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F.
MUX Unit
ALB
O~F
ON
I
a:::J
CH 1
c::::::J
C H 2
I
IT5
II
g~ ~
ON LINE
FAIL
ALB SET
~
-I
LJ
u
ALB, piano switch:
ISS 3, NECA 365-407-301
CHANGE-2
ON:
Sends loopback command to remote
station when set to ON.
OFF:
Normal status
NOTE:
1.
Before setting ALB switch to ON, ALM unit
MAINT SW must be ON.
2. CH NOs corresponding to RLB SWs are CH1
through CH4 from the top.
3.
Nos.
1
through
4
shown at right side of ALB
SWs do not indicate CH NOs.
ON LINE, green LED:
Indicates unit is online when lit.
FAIL, red LED:
Indicates unit failure when
lit.
ALB SET, red LEO:
Indicates that ALB switch is ON when lit.
t
Figure 3-7 MUX Unit (X0300A/B) Controls and Indicators
t
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