3Com 3C16987 manual Modem Cable, RJ45 Pin, Assignments, Connectors, Pin Number Signal Function

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42APPENDIX B: PIN-OUTS

Modem Cable	9-pin to RS-232 25-pin
	Switch 3300 SM		RS-232 Modem Port
	Cable connector: 9-pin 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

RJ45 Pin	Pin assignments are identical for 10BASE-T and 100BASE-TX RJ45
Assignments	connectors
	Table 7 Pin assignments

Pin Number	Signal	Function

Ports configured as MDI
1	TxData +	Transmit data
2	TxData –	Transmit data
3	RxData +	Receive Data
4	Not assigned
5	Not assigned
6	RxData –	Receive data
7	Not assigned
8	Not assigned

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Contents User Guide 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents PIN-OUTS Support from 3Com Returning Products for Repair Page About this Guide Conventions Icon DescriptionConvention Description Related DocumentationComments YearCompliance ProductIntroducing the Switch 3300 SM About SuperStack Switch 3300 SM Summary of FeaturesSwitch 3300 SM Front View Detail 10BASE-T / 100BASE-TX PortsPower/Self Test LED Color Indicates Port Status LEDsUnit LEDs Switch 3300 SM Rear View Detail Power SocketUnits on Network ConfigurationSwitch 3300 SM as a ExamplesSwitch Using the Switch as a collapsed backboneSwitch Fast Ethernet configuration rules Configuration Rules with Full Duplex Configuration Rules for Gigabit Ethernet Installing the Switch Rack-mounting Repeat steps 2 and 3 for the other side of the Switch Fitting a bracket for rack mountingStacking Units Treated as a single manageable unit with one IP address3C16965. Contact your supplier for details You need only one SuperStack II Switch 3300 MM per stack Stack of three units Switch 3300 SM Power-upPowered-up and ready for operation SequencePort, you need a cross-overcable. Most of the 10BASE-T ChoosingCorrect Cables Color StateProblem Managing SwitchNetwork. For information on managing the Switch using GuideSafety Information Important Safety InformationPersonnel only Important Safety Information Personnel qualifié ’information deSécurité Importante Plus étroites’information de Sécurité Importante Wichtige Sicherheitsinformat ionen Warnhinweis Faseroptikanschlüsse Optische Sicherheit Appendix a Safety Information PC-AT Serial Cable PIN-OUTSNull Modem Cable Pin to RS-232 25-pinModem Cable ConnectorsPin Number Signal Function RJ45 PinPin Number Signal Function Appendix B PIN-OUTS Technical Specifications Vlan MIB RFC Technical Support ServicesServices Online TechnicalUsername anonymous 408 727Europe, South Africa, and Middle East Country Telephone Number Asia, Pacific RimCountry Telephone Number Fax Number Glossary Endstation BroadcastCollision EthernetLine speed See baud Protocol LoopMulticast RepeaterSTP See Spanning Tree Protocol STP Glossary Index Index 3Com Corporation Limited Warranty Included Services Limitation of Liability EMC Statements