Change of Identity

Overview

One or more Change of Identity messages may be sent for a non-passenger (freight or engineering) train, after activation, where the class of the train is to change.

This will happen if the train will run without wagons, or if the train is carrying a wagon with a defect and must run at a slower speed.

A train may change its identity at origin or en-route. The train's identity may change more than once at origin or en-route.

A scheduled timed for a Class 4, 6, 7 train may change to a Class 0, and it may change back again. However, a scheduled timed for a Class 0 train may not change to another train class.

Data structure

{
    "header": {
        "msg_type": "0007",
        "source_dev_id": "V2WX",
        "user_id": "#WAELKNK",
        "original_data_source": "SDR",
        "msg_queue_timestamp": "1511531881000",
        "source_system_id": "TRUST"
    },
    "body": {
        "current_train_id": "",
        "train_file_address": "BAX",
        "train_service_code": "56609010",
        "revised_train_id": "86417G1J24",
        "train_id": "86678V1J24",
        "event_timestamp": "1511531880000"
    }
}

Header

Field	Description
msg_type	Set to '0007' for an change of identity message
source_dev_id	LATA or CICS Session of the inputting terminal
user_id	NCI signon of the inputting user
source_system_id	Set to "TRUST" for a change of identity message
original_data_source	Set to "SDR" or "TOPS" for an change of identity message
msg_queue_timestamp

Body

Field	Description
train_id	The 10-character unique identity for this train at TRUST activation time
current_train_id	If this is the second or subsequent change of identity for a train, this field will contain the revised_train_id field from the previous change of identity message
revised_train_id	The new 10-character unique identity for this train. You should continue to track the original train_id field as well, as some other message types will not contain this new ID.
train_file_address	The TOPS train file address, if applicable
train_service_code	Train service code as per schedule
event_timestamp	The time, in milliseconds, when the train's identity was changed