When several connections are configured, one can associate different services to different connections. On the "Service separation" page you could configure which connection voice, management and internet traffic (default routing) should be sent over.
With the priority radio buttons (1 – 5, 1 highest and 5 lowest) you could configure which connection should carry which service.
The priority is used for connection fallback configuration. If one connection drops due to whatever reason, the priority defines which connection should be used as a fallback.
The "Don’t Use" radio button is used if any service is prohibited to go over a connection. For example: internet traffic (default routing) may be not allowed to go over the management connection.
