| 370 / | HD | MULTIPLEX COMMUNICATIONS |
| 464 | DF | COMMUNICATION TECHNIQUES FOR INFORMATION CARRIED IN PLURAL CHANNELS {9} |
| 498 | DF | .~ Combining or distributing information via time channels {17} |
| 536 | ![]() | .~.~ Demultiplexing single signal into plural parallel channels (e.g., parallel transmission for increasing transmission speed) |