| 370 / | HD | MULTIPLEX COMMUNICATIONS |
| 310 | DF | COMMUNICATION OVER FREE SPACE {10} |
| 345 | ![]() | .~ Combining or distributing information via time channels {4} |
| 346 | DF | .~.~> Polling |
| 347 | DF | .~.~> Multiple access (e.g., TDMA) {1} |
| 349 | DF | .~.~> Using messages having an address field as header |
| 350 | DF | .~.~> Synchronization |