Forming a higher hierarchy level signal in a synchronous digital communication system

摘要

The invention relates to a method and a circuit arrangement for forming a higher hierarchy level signal in a synchronous digital communication system. According to the method, (a) several lower hierarchy level signals are formed by means of separate circuits (22), and (b) a higher hierarchy level signal is formed by combining several lower level signals into one higher level signal. To form a higher hierarchy level signal as simply as possible, said separate circuits (22) are chained by means of a common bus (51) into a chain where said bus connects the separate circuits (22), in each circuit (22) the data of the channels to be formed by that circuit is added to the time slots corresponding to these channels in a higher hierarchy level frame, to the data of channels possibly added already in the other circuits of the chain, and the formed signal is connected forward from the circuit at the end of the chain. IMAGE