Multiplex communications – Wide area network – Packet switching
Patent
1987-09-23
1990-06-19
Orsino, Joseph A.
Multiplex communications
Wide area network
Packet switching
370102, 375112, H04J 306
Patent
active
049359215
ABSTRACT:
In a cross-connection network, a plurality of asynchronous input digital signals can be cross-connected to a plurality of output lines by use of time switch. The input digital signals are pulse stuffed at a common higher bit rate and are synchronized to one another by attaching extra bits. The pulse stuffed signals are assigned into serial frames in a predetermined order by the multiplex technique and are interchanged from one to another by the time switch in the time division fashion. The frame-interchanged signal is demultiplexed to reproduce the pulse-stuffed signals which are sent out to the respective output lines assigned to the frames after removing extra bits. When the input digital signals are of higher order group, each of the higher order group digital signals is demultiplexed to lower order group signals which are pulse stuffed to be synchronized to the common higher bit rate. The pulse stuffed lower order signals are rearranged by the multiplex technique to reform each of the high order group signal which is synchronized to one another. The reformed higher order group signals are assigned in serial frames and are processed in the similar manner as described above. The frame-interchanged signals are reversely processed to be separated, demultiplexed, destuffed, and multiplexed to reproduce the input signals as the output signals.
REFERENCES:
patent: 4512012 (1985-04-01), Sampei et al.
patent: 4542500 (1985-09-01), Jean-Claude
patent: 4543652 (1985-09-01), Aandu et al.
patent: 4667324 (1987-05-01), Graves
patent: 4688233 (1987-08-01), Nishiwaki et al.
Hayashi Kuniyasu
Ishizaki Yasutoshi
Maruta Rikio
Rokugo Yoshinori
Sakaguchi Hisashi
NEC Corporation
Orsino Joseph A.
Scutch III Frank M.
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