Interlogix AR7400 Series - Manual (Page 4)

B
A
C
Electrical Audio Input Strength
Optical carrier received
Power
Status indicating
LEDs will change
from RED to GREEN
with these conditions.
Increasing Audio Level
AT7400
A
B
Audio Channel 2
Indicators
Audio Channel 4
Indicators
Audio Channel 1
Indicators
Audio Channel 3
Indicators
Power
AR7400
C
B
Power
Optical Detect
NOTE: WITHOUT PROPER FIBER CONNECTION, LED's DO NOT INDICATE
CORRECT OPERATIONAL STATUS OF THE UNIT.