| 370 / | HD | MULTIPLEX COMMUNICATIONS | 
| 351 | DF | PATHFINDING OR ROUTING {5} | 
| 389 | DF | .~ Switching a message which includes an address header {11} | 
| 400 | DF | .~.~ Having a plurality of nodes performing distributed switching {6} | 
| 410 |  | .~.~.~ Having a signaling feature |