DIFF Subgroup
H04L 25/4906 Full Title
Baseband systems > Synchronous or start-stop systems, e.g. for Baudot code > Transmitting circuits; Receiving circuits > using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.