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 |