3Com RMON-EMP-3 RS-232 Null-Modem Cable, Figure A-3. RS-232 Straight-Through Cable Pinouts

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RS-232 Null-Modem Cable

Figure A-3 represents the minimum pinouts required for an RS-232 null-modem cable. The terminal end of the cable is a 25-pin female connector. The RMON MultiProbe Module end of the cable is a 25-pin female connector.

Figure A-3. RS-232 Straight-Through Cable Pinouts

Specifications A - 11

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Contents Page VDE Class B Compliance Restricted Rights Page Contents Configuring the Module Troubleshooting Page Figures Page Tables Page Audience How to Use This GuideStructure of This Guide Usr/snm/agents Document ConventionsConvention Indicates Example Related Documents 3Com Documents Reference Documents Introduction Rmon Probe Rmon OverviewRmon Architecture Rmon Client Ethernet Rmon GroupsPage Rmon MultiProbe Module Overview Rmon MultiProbe Module Features Other benefits of the Rmon MultiProbe Module include Theory of Operation Rmon Sample Application Sample ApplicationPage Installing the Module Precautionary Procedures Step Procedure Chapter/Section Quick InstallationQuick Installation Steps Unpacking Procedures Installing the Rmon MultiProbe Module Rmon MultiProbe Module ONline System Concentrator Connecting a Terminal Initializing the Rmon MultiProbe Module Main Configuration Menu Monitoring the Front Panel Rmon MultiProbe Module Front Panel LEDs and Reset Button LED Name Color State Indicates Module LED InterpretationsModule LED Interpretations Page Configuring the Module Configuration Menu Overview Configuration Menu Flow Chart Configuration Menu Flow Chart Modifying Configuration Menu Values Using the Main Configuration Menu Main Configuration Menu Option Result Main Configuration Menu DescriptionDownload Menu Using the Download MenuDownload Menu Description Modify/View Configuration Values Menu Using the Modify/View Configuration Values MenuModify/View Configuration Values Menu Description Using the Modify/View Serial Configuration Values Menu Modify/View Serial Configuration Values Menu Modify/View Serial Configuration Values Menu Description Display the modem init string and enables you Modem Init Strings and Hangup Strings Command ResultModem Init Strings and Hangup Strings Waits for the reply string that follows which is Response code Bps rate Modem Response StringsConnect Response String Example No Carrier /BUSY/NO DIALTONE/NO ANSWER/ERROR Using the Modify/View Network Settings MenuModify/View Network Settings Menu Modify/View Network Settings Menu Description Using the Modify/View Network Interface Settings Menus Modify/View Network Interface 1 Settings Menu Modify/View Network Interface Settings Menu Description Assigning the Interface IP Address and Subnet Mask Configuring the Module and InterfacesConfiguring the Module 3 Assigning the Module Default Gateway Bootp Configuration Process Using Bootp to Configure the Module and InterfacesBootp Description Sample BOOTPtab file Bootp RequirementsUsing Bootp Configuring the Module 3 Assigning Interfaces to Networks DIP Switch Location Using the DIP Switch to Assign NetworksSwitch Network Selection Setting Network Selection DIP Switch SettingsUsing Management Commands to Assign Interfaces to Networks SET Port 7.1 Network ETHERNET1 Management Command ExamplesSaving Network Assignments Showing Module and Interface ConfigurationsShow Module Command Show Port Command Backplane Re-initializing the Rmon MultiProbe Module Information Preserved Information Lost Warm-Starting the Rmon MultiProbe ModuleCold-Starting the Rmon MultiProbe Module Information Preserved Information Lost Page Troubleshooting Diagnostic Interface Troubleshooting Startup ProblemsDiagnostic Tests and Interface Status LEDs Symptom Possible Cause Corrective Action Troubleshooting MalfunctionsTroubleshooting Malfunctions Troubleshooting Malfunctions Troubleshooting Malfunctions If the LEDs Nvram Troubleshooting Network Connectivity Problems Technical Assistance Page Specifications Environmental Specifications Electrical SpecificationsGeneral Specifications Mechanical SpecificationsInterface Configuration Connectors and CablesPin RS-232 25-Pin Port Connector PinoutsRS-232 Crossover Cable for a PC or Terminal Sample Out-of-Band Connections Modem Cable PinoutsPage Using the Rmon MultiProbe Module Slip Address Modem MultiProbe Module RS-232 Straight-Through CableTable A-2. RS-232 Straight-Through Cable Pinouts Figure A-3. RS-232 Straight-Through Cable Pinouts RS-232 Null-Modem CableEthernet Table Maximum Number of Entries Memory Configuration AllocationTable A-3. Maximum Number of Entries for Ethernet Tables On-line Technical Support Technical SupportWorld Wide Web Site Support from Your Network SupplierEmail Technical Support Support from 3Com Returning Products for Repair Accessing the 3Com MIB3Com Technical Publications Page Index LEDs, 2-11 monitoring, 2-10 reset button ONcore Distributed Management Module Pinouts, A-5 speed, 3-15 Serial Port Mode VDE compliance Warm start Configuration information