –	Bidirectional Data B-
7	Not assigned	Bidirectional Data D+
8	Not assigned	Bidirectional Data D-

Table 11 Pin assignments

Pin Number	10/100	1000

Ports configured as MDIX
1	Receive Data +	Bidirectional Data B+
2	Receive Data -	Bidirectional Data B-

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Contents 3Com Switch 4200G Family 3Com Corporation Campus Drive Marlborough United States Government LegendPage Page Contents Installing the Switch Problem Solving PIN -OUTS About this Guide Conventions Icon DescriptionConvention Description Related DocumentationDocumentation Comments Pddtechpubscomments@3com.comIntroducing About the Switch 4200G Hardware Features Switch 4200GSwitch 4200G-Front View CommanderSwitch 4200G 48-Port-front view Display Mode LED Color Description Status DisplayMode LED Color Indicates10/100/1000BASE-T Port LEDs Rear View Detail Slots1000BASE-X Port SFP Port LEDs Rmon Alarm Feature Switch 4200G Automatic IP ConfigurationDuplex Mode Configuration SaveInstalling the Switch Package Contents Choosing a SuitableSite Rack-mounting To rack-mount your SwitchFront of the Switch, as shown in Figure Inch racksRepeat and for the other side of the Switch Fitting a Bracket for Rack-MountingSwitch 4200G Power-upPowered-up and ready for operation SequenceLEDs on page 54 for a list of suggested solutions SFP OperationSFP port Remove the plastic protective cover if fitted Inserting an SFP TransceiverCorrect Cables Your SwitchChoosing TransceiverChoosing the Correct Cables Installing the Switch Setting UP for Management Methods of Managing a Switch Command Line Interface ManagementRefer to Setting Up Command Line Interface Management on There are two main views in the CLI User ViewSystem View Setting Up OverviewSnmp Manual IP Configuration Automatic IP Configuration using DhcpManually Configuring IP Information Connecting the Workstation to the Switch PrerequisitesSetting Up the Switch with IP Information Enter the system-viewcommand and Enter Enter interface vlan 1 and EnterWith a Network Using the Web Interface Using Command Line Interface using Telnet Viewing Automatically Configured IP Information Enter the default gateway for the SwitchUsing 3Com Network Director Viewing IP Information using the Console Port Command Line Interface ManagementSetting Up Command Line Interface Management using SSHSetting Up Web InterfaceChoosing a Browser Over the Network Windows Red Hat2000 Windows XP Server Setting Up Snmp Management V1 or Default Users User Default Access Level Name PasswordSetting UP for Management Problem Solving Solving Problems Indicated by LEDsProblems Solving HardwareError message indicating that the SFP transceiver is faulty Unit fails, no Snmp fan failure message is receivedSolving Communication Problems IP AddressingHow do you obtain a registered IP Address? Problem Solving Upgrading Software File list similar to the following is displayed To back up the application file on your Switch, enter To back up the bootrom file on your Switch, enterIf the recycle-bin is empty the following is displayed Command Line Interface Switch Setup Via network port 4200G ping aaa.aaa.aaa.aaaTo install the new web management code, enter Type y when promptedTo install the new application code, enter To download the web management file, enterFollowing information is displayed Enter y to display the following messageBootrom Interface Followed by a password promptUpgrading from S3t03010024.zip 3comoscfg.def 3comoscfg.cfg s3t030100s56.app Enter your choice0-3 Select option 2 to display the following Select option 3 to display the followingBootrom UpgradingUsing Tftp Using FTPUsing XModem Ccccccccccccccccccccccccccccc Upgrading Software Safety Information Power Cord Set-Japan Important Safety Information This must be approved for the country where it is usedImportant Safety Information ’information de Sécurité Importante Schko Dispositif Laser De Classe Wichtige Sicherheitsinformationen Vorsicht Das Gerät muß geerdet seinInformación de Seguridad Importante Schuko Importanti Informazioni di Sicurezza Stati Uniti e Ważne informacje o zabezpieczeniach Ważne informacje o zabezpieczeniach Ostrzeżenie Porty światłowodowe-bezpieczeństwo PIN-OUTS Ethernet Port RJ-45 Pin Assignments 10/100 and 1000BASE-T RJ-45 connectionsPin Number 10/100 1000 Ethernet Port RJ-45 Pin Assignments Appendix B PIN-OUTS Switch 4200G 12-Port Switch 4200G 24-Port Switch 4200G 48-Port Appendix C Technical Specifications Product ServicesRegister Your PurchaseOnline Access SoftwareTroubleshoot DownloadsContact Us Country Telephone Number Latin America Telephone Technical Support and RepairUS and Canada Telephone Technical Support and Repair Index NumbersSFP Regulatory Notices