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3Com 2250-SFP, 2226-SFP, 2426-PWR manual Null Modem Cable, PC-AT Serial Cable

Models: 2426-PWR 2250-SFP 2226-SFP

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88APPENDIX C: PIN-OUTS

Null Modem Cable

RJ-45 to RS-232 25-pin

		PC/Terminal
Cable connector: RJ-45 female		Cable connector: 25-pin male/female
Screen	Shell	1	Screen	only required if screen
Screen	Shell	1	Screen
TxD	3	3	RxD
RxD	2	2	TxD	always required
Ground	5	7	Ground
RTS	7	4	RTS
CTS	8	20	DTR
DSR	6	5	CTS	required for handshake
DCD	1	6	DSR
DTR	4	8	DCD

PC-AT Serial Cable

RJ-45 to 9-pin

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

Modem Cable

RJ-45 to RS-232 25-pin

		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

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 88

3Com 2250-SFP, 2226-SFP, 2426-PWR manual Null Modem Cable, PC-AT Serial Cable

Contents

Installation and User Guide 3Com Corporation 350 Campus Drive Marlborough MA Contents Snmp 3COM CLI Reference Guide Page About this Guide ConventionsDocumentation Comments Product RegistrationOverview of the Baseline Switch Features and CapabilitiesAutosensing of MDI/MDIX Connections Autonegotiating 10/100 Mbps PortsPower-over-Ethernet Capability Physical FeaturesGigabit Combo Ports RJ-45/SFP Front Panel RJ-45 10/100 PortsGigabit Combo Ports RJ-45/SFP 10/100BASE-TX Link/Activity Status LEDs SFP Mode Power LED Rear PanelPackage Contents Installing the Switch Important Safety InformationPositioning the Switch Importante Avviso di SicurezzaUsing the Mounting Kit Rack-Mounting or Free-StandingMontagesatz Anweisungen Supplying Power to the SwitchPlacing Units On Top of Each Other Checking for Correct Operation Status MeaningApproved SFP Transceivers Using SFP TranceiversInserting an SFP Transceiver Performing Spot Checks Removing an SFP TransceiverRefer to Troubleshooting on Requirements for Accessing the Web Interface Using the Console Command Line Interface CLICLI Summary with Default IP Address Logging On to the Web Interface CLI Summary with Assigned IP AddressNavigating the Web Interface MenuMenu Item Description Snmp Buttons Port StatusRunning the 3Com Switch Detect Application 3Com Switch Detect Welcome Screen3Com Switch Detect Search Screen Connecting to the WEB Interface Configuration Overview Device Summary InformationDevice View Polling IntervalAdministration Settings Modifying the IP Address SettingsAutomatic IP Configuration Color KeyIP Setup Backup ConfigurationRestore Configuration Firmware UpgradeReset System AccessReboot Initialize, keep IP settingUser Summary Create UserModify User Remove UserSystem Name SetupSystem Time Snmp Add Configuring VLANsSnmp Remove Vlan Setup Screen Modify VlanModify Port RenameRemove Port DetailForwarding Tagged/Untagged Frames Sample Vlan ConfigurationsVlan Detail Setting Up Two VLANs on the Same Switch Setting Up Vlan Across Two SwitchesTagged Vlan Configuration Spanning TreeSummary Spanning Tree Summary ScreenPort Setup Spanning Tree Setup ScreenSpanning Tree Port Setup Screen Igmp Snooping & QueryBroadcast Storm Broadcast Storm Summary ScreenQoS VoIP Traffic Settings ModifyQoS VoIP Setup Screen OUI Summary OUI AddPoE 3CBLSF26-PWR only QoS OUI Modify ScreenConfiguring Port Settings AdministrationPort Administration Summary Screen DetailPort Administration Setup Screen Speed/Duplex for 1000 Mbps ConnectionsLink Aggregation Guidelines for Creating TrunksCreate Link Aggregation Summary ScreenUse the Remove tab to delete a link aggregation group Statistics SecurityRadius Client 802.1X Settings Configure802.1X Summary Screen Monitoring Address TablePort Mirroring Port SummaryUse the Setup tab to create a port mirror session Cable Diagnostics Cable Diagnostic Summary ScreenDiagnostics Cable Diagnostic ScreenConfiguring the Switch from the WEB Interface Troubleshooting Resetting to Factory DefaultsForgotten Static IP Address Solving LED IssuesFiber cable is connected, but the Module Active LED is off Link/Activity LED is on, but network performance is poor If the Problem PersistsAll ports appear to show continual activity Troubleshooting Troubleshoot Online Access Software Downloads Purchase Value-Added ServicesRegister Your Product Telephone Technical Support and Repair Contact UsCountry Telephone Number Latsupportanc@3com.com 3CBLSF26 Related Standards EnvironmentalPhysical Electrical3CBLSF26PWR Related Standards 3CBLSF50 Related Standards EnvironmentalPhysical ElectricalAppendix B Technical Information PIN-OUTS Console CablePC-AT Serial Cable Null Modem CableModem Cable Ethernet Port RJ-45 Pin Assignments Pin Number 10/100 1000Appendix C PIN-OUTS Console Port Getting Started with the Command Line InterfaceLogging on to the CLI Automatic Logout CLI CommandsConcurrent CLI Sessions Syntax Default Configuration Ping ParametersIpSetup 255.255.255.0Upgrade Following example resets the Switch to factory defaults InitializePassword LogoutRegulatory Notices 100 Auto-negotiation 1000BASE-TBandwidth Category 3 Cables Category 5 CablesCategory 5e Cables Category 6 CablesFull Duplex Half DuplexIeee 802.1D Ieee 802.1QPower over Ethernet LayerLink Aggregation MAC AddressSwitch ServerSubnet Address Subnet MaskVlan Index NumbersIndex