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LEDs
Table 1-3 Front-Panel LED Indicators
LED Name
Normal State Function
Power
On
Self Test
Off
Boot State
Off
Data Received
Flashing
Packet Received Flashing
Network Activity Flashing
Reset Switch
®
Reset
switch
Self
Power
Test
Figure 1-3 Front Panel of Model CS/3100
The six front-panel LED indicators display diagnostic and operational activity
at power-on and while communications server software is running.
Table 1-3 lists these front-panel LED indicators and their functions.
On when server is on and the power supply generates voltage on its +5 V DC output.
On for approximately two minutes following power-on or reset. Stays on if diagnostic
tests fail. Flashes during operation to indicate no boot source or software failure.
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.
Flashes when the server detects data being received from an I/O port. Used to verify
proper physical attachment of I/O devices.
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.
Flashes when the server detects a packet on the network. The packet address need
not match the server's address. Verifies proper physical attachment to the network
cable and indicates network load.
The reset switch is located at the lower left corner of the front panel. It is
recessed to protect it from being pressed unintentionally. Pressing the reset
switch interrupts normal operation, reinitializes the server, begins the
startup sequence, and purges server RAM in the same way as toggling the
power switch. The Self Test LED lights as the server executes self-test
diagnostics. The Boot State LED lights as the server boots from its software
diskette or the network.
CS/3100
Data
Boot
Packet
Received
State
Received
LEDs
Front Panel
Network
3.5" diskette drive
Activity
(Model CS/3100 only)
1-7
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