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} |
542 | DF | .~.~ Demultiplexing single input channel to plural output channels {2} |
543 | .~.~.~ Different rate output channels |