Multiplex communications – Wide area network – Packet switching
Patent
1985-10-29
1987-04-14
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 63, H04Q 1104
Patent
active
046583971
ABSTRACT:
A telephone or like telecommunications network is disclosed which has n input highways and m output highways, where n is not less than m, each for the time division multiplex transmission of k channels of data. For selective data transfer between any selected channel of any selected input highway and any selected channel of any selected output highway, a digital, time division switching system is provided which comprises n data memories corresponding respectively to the n input highways, each data memory having k addresses corresponding respectively to the k channels of the corresponding input highway. A control circuit having a control memory causes the data from the input highways to be written sequentially into the data memories and for reading the data memories n times during a preassigned transmission period of each channel on the input and output highways. The data that have been read out from the data memories are gated to pass only the data that have been recovered from that address which corresponds to the selected channel, of that data memory which corresponds to the selected input highway, to the desired channel of the desired output highway.
REFERENCES:
patent: 4276637 (1981-06-01), LeDieu
patent: 4365330 (1982-12-01), Chopping et al.
patent: 4455648 (1984-06-01), Biaz et al.
patent: 4500986 (1985-02-01), Carver
Kamigaki Masaharu
Kawamura Masataka
Iwatsu Electric Co. Ltd.
Olms Douglas W.
Rokoff Kenneth I.
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