Fiber Break Detection

After IPA is configured, the detection board and auxiliary detection boards involved in the IPA determine whether a fiber break occurs by detecting for the relevant alarms.

There are two methods used to detect the fiber break to achieve the IPA function.

Detect the LOS of the optical amplifier board
Detect the signals of the auxiliary detection board

Through a combination of these methods, the fiber break can be judged more correctly. Following is the logic of problem handling.

If all the configured detection items meet the fiber break condition at the same time, initiate the shutdown process of the IPA.
If one of the detection conditions recovers to normality, initiate the recovery process of the IPA.

Table 1 lists the detection/auxiliary detection boards in the OptiX OSN 6800A and the corresponding alarms that trigger the IPA function.

**Table 1** Detection/auxiliary detection boards in the OptiX OSN 6800A and the corresponding alarms that trigger the IPA
Detection Board/Detect Auxiliary Board	Alarm Trigger Condition of the IPA
OAU1, OBU1, OBU2, HBA	MUT-LOS
LSXL, LSQ, LSXLR, NS3, NS2, L4G, LOG, LOM, LQMS, LQG, TMX, LSX, LSXR, LQMD, ND2, TOM, NQ2, 11LEX4, 11LEM24, 11LSC11	LOS, LOC, LOF
SC1, SC2	LOS, LOF, RAI

Table 2 lists the detection/auxiliary detection boards in the OptiX OSN 3800A and the corresponding alarms that trigger the IPA function.

**Table 2** Detection/auxiliary detection boards in the OptiX OSN 3800A and the corresponding alarms that trigger the IPA
Detection Board/Detect Auxiliary Board	Alarm Trigger Condition of the IPA
OAU1, OBU1, OBU2, HBA	MUT_LOS
LQG, L4G, LOG, LQMS, TMX, LSX, LSXR, LOM, LQMD, TOM, 11LEX4, 11LEM24	LOS, LOC, LOF
SC1, SC2	LOS, LOF, RAI

Table 3 lists the detection/auxiliary detection boards in the OptiX OSN 8800 T16(NA)/8800 T32 (NA)/8800 T64 (NA) and the corresponding alarms that trigger the IPA function.

**Table 3** Detection/auxiliary detection boards in the OptiX OSN 8800 T16 (NA)/8800 T32 (NA)/8800 T64 (NA) and the corresponding alarms that trigger the IPA
Detection Board/Detect Auxiliary Board	Alarm Trigger Condition of the IPA
OAU1, OBU1, OBU2	MUT_LOS
LDX, LOG, LOM, LQM, LQMD, LQMS, LSX, LSXL, LSQ, LSXLR, LSXR, LWXS, NS2, ND2, NS3, NQ2, TMX, TOM, 11LEX4, 11LEM24, 11LSC11	LOS, LOC, LOF
SC1, SC2	LOS, LOF, RAI