| 370 / | HD | MULTIPLEX COMMUNICATIONS | 
| 351 | DF | PATHFINDING OR ROUTING {5} | 
| 389 | DF | .~ Switching a message which includes an address header {11} | 
| 412 | DF | .~.~ Queuing arrangement {3} | 
| 417 |  | .~.~.~ Having output queuing only {1} | 
| 418 | DF | .~.~.~.~> Contention resolution for output |