| 370 / | HD | MULTIPLEX COMMUNICATIONS |
| 464 | DF | COMMUNICATION TECHNIQUES FOR INFORMATION CARRIED IN PLURAL CHANNELS {9} |
| 480 | DF | .~ Combining or distributing information via frequency channels {11} |
| 485 | ![]() | .~.~ Subscriber carrier {2} |
| 486 | DF | .~.~.~> Program distribution {1} |
| 488 | DF | .~.~.~> Connecting filters |