This step operates of the in-band network. Originator connects to target's OOB port. Originator delivers an oob-begin packet, containing the authorization tokens, over the OOB link to the target mud. The target mud validates the authorization tokens. If the validation fails, then the target mud closes the connection.
Originator delivers all queued packets to the target mud.
The target should respond with various replies and acknowledgements during this process. The target is not yet allowed to actively send packets yet. Originator delivers an oob-end packet, signalling completion. If the target mud has any packets to deliver in an outbound queue for the originator, then it performs the deliveries. The originator should respond with various replies and acknowledgements during this process.