diff --git a/protos/voltha_protos/openolt.proto b/protos/voltha_protos/openolt.proto
index 3bb0673..d2a252b 100644
--- a/protos/voltha_protos/openolt.proto
+++ b/protos/voltha_protos/openolt.proto
@@ -206,6 +206,9 @@
         OnuItuPonStatsIndication onu_itu_pon_stats_ind = 13;
         OnuDeactivationFailureIndication onu_deactivation_failure_ind = 14;
         OnuRemoteDefectIndication onu_remote_defect_ind = 15;
+        OnuLossOfGEMChannelDelineationIndication onu_loss_gem_delineation_ind = 16;
+        OnuPhysicalEquipmentErrorIndication onu_physical_equipment_error_ind = 17;
+        OnuLossOfAcknowledgementIndication onu_loss_of_ack_ind = 18;
     }
 }
 
@@ -530,6 +533,25 @@
     fixed32 rdi_errors = 3;
 }
 
+message OnuLossOfGEMChannelDelineationIndication {
+    fixed32 intf_id = 1;
+    fixed32 onu_id = 2;
+    string status = 3;
+    fixed32 delineation_errors = 4;
+}
+
+message OnuPhysicalEquipmentErrorIndication {
+    fixed32 intf_id = 1;
+    fixed32 onu_id = 2;
+    string status = 3;
+}
+
+message OnuLossOfAcknowledgementIndication {
+    fixed32 intf_id = 1;
+    fixed32 onu_id = 2;
+    string status = 3;
+}
+
 message GroupMember {
     enum InterfaceType {
         PON = 0;