PC-AT Serial Cable, RJ-45 to 9-pin | 3Com 3CR17451-91, 3CR17450-91

B PIN-OUTS

Null Modem Cable RJ-45 to RS-232 25-pin

Switch 3870	PC/Terminal
Cable connector: RJ-45 female	Cable connector: 25-pin male/female

Screen Shell

TxD 3

RxD 2

Ground 5

RTS 7

CTS 8

DSR 6

DCD 1

DTR 4

1 Screen

3 RxD

2 TxD

7 Ground

4 RTS

20 DTR

5CTS

6DSR

8DCD

only required if screen

always required

required for handshake

PC-AT Serial Cable	RJ-45 to 9-pin
	Switch 3870	PC-AT Serial Port
	Cable connector: RJ-45 female	Cable connector: 9-pin female

Screen	Shell	Shell	Screen
DTR	4	1	DCD
TxD	3	2	RxD
RxD	2	3	TxD
CTS	8	4	DTR
Ground	5	5	Ground
DSR	6	6	DSR
RTS	7	7	RTS
DCD	1	8	CTS

only required if screen

Required for handshake

Always required

required for handshake

always required

required for handshake

Image 71

3Com 3CR17451-91, 3CR17450-91 manual PC-AT Serial Cable, Null Modem Cable RJ-45 to RS-232 25-pin, RJ-45 to 9-pin

Contents

SuperStack 3 Switch 3870 Family Getting Started Guide United States Government Legend 3Com Corporation Campus Drive Marlborough MA USA Contents Setting UP for Management PIN-OUTS Page About this Guide Convention Description ConventionsIcon Description Documentation documentation RelatedDocumentation Comments To access the online documentation from the CD-ROM 3870 Switch Hardware Features Switch Front View Detail Switch 1000BASE-T Ports Stack Master LED Color Indicates Port Status/Packet LEDsStacking Status LED Unit LED Power/Self Test LEDFault LED Color Indicates Module LEDs View Detail Port Speed Feature Switch Port StatusDuplex Mode Type of Unit Total Units in the Stack Maximum Modules Port Default Settings Introducing the Superstack 3 Switch Installing the Switch Site Package ContentsChoosing a Suitable Rack-mounting Power lines and fluorescent lighting fixturesTo rack-mount your Switch Switch, as shown in Figure Fitting a bracket for rack-mounting Repeat steps 2 and 3 for the other side of the Switch Sequence Power-upPowered-up and ready for operation Switch Cross-over Cable Straight-through Cable Power System output SFP Operation Remove the plastic protective cover if fitted Removing an SFP Your SwitchTransceiver Installing the Switch Setting UP for Management Overview Setting Up Automatic IP Configuration Manual IP Configuration Setting UP for Management Pre-requisites Manually Configuring IP Information Setting Up the Switch with IP Information Connecting the Workstation to the Switch Example top-level command line interface menu Automatically Configured IPViewing Viewing Automatically Configured IP Information Viewing IP Information via the Console Port Refer to Setting Up Command Line Interface Management on Management Command LineInterface Management Web Interface Where xxx.xxx.xxx.xxx is the IP address of the Switch Network Using Telnet Over the Network Setting Up WebInterface Choosing a Browser Passwords Setting Up SnmpDefault Users Security Device User Modify operation on the web interface User Default Access Level Name Password Problem Solving Indicated by LEDs Solving ProblemsPower/Self Test LED does not light On powering-up, the Power/Self Test LED remains yellow Port Status LED is flashing green/yellow ProblemsRefer to the list of suggested solutions below Solving Hardware Unit fails or Snmp thermal shutdown trap is received Fan failure warning message is received IP Addressing Solving Communication ProblemsError message indicating that the SFP transceiver is faulty 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 Information Important Safety Information Class ’information de Sécurité Importante ’information de Sécurité Importante Dispositif Laser De Classe Vorsicht Europe Wichtige Sicherheitsinformationen Laser Gerät der Klasse Información de seguridad importante Schuko Appendix a Safety Information CSA Importanti Informazioni di Sicurezza Solo Regno Ważne informacje o zabezpieczeniach Appendix a Safety Information Laser Produkt Klasa Appendix a Safety Information RJ-45 to 9-pin PC-AT Serial CableNull Modem Cable RJ-45 to RS-232 25-pin Pin Number 10/100 1000 Modem CableRJ-45 Pin Assignments RJ-45 to RS-232 25-pin Pin Number 10/100 1000 Appendix B PIN-OUTS Switch 3870 24 Port Switch 3870 48 Port Purchase Product to Gain Service BenefitsServices Register Your Telephone Technical Access SoftwareDownloads Contact Us Australia 800 678 Philippines US and Canada Telephone Technical Support and Repair Index SFP Page Chapter Index Regulatory Notices