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A.11 MIS, Maintenance Interface System, Holdover Clock
Figure A-10
Table A-2
FAIL
CRITICAL
MAJOR
MINOR
Holdover Clock MIS Card LEDs
MIS LEDs
LEDs
MIS, Maintenance Interface System, Holdover Clock
Descriptions
RED – This card or its power supply has failed.
BLANK – No card or power supply failure detected.
RED – Holdover clock system has failed.
BLANK – No holdover clock system failure detected.
RED – Holdover clock system or any holdover clock card has
a major alarm.
BLANK – No major alarm detected.
YELLOW – Holdover clock system or any holdover clock
card has a minor alarm.
BLANK – No minor alarm detected.
Appendix A
A-13
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