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.
LED
4 |
LEDs
3 & 1 |
LEDs
2 & 0 |
LED STATUS |
| x |
Off |
Off |
Connection is dead |
| x |
Off |
On |
Connection sequence in progress |
| Off |
On |
Off |
Connection is complete and is part of token path |
| On |
On |
Off |
Connection is complete but there is no token |
| x |
On |
On |
Connection is too noisy |
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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