3Com 4210 PWR 26-PORT, 4210 PWR 18-PORT manual Ethernet Port RJ-45 Pin Assignments, Pin assignments

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58CHAPTER A: PIN-OUTS

Modem Cable	RJ-45 to RS-232 25-pin
	Cable connector: RJ-45 female		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	RTS
	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−
3	Transmit Data +	Bidirectional Data A+
4	Not assigned	Bidirectional Data A−
5	Not assigned	Bidirectional Data D+
6	Transmit Data −	Bidirectional Data D−
7	Not assigned	Bidirectional Data C+
8	Not assigned	Bidirectional Data C−

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Contents 3Com Switch 4210 Family 3Com Corporation Campus Drive Marlborough, MA USA United States Government LegendContents Obtaining Support for Your 3COM Products Regulatory NoticesAbout this Guide Related Documentation Product Introduction Wire-speed Layer 2 switchingDescription of their features OverviewIntroduction to Switch 4210 Family PWR Switches Switch 4210 9-port PWR Front panelSide panel Power systemRear panel Cooling systemFront panel of a Switch 4210 18-port PWR Shows the front panel of the Switch 4210 26-port PWR model AC input Switch 4210 26-port PWR units support AC input or DC inputDC input-Rated voltage range -52 VDC to -56 VDC 10/100BASE-TX Autosensing Ethernet Port Status LED Power LEDFront Panel LEDs Mbps Uplink Port Status LEDSwitch 4210 9-port Front panel Introduction to the Switch 4210 Family Non-PWR ModelsThis section describes each Switch 4210 Family model Panel StatusSwitch 4210 cools off naturally Switch 4210 18-port Front panelSwitch 4210 26-port Front panel Switch 4210 18-port model’s rear panelSwitch 4210 52-port Front Panel Switch 4210 26-port rear panelDescribes the 10/100Base-TX autosensing port’s Link/Act LED Port LEDDescribes the Speed LED on the 10/100Base-TX port Technical specifications for the Switch Technical SpecificationsSwitch Model Port PWR Technical specifications for the Switch 4210 PWR models Earthing LeadSFP Modules SwitchSFP modules supported by the Switch Supported forProduct Introduction Installing the Switch Installing the Switch Installing the switch in a 19-inch rack Mount the front bracket to the device Screw FrontInstallation completed Ready for operation Power-upSequence 421052 for a list of suggested solutions Connecting aRedundant Power Supply PWR LED ColorsSystem Rectifiers No Rectifier Power AvailabilitySwitch 4210 Circuit Breaker and Cable Ratings Redundancy +1 RectifierUsing Power over Ethernet RPS Connection to the SwitchConsole Cable ConnectingRJ-45 Signal Direction DB9 console Terminal, as shown in FigureGND RXD DSR CTS Installing the Switch Managing Your Switch User View Methods of Managing a SwitchSystem View Configured IP information Setting Up YourRefer to Setting Up Snmp Management on Need toConfiguring IP Manually SnmpAutomatically Configuring the IP Address using Dhcp Automatically Configured IPViewing InformationUser View Login You can manually configure the switch IP information by Manually Configuring IP InformationConnecting to Console Port Connecting the Workstation to the SwitchSetting Up the Switch with IP Information Once you have logged in you are automatically in User ViewPrerequisites Using the Web Interface Using Command Line Interface using Telnet Enter the system-viewcommand and EnterConsole Port Connection Where xxx.xxx.xxx.xxx is the IP address of the switchManagement Network TelnetSetting Up Web Setting Up CommandManagement using Line InterfaceNew community string up to 32 characters Setting Up SnmpString is private String to be removedDefault Users Default UsersPasswords User Default Name Password Access LevelProblem Solving Solving Problems Indicated by LEDsProblems Solving HardwareIP Addressing Solving Communication ProblemsError message indicating that the SFP transceiver is faulty How do you obtain a registered IP Address?Formation Problems Solving FabricProblem Solving PC-AT Serial Cable PIN-OUTSNull Modem Cable RJ-45 to RS-232 25-pin10/100 and 1000BASE-T RJ-45 connections Ethernet Port RJ-45 Pin AssignmentsPin assignments Obtaining Support for Your 3COM Products Telephone Technical Available for purchase from your 3Com resellerContact Us Support and RepairCountry Telephone Number Latin America Telephone Technical Support and Repair US and Canada Telephone Technical Support and RepairSupervisor 3COM Network Management3Com Network DirectorAppendix C 3COM Network Management Integration Kit with 3Com EnterpriseManagement Suite HP OpenViewAppendix C 3COM Network Management Safety Information Important Safety Information’information de Sécurité Importante Wichtige SicherheitsinformationenInformación de Seguridad Importante Appendix D Redundant Power Supply Safety Information Ważne informacje o zabezpieczeniach Importanti Informazioni di SicurezzaAppendix D Redundant Power Supply Safety Information How to identify and resolve radio-TV interference problems Regulatory NoticesAppendix D Redundant Power Supply Safety Information