The invention relates to a data transmission system for the frame-oriented digital
data transmission of a plurality of useful signals embedded in a carrier signal,
using time-division multiplex operation, rate matching being undertaken between
the useful signals and the carrier signal by means of stuff locations. The data
to be stuffed, and the management information for the reassignment are embedded
in previously unused 8 bytes in the path layer overhead of the carrier signal superframe,
and protected by an HC(6,3,3) code. Clear channel signals can advantageously be
transmitted using the system, and the transmission is time-transparent and data-transparent.
