455 / | HD | TELECOMMUNICATIONS |
899 | DF | MISCELLANEOUS {5} |
FOR 106 | .~ Plural transmitters or receivers (i.e., more than two stations) (455/49.1) {4} | |
FOR 107 | DF | .~.~> Noise, distortion, or singing reduction (455/50.1) {2} |
FOR 113 | DF | .~.~> With central station (e.g., master, etc.) (455/53.1) {2} |
FOR 119 | DF | .~.~> Break-in or priority override (455/58.1) |
FOR 120 | DF | .~.~> Lockout or busy-idle signalling (455/58.2) |