370 / | HD | MULTIPLEX COMMUNICATIONS |
351 | DF | PATHFINDING OR ROUTING {5} |
357 | DF | .~ Through a circuit switch {4} |
360 | DF | .~.~ Switching control {8} |
366 | DF | .~.~.~ Including serial-parallel or parallel-serial conversion for input or output {2} |
367 | .~.~.~.~ For distribution to a multiplanar switching network |