There are two types of broken connections:
-
physical problem with the network cable (cut or disconnected)
-
disappearance of the remote device (break down, power cut, etc.)
Loss of connection is detected after 2 hours by the Keep Alive request.
If within this time the connection is re-established, restarting communications is different according to the type of break.
In this case the break in connection is caused by a network cable but the two stations remain operational.
When the cable is reconnected communication between the ETY module and the remote device will start again on the TCP/IP connection that was opened previously.
The remote device that disappeared was the server.
1
The client ETY module is still sending out data on the old connection (which remains half open).
2
The server receiving the information without associated connection sends out a Reset command and closes the old connection.
3
The client ETY module opens a new connection.
The remote device that disappeared was the client.
1
The client opens a new connection.
2
The server ETY module receives the request to open a new connection.
3
The server ETY module closes the old connection (if there is nothing in progress) and authorizes the new one. 
