Huawei OptiX PTN 3900 Quick Installation Manual page 20

Installing and Routing cables
5
Installing and Routing Alarm Cables － Alarm Interfaces
Alarm concatenation and output interface (ALMO1)
Pin
Alarm output signal 1 (positive)
1
Alarm output signal 1 (negative)
2
Alarm output signal 2 (positive)
3
4
Alarm concatenation signal1 (positive)
Alarm concatenation signal 1 (negative)
5
6
Alarm output signal 2 (negative)
Alarm concatenation signal 2 (positive)
7
8
Alarm concatenation signal 2 (negative)
Alarm input interface （ALMI1）
Pin Funciton
Alarm input 1
1
Ground of alarm input 1
2
Alarm input 2
3
4 Alarm input 3
5 Ground of alarm input 3
6 Ground of alarm input 2
7
Alarm input 4
Ground of alarm input 4
8
14
Funciton
Alarm input interface （ALMI2）
Pin
Alarm input 5
1
Ground of alarm input 5
2
Alarm input 6
3
4 Alarm input 7
5 Ground of alarm input 7
6 Ground of alarm input 6
7
Alarm input 8
Ground of alarm input 8
8
Funciton