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

Models: RMON-EMP-3

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RS-232 Null-Modem Cable

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

Contents

Software Version 3Com Corporation 118 Turnpike Road Southborough, MA ONline Ethernet RMON MultiProbe Module Installation and OperationGuide Document Number Printed March Model Number RMON-EMP-3VDE Class B Compliance ii Ethernet RMON MultiProbe Module Installation and Operation GuideFederal Communications Commission Notice Canadian Emissions RequirementsRestricted Rights Ethernet RMON MultiProbe Module Installation and Operation Guideiv Ethernet RMON MultiProbe Module Installation and Operation Guide Chapter 1 - Introduction ContentsHow to Use This Guide Chapter 2 - Installing the Modulevi Ethernet RMON MultiProbe Module Installation and Operation Guide Chapter 3 - Configuring the ModuleIndex Chapter 4 - TroubleshootingAppendix A - Specifications Appendix B - Technical Supportviii Ethernet RMON MultiProbe Module Installation and Operation Guide Figures x Ethernet RMON MultiProbe Module Installation and Operation Guide Tables xii Ethernet RMON MultiProbe Module Installation and Operation Guide Audience How to Use This GuideStructure of This Guide Example Document ConventionsConvention Indicatesxvi Ethernet RMON MultiProbe Module Installation and Operation Guide Related Documents3Com Documents The following documents supply related background information Reference Documents1 Introduction RMON Probe RMON OverviewRMON Architecture RMON Client Ethernet RMON GroupsHostTopN Group - Sorts stations by top traffic contributors. You can use this information to identify the most active hosts on a segment or the hosts producing the most errors RMON MultiProbe Module Overview RMON MultiProbe Module Features Other benefits of the RMON MultiProbe Module include Theory of Operation Figure 1-1. RMON Sample Application Sample ApplicationPage Installing the Module 2 2 Installing the ModulePrecautionary Procedures Table 2-1. Quick Installation Steps Quick InstallationUnpacking Procedures Installing the RMON MultiProbe Module RMON MultiProbe Module Figure 2-1. RMON MultiProbe Module in the ONline System ConcentratorConnecting a Terminal Initializing the RMON MultiProbe Module Figure 2-2. Main Configuration Menu Monitoring the Front Panel Figure 2-3. RMON MultiProbe Module Front Panel LEDs and Reset Button Table 2-2. Module LED Interpretations State Table 2-2. Module LED Interpretations ContinuedLED Name ColorPage Configuring the Module 3 3 Configuring the ModuleConfiguration Menu Overview Main Menu Figure 3-1. Configuration Menu Flow ChartFigure 3-1. Configuration Menu Flow Chart Continued Modifying Configuration Menu Values Using the Main Configuration Menu Figure 3-2. Main Configuration Menu Result Table 3-1. Main Configuration Menu DescriptionOption Figure 3-3. Download Menu Using the Download MenuTable 3-2. Download Menu Description enables you to enter a new value. The filename canDisplays the TFTP server IP address and enables you reset, the module reverts to the software containedFigure 3-4. Modify/View Configuration Values Menu Using the Modify/View Configuration Values MenuFor a description of this menu, refer to the section Table 3-3. Modify/View Configuration Values Menu DescriptionDisplays the time zone and enables you to enter a description of this menu, refer to the section UsingDescription Continued Using the Modify/View Serial Configuration Values MenuTable 3-3. Modify/View Configuration Values Menu Figure 3-5. Modify/View Serial Configuration Values Menu Serial Port IP Address Table 3-4. Modify/View Serial Configuration Values Menu Descriptionenables you to enter a new value. Valid values Menu Description Continued Table 3-4. Modify/View Serial Configuration ValuesDisplays the modem hangup string and enables Table 3-5. Modem Init Strings and Hangup Strings Modem Init Strings and Hangup StringsTable 3-5. Modem Init Strings and Hangup Strings Continued Table 3-6. Connect Response String Example Modem Response StringsUsing the Modify/View Network Settings Menu Figure 3-6. Modify/View Network Settings Menu Figure 3-6 is an example of the Modify/View Network Settings menuTable 3-7. Modify/View Network Settings Menu Description Table 3-7. Modify/View Network Settings Menu Description Continued Using the Modify/View Network Interface Settings MenusFigure 3-7. Modify/View Network Interface 1 Settings Menu Displays the interface subnet mask and enables you Table 3-8. Modify/View Network Interface Settings Menu DescriptionDisplays the interface IP addressand enables you to Assigning the Interface IP Address and Subnet Mask Configuring the Module and InterfacesThis configuration sets up one interface for each bridged segment Assigning the Module Default Gateway BOOTP Configuration Process Using BOOTP to Configure the Module and InterfacesBOOTP Description Sample BOOTPtab file BOOTP RequirementsUsing BOOTP # /etc/bootptab database for bootp server /etc/bootpd Assigning Interfaces to Networks Figure 3-8. DIP Switch Location Using the DIP Switch to Assign NetworksNetwork Selection Table 3-9. Network Selection DIP Switch SettingsSwitch SettingUsing Management Commands to Assign Interfaces to Networks Management Command Examples Saving Network Assignments Showing Module and Interface ConfigurationsShow Module Command Show Port Command Configuring the Module 3 Re-initializing the RMON MultiProbe Module Information Lost Warm-Starting the RMON MultiProbe ModuleInformation Preserved Cold-Starting the RMON MultiProbe Module Information Lost Information PreservedPage Troubleshooting 4 4 TroubleshootingTable 4-1. Diagnostic Tests and Interface Status LEDs Troubleshooting Startup ProblemsTable 4-2. Troubleshooting Malfunctions Troubleshooting MalfunctionsTable 4-2. Troubleshooting Malfunctions Continued Corrective Action Table 4-2. Troubleshooting Malfunctions ContinuedSymptom Possible CauseTable 4-2. Troubleshooting Malfunctions Continued Corrective Action Table 4-2. Troubleshooting Malfunctions ContinuedSymptom Possible CauseTroubleshooting Network Connectivity Problems Technical Assistance Page Connectors and Cables Memory Configuration Allocation A SpecificationsElectrical Specifications Environmental Specifications Mechanical Specifications General SpecificationsOperating Temperature Electrical SpecificationsEnvironmental Specifications Power RequirementsGeneral Specifications Mechanical SpecificationsConnectors and Cables Table A-1. RMON MultiProbe Module RS-232 25-Pin Port RS-232 25-Pin Port Connector PinoutsConnector Pinouts RS-232 Crossover Cable for a PC or Terminal Sample Out-of-Band Connections Modem Cable PinoutsEthernet Null-Modem Cable Direct SLIP Connection ONline System Modem ModemONline System Concentrator Straight-Through CableUsing the RMON MultiProbe Module SLIP Address Table A-2. RS-232 Straight-Through Cable Pinouts RS-232 Straight-Through CableFigure A-3. RS-232 Straight-Through Cable Pinouts RS-232 Null-Modem CableTable A-3. Maximum Number of Entries for Ethernet Tables Memory Configuration AllocationOn-line Technical Support B 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 Numerics Index2 Index Page 4 Index VDE compliance Warm start configuration information