3Com 3CR17451-91, 3CR17450-91 manual Pin Number 10/100 1000

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RJ-45 Pin Assignments 71

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 D+
5	Not assigned	Bidirectional Data D-
6	Transmit Data -	Bidirectional Data A-
7	Not assigned	Bidirectional Data C+
8	Not assigned	Bidirectional Data C-

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Contents SuperStack 3 Switch 3870 Family Getting Started Guide United States Government Legend 3Com Corporation Campus Drive Marlborough MA USAContents Setting UP for Management PIN-OUTS Page About this Guide Icon Description ConventionsConvention Description Documentation RelatedDocumentation documentation Comments To access the online documentation from the CD-ROM3870 SwitchHardware Features Switch Front View Detail Switch1000BASE-T Ports Stacking Status LED Color Indicates Port Status/Packet LEDsStack Master LED Fault LED Power/Self Test LEDColor Indicates Module LEDs Unit LEDView Detail Duplex Mode Feature Switch Port StatusType of Unit Total Units in the Stack Maximum Modules Port Port SpeedDefault Settings Introducing the Superstack 3 Switch Installing the Switch Choosing a Suitable Package ContentsSite To rack-mount your Switch Power lines and fluorescent lighting fixturesSwitch, as shown in Figure Rack-mountingFitting a bracket for rack-mounting Repeat steps 2 and 3 for the other side of the SwitchPowered-up and ready for operation Power-upSwitch SequenceCross-over Cable Straight-through Cable Power System outputSFP Operation Remove the plastic protective cover if fitted Transceiver Your SwitchRemoving an SFP Installing the Switch Setting UP for Management Overview Setting UpAutomatic IP Configuration Manual IP ConfigurationSetting UP for Management Pre-requisites Manually Configuring IP InformationSetting Up the Switch with IP Information Connecting the Workstation to the SwitchExample top-level command line interface menu Viewing Configured IPAutomatically Viewing Automatically Configured IP Information Viewing IP Information via the Console Port Refer to Setting Up Command Line Interface Management on Interface Management Command LineWeb Interface ManagementWhere xxx.xxx.xxx.xxx is the IP address of the Switch Network Using TelnetInterface Setting Up WebChoosing a Browser Over the NetworkDefault Users Setting Up SnmpPasswords Security Device User Modify operation on the web interface User Default Access Level Name PasswordProblem Solving Power/Self Test LED does not light Solving ProblemsOn powering-up, the Power/Self Test LED remains yellow Indicated by LEDsRefer to the list of suggested solutions below ProblemsSolving Hardware Port Status LED is flashing green/yellowUnit fails or Snmp thermal shutdown trap is received Fan failure warning message is receivedError message indicating that the SFP transceiver is faulty Solving Communication ProblemsIP Addressing How do you obtain a registered IP Address? Solving Software Upgrade Problems Problem Solving Safety Information This must be approved for the country where it is used Power Cord Set Japan Important Safety InformationImportant Safety Information Class ’information de Sécurité Importante’information de Sécurité Importante Dispositif Laser De Classe Vorsicht Europe Wichtige SicherheitsinformationenLaser Gerät der Klasse Información de seguridad importanteSchuko Appendix a Safety Information CSA Importanti Informazioni di SicurezzaSolo Regno Ważne informacje o zabezpieczeniach Appendix a Safety Information Laser Produkt Klasa Appendix a Safety Information Null Modem Cable RJ-45 to RS-232 25-pin PC-AT Serial CableRJ-45 to 9-pin RJ-45 Pin Assignments Modem CableRJ-45 to RS-232 25-pin Pin Number 10/100 1000Pin Number 10/100 1000 Appendix B PIN-OUTS Switch 3870 24 Port Switch 3870 48 Port Services Product to Gain Service BenefitsRegister Your PurchaseDownloads Access SoftwareContact Us Telephone TechnicalAustralia 800 678 Philippines US and Canada Telephone Technical Support and Repair Index SFP Page Chapter Index Regulatory Notices