Meridian America Link/Customer Controlled Routing - Manual (Page 81)

Chapter 4: Meridian Link/CCR hardware 63
Meridian Link Release 5C/CCR Release 3C Installation and Upgrade Guide
There are eight light-emitting diodes (LEDs) and two switches on the
faceplate of the SBC card, as illustrated in Figure 17.
The LEDs show the following conditions:
¥ Fail indicator This red LED is continuously lit when a hardware or
software failure occurs on the SBC. It is normal for this indicator to
flash while diagnostics are being run (after power-on or during
rebooting).
¥ Status indicator This yellow LED is lit when the MC68040 Status
signal goes low. When steadily lit, the LED indicates that the processor
has stopped.
¥ Run indicator This green LED is lit when the microprocessor executes
a bus cycle. When applications are running, the LED is lit almost
continuously but flickers every few seconds.
¥ SCON indicator This green LED is always steadily lit to indicate that
the SBC card is the VME bus system controller.
¥ LAN indicator This green LED is lit when the LAN chip is the local
bus master.
¥ +12 V indicator This green LED is lit when power is available to the
transceiver interface.
¥ SCSI indicator This green LED is lit when the SCSI chip is the local
bus master.
¥ VME indicator This green LED is lit when the board is using the VME
bus, or when the board is accessed by the VME bus.
The switches perform the following functions:
¥ ABORT switch This switch, when pressed, stops program execution
and returns control to the debugger. Do not press this switch. If you
accidentally press it, all software operations will stop and you will be in
the firmware debugger. In this case, press the red
RESET switch
immediately to reboot the system. Software diagnostics during system
boot will attempt to repair possible file system damage caused by the
nonstandard shutdown.