3Com CS/2500 Installation Manual

Contents

1-6 CHAPTER 1: O VERVIEWFigure 1-4 CS/2600 Front PanelLEDs The six front-panel LED indicators display operational and diagnosticactivity at power-on and while communications server software isrunning. Table 1-3 lists these front-panel LED indicators and theirfunctions.3.5" diskette drive3ComCS/2600LED indicatorsResetswitchNetworkActivityDataReceivedBootStateSelfTestPower PacketReceivedTable 1-3 Front-Panel LED IndicatorsLED Name Normal State FunctionPower On On if server is turned on and the power supply generates voltage onits +5 V DC output.Self Test Off On for approximately two minutes following power-on or reset.Remains on if diagnostic tests fail. Flashes during operation toindicate no boot source or software failure.Boot State Off On during software boot; turns off if boot is successful. Lightscyclically or remains on if boot source is not present or responding.Also indicates hardware failure during operation.(continued)Data Received Flashing Flashes when the server detects data being received from an I/Oport. Used to verify proper physical attachment of I/O devices.Packet Received Flashing Flashes when the server detects a packet on the network withaddress field matching the server’s address. Verifies that packetsare being received by the server.NetworkActivityFlashing Flashes when the server detects a packet on the network. Thepacket address need not match the server’s address. Verifies properphysical attachment to the network cable and indicates networkload.CS2500BookFile : Overview Page 6 Thursday, December 11, 1997 10:44 AM