| 370 / | HD | MULTIPLEX COMMUNICATIONS |
| 351 | DF | PATHFINDING OR ROUTING {5} |
| 357 | DF | .~ Through a circuit switch {4} |
| 360 | DF | .~.~ Switching control {8} |
| 369 | ![]() | .~.~.~ Having time and space switches {4} |
| 370 | DF | .~.~.~.~> Having space switch as intermediate stage (e.g., T-S-T, T-S-S, or S-S-T) {1} |
| 372 | DF | .~.~.~.~> Having time switch as intermediate stage (e.g., S-T-S or T-T-S) |
| 373 | DF | .~.~.~.~> Having supervisory signaling |
| 374 | DF | .~.~.~.~> Having details of control storage arrangement |