| 370 / | HD | MULTIPLEX COMMUNICATIONS |
| 351 | DF | PATHFINDING OR ROUTING {5} |
| 357 | DF | .~ Through a circuit switch {4} |
| 360 | DF | .~.~ Switching control {8} |
| 366 | ![]() | .~.~.~ Including serial-parallel or parallel-serial conversion for input or output {2} |
| 367 | DF | .~.~.~.~> For distribution to a multiplanar switching network |
| 368 | DF | .~.~.~.~> Having details of control storage arrangement |