Index: leahi_dialin/fp/modules/events.py
===================================================================
diff -u -r9a4413f84d7a0cfc1b43a9a5eff5c53c139a0883 -r979d1b0306253b980d6ac01dd6fcf632eef2145a
--- leahi_dialin/fp/modules/events.py	(.../events.py)	(revision 9a4413f84d7a0cfc1b43a9a5eff5c53c139a0883)
+++ leahi_dialin/fp/modules/events.py	(.../events.py)	(revision 979d1b0306253b980d6ac01dd6fcf632eef2145a)
@@ -204,6 +204,11 @@
             op_modes_list = self._event_dictionary[fp_enum_repository.FPEventList.FP_EVENT_OP_MODE_CHANGE.name]
             
             # If there are Op mode change messages, use it to determine the operation mode for the current submode change
+            # Index description:
+            # 0: Timestamp
+            # 1: Name
+            # 2: Previous Op / Sub Mode
+            # 3: Current Op / Sub Mode
             if len(op_modes_list) != 0:
                 # Get the Sub Mode Change messages
                 sub_mode_list = self._event_dictionary[fp_enum_repository.FPEventList.FP_EVENT_SUB_MODE_CHANGE.name]
@@ -243,7 +248,12 @@
                 event_1_op_mode = self.UNKNOWN_STATE
                 event_2_op_mode = self.UNKNOWN_STATE
 
-                # Go through the list starting from the back
+                # Go through the Operation Status Change message list starting from the back
+                # Index description:
+                # 0: Timestamp
+                # 1: Op Mode
+                # 2: Sub Mode
+                # 3: State
                 for i in range(len(op_status_list) - 1, -1, -1):
                     op_status_msg = op_status_list[i]