46
4
Installing and Routing Alarm Cables
Alarm Ports
a
Cable Connections and Installation Procedure
b
P
H
O
N
E
V
1
V
2
O
A
M
A
L
M
O
2
A
L
M
O
1
A
L
M
P
2
A
L
M
P
1
A
A
Upper subrack
Lower subrack
Alarm cascading cable
To the alarm monitor
A critical or major alarm generated by a subrack will be
reported by the alarm monitor.
Alarm cascading cable
between subracks
A
A
A
3
4
1
2
2
1
3
A
A
A
A
A
Cabinet 1
Cabinet 2
Alarm input ports (ALMI1-ALMI4)
Alarm output ports (ALMO1 and ALMO2)
2
1
Alarm input 1
Alarm input 2
Alarm input 3
1
2
4
3
Pin
Signal Designation
Ground of alarm input 1
Ground of alarm input 3
5
6
8
7
Pin
Signal Designation
Alarm
input
4
1
2
4
3
Positive critical and major alarm outputs
Reserved
Pin
Signal Designation
5
6
8
7
Reserved
Pin
Signal Designation
Reserved
Reserved
Negative critical and major alarm
outputs
Positive minor and warning alarm outputs
Negative minor and warning alarm
outputs
Ground of alarm input 2
Ground of alarm input 4
NOTE
