| 摘要 |
The invention concerns a radio-relay station made compatible with any selected group among groups of plesiochronous signals with multiplexer so as to include in the station programmable circuits common to the groups., independently of the signal speed resulting from multiplexing. A frame with a structure independent of the speed is formed by constituting groups of plesiochronous signals (SE1, SE2, SE3) with substantially whole mutually multiple speeds (DE1, DE2, DE3), selecting a group, multiplexing the signals in the selected group into a multiplex signal (SMk), the speeds of the multiplex signals being whole mutually multiple, distributing the multiplex signal bits in a field of predetermined length in the frame after multiplying the multiplex signal speed by a constant, and forming a resulting signal (SRk) by inserting into the frame a lockword and a field of supplementary bits or predetermined length.
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