| 370 / | HD | MULTIPLEX COMMUNICATIONS |
| 351 | DF | PATHFINDING OR ROUTING {5} |
| 357 | DF | .~ Through a circuit switch {4} |
| 360 | DF | .~.~ Switching control {8} |
| 381 | ![]() | .~.~.~ Having details of control storage arrangement {2} |
| 382 | DF | .~.~.~.~> Data memory addressing |
| 383 | DF | .~.~.~.~> Control storage addressing |