370 / | HD | MULTIPLEX COMMUNICATIONS |
FOR 101 | DF | MULTIPLEX SWITCHING (370/53) {5} |
FOR 106 | DF | .~ TDM switching (time division multiplexing) (370/58.1) {12} |
FOR 110 | DF | .~.~ Packet or addressed data (370/60) {1} |
FOR 111 | ![]() | .~.~.~ Combined with circuit-switching (370/60.1) |