FDDI/DX
Selftest
Normal mode selftests run at powerup when the DIAG/NORM
switch is in the NORM position. Attach a terminal set for 9600
baud, 8 data bits, no parity, and 1 stop bit to the serial port to
monitor normal mode selftest output.
Extended Selftests
Extended selftests are run with the DIAG/NORM switch in the
DIAG position. Attach a terminal set for 9600 baud, 8 data bits, no
parity, and 1 stop bit to the serial port, and attach loopback cables
between ports FDDI-A and FDDI-B. Enter s to enable the extended
selftests. Enter a to display the Diagnostic Engineering Monitor
(DEMON) menu.
LEDs
LEDs indicate the status of the FDDI PCB and the network during
operation.
LEDs 4, 1, and 0 indicate connection status for port FDDI-A.
LEDs 4, 3, and 2 indicate connection status for port FDDI-B.
LED 4, RINGOP, is ON when the ring is not operational.
LED 5, PACKETIO, changes state each time a packet is
received or successfully transmitted. LEDs 6 and 7 blink
alternately four times per second under normal conditions.
LEDs 6 and 7 blink together two times per second when a
non-recoverable firmware problem occurs.
LED Patterns During Selftests
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