PictureTel III ISA manual Running the Group 2 Test, Follow these steps to run the Group 1 tests

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Diagnostic Testing Under Windows 3.x

6-3

Follow these steps to run the Group 1 tests:

1From the Test menu, select Run Tests and press Enter. The Run Tests dialog box appears with the Start button already selected.

2Press Enter to start the tests.

Group 1 tests run 10 times (default setting) unless you specify otherwise. The test results are displayed in the Results column.

Running the Group 2 Test

The Group 2 test is the Network Loopback Test. It tests whether the 3C509B-COMBO and 3C509B-TPC NICs can transmit and receive data over thin Ethernet coaxial wire. This test requires either installing a loopback plug at the transceiver connection on the NIC or running the test on an idle network.

A failure in this test usually indicates a cabling problem.

CAUTION: Running the Group 2 test while connected to an active network can cause intermittent failures.

Assembling a Loopback Plug

If you do not have a loopback plug, you can order one from your authorized network supplier or you can make your own. You can purchase the terminators from your network supplier (3Com part number 3C535).

To assemble the loopback plug, connect two 50-ohm network cable terminators to a T connector, as shown in Figure 6-1.

T connector

50Ω Terminator

50Ω Terminator

Figure 6-1Assembling a Loopback Plug

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Contents EtherLink III ISA Network Interface Card User Guide 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Lifetime Limited Warranty Sweden, Finland, Norway Contents To Not Save Installation Settings To Conﬁgure Dynamic Access SoftwareRunning the AutoLink Install Program To Obtain an IP Address AutomaticallyPerforming Automated Installations NIC Test Network Test Uninstalling the NICInstalling from a Diskette ChecklistLow-Priority Ratio Natural Packet Interval Disable Receive Packet BufferingTroubleshooting Hubs with Crossover Cable C-1 DNS Conﬁguration Screen Update Device Driver Wizard ScreenSelect Device Screen Save Installation Settings Screen Diagnostic Programs Option SettingsTables Parameters for 3C509B NIC ModelsPage If you are looking for Turn to How to Use This GuideAbout this Guide List conventions that are used throughout this guide ConventionsIcon Alerts you to Convention DescriptionNetwork Interface Card Overview Network Interface Card InstallationBefore You Begin NIC Model Cable Connector Transceiver Network Segment3Com 3C509B EtherDisk diskettes 1 MaximumInstalling the NIC 2Installing the 3C509B NIC Go to Link LED later in this chapter Connecting to the Network4Connecting to the BNC Port on the 3C509B-TPC NIC Link LED If the NIC LED indicates a problem, check the followingGo to the next section Describes the LED statesPage Express Installation Setup for Custom InstallationSelecting the Type of Installation Custom Installation Windows 95 SetupFuture installations Multiple NIC Installations3Com Installation Wizard Windows 95 SetupClick OK Performing the Preinstallation ProcedureFollow these steps to perform the preinstallation procedure Conﬁguring the NIC in a Plug and Play PC Turn the power on and boot WindowsClick Finish 3Com Installation Wizard starts. Go to ChapterInsert EtherDisk diskette 1 in drive a Click Next Disabling Plug and Play on the NIC Plug and Play is disabled on the NICDOS Pnpdsabl screen appears, as shown in Figure Next step is to conﬁgure the NICSelect No, and then click Next Conﬁguring the NICAdd New Hardware Wizard starts and displays the ﬁrst screen 8Install from Disk Screen 10I/O Range Assigned to the NIC Screen Windows NT SetupWindows NT Setup Select OEM Option screen appears Network screen appearsFollow these steps to perform a Custom installation Custom InstallationConﬁguring the NIC To Accept Conﬁguration SettingsTo Modify Conﬁguration Settings Testing the NIC and the Network ConnectionMessage conﬁrms that the NIC is functioning correctly Follow these steps to test the NICNetwork Connection Test screen appears, as shown in Figure Follow these steps to test the network connectionTo Not Install TCP/IP Installing TCP/IP Under WindowsTo Install TCP/IP Select the No radio button Click NextTo Obtain an IP Address Automatically Conﬁguring TCP/IP Under WindowsFollow these steps to obtain an IP address automatically Go to Conﬁguring DNS later in this chapterClick Add New Gateway to add the new gateway conﬁguration To Specify an IP Address ManuallyTo Obtain a DNS Address Automatically Conﬁguring DNSFollow these steps to obtain a DNS address automatically Message conﬁrms that the DNS connection is functioningFollow these steps to specify a DNS address manually To Specify a DNS Address ManuallyNew server appears in the Servers list box Next step is to identify your PC on the networkIdentifying Your PC on the Network Next step is to conﬁgure DynamicAccess softwareFollow these steps to enter ﬁeld data Type the name of your computerTo Not Conﬁgure DynamicAccess Software Conﬁguring DynamicAccess SoftwareDouble-click the 3Com Pace Conﬁg icon shown in Figure To Conﬁgure DynamicAccess SoftwarePace Support Setup screen appears, as shown in Figure To Not Save Installation Settings Repeating a Previous InstallationSelect the Yes radio button, and then click Next To Save Installation SettingsClick Finish Installation Complete screen appears, as shown in FigureClick Yes Completing the Installation and ConﬁgurationWindows Click Close Windows NT19Microsoft TCP/IP Properties Screen Choose a method to conﬁgure TCP/IPSelect the Specify an IP address radio button Page Running the AutoLink Install Program ConfigurationUnder Windows AutoLink RequirementsI N N U AutoLink program menu is displayedObtaining NetWare Loadable Modules Installing Other Supported Network DriversNetWare Server NLM Name Network Text File Name Network Driver Name Operating SystemNIC software is removed from your PC Removing NIC SoftwareSelect Conﬁgure NIC and press Enter NIC Conﬁguration screen is displayed, as shown in FigureSelect Auto Conﬁgure and press Enter Reconﬁguring the NICFollow these steps to conﬁgure the 3C509B ISA NIC for an Changing NIC Conﬁguration from ISA to EisaChanging NIC Conﬁguration from Eisa to ISA Option Default Setting Supported Settings Changing Conﬁguration SettingsFollow these steps to change the conﬁguration settings Page Resolving Hardware Conﬂicts in Windows 95 and Windows NT Windows 95 Windows NT TroubleshootingChecklist Close all open windows and restart the PC System Properties window is displayedRestart the PC General tab of the 3Com NIC Diagnostics program appearsDouble-click the 3Com icon in the taskbar tray Installing the First NIC Installing Multiple NICs in a Windows NT PCSetup program copies ﬁles, and the Network screen reappears 3Com EtherLink III 3C509 ISA Adapter Bus screen appearsSetup program displays a warning message Installing Subsequent NICsMicrosoft TCP/IP Properties screen appears Files are copied, and the Network screen reappearsDiagnostic Testing Under Windows 95 and Windows NT Windows 95 and Windows NT TroubleshootingStarting the 3Com NIC Diagnostics Program Messages are displayed, and you are prompted to rebootDynamicAccess DiagnosticsTab Description General ConﬁgurationRunning Tests Uninstalling the NICClick Remove Click OK Reinstalling NIC SoftwareInstalling from the Hard Disk Performing Automated InstallationsInstalling from a Diskette Click InstallDiagnostic Testing Under Windows Windows TroubleshootingIf multiple NICs are installed, each NIC is listed Starting the DOS Conﬁguration and Diagnostic ProgramRunning the Group 1 Tests Select the NIC you want to test and press EnterRunning the Group 2 Test Failure in this test usually indicates a cabling problemFollow these steps to run the Group 1 tests Assembling a Loopback PlugFollow these steps to set up an echo server Setting Up an Echo ServerRunning the Group 3 Test Starting the Group 2 TestStarting the Group 3 Test Main window of the diagnostic program is displayedDiagnostic NIC Installed Program Name Echo Server Getting Help If a Test Fails NIC Speciﬁcations SpecificationsPin Function RJ-45 Connector Pin AssignmentsAUI Connector Pin Assignments TypeExample Cable SpeciﬁcationsPage Additional Ranges tab is shown in Figure B-1 Additional Ranges TabClick Add Advanced Options TabConcurrent UDP Streams Fifo Packet ThresholdLow-Priority Ratio Natural Packet IntervalThis option disables the receive packet buffer Disable Switch Packet PrioritizationDisable Receive Packet Buffering Crossover Cable Troubleshooting Hubs with Crossover CableFigure C-1Straight-Through and Crossover Cable Pinouts To make a crossover cable, connect TD+ to RD+ and TD- to RDWorld Wide Web Site Online Technical Services3Com Bulletin Board Service Access by Analog Modem 3ComFacts Automated Fax ServiceAccess by Digital Modem 408 654Support from Your Network Supplier 3ComForum on CompuServe Online ServiceTo use 3ComForum Log on to CompuServeRegional Sales Office Telephone Number 3Com Corporation Support from 3Com3Com Ireland Country Telephone Number Fax Number Returning Products for RepairTo obtain an RMA number, call or fax Numbers IndexIndex NIC Page 3Com Corporation Limited Warranty FCC Class B Statement FCC Declaration of Conformity Page Page Page Page Page