3Com CS/2500 manual Its +5 V DC output

1-6 CHAPTER 1: OVERVIEW

	3Com			CS/2600
Reset
switch
Power	Self	Boot	Data	Packet	Network	3.5"	diskette drive
	Test	State	Received	Received	Activity
		LED indicators

Figure 1-4 CS/2600 Front Panel

LEDs The six front-panel LED indicators display operational and diagnostic activity at power-on and while communications server software is running. Table 1-3 lists these front-panel LED indicators and their functions.

Table 1-3 Front-Panel LED Indicators

LED Name	Normal State	Function
Power	On	On if server is turned on and the power supply generates voltage on
		its +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 to
		indicate no boot source or software failure.
Boot State	Off	On during software boot; turns off if boot is successful. Lights
		cyclically 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/O
		port. Used to verify proper physical attachment of I/O devices.
Packet Received	Flashing	Flashes when the server detects a packet on the network with
		address field matching the server’s address. Verifies that packets
		are being received by the server.
Network	Flashing	Flashes when the server detects a packet on the network. The
Activity		packet address need not match the server’s address. Verifies proper
		physical attachment to the network cable and indicates network
		load.