Multiplex communications – Wide area network – Packet switching
Patent
1988-02-17
1990-03-27
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370112, H04J 302
Patent
active
049127047
ABSTRACT:
A digital interface for PCM data, allowing bidirectional data exchange between a processing unit and a PCM channel, the data being transmitted in records each divided into a plurality of groups (bytes) transmitted at successive periods in homologous time intervals. This interface comprises a reception memory receiving from the PCM channel data groups to be stored, a control processor connected to the reception memory and receiving therefrom complete data records, a transmission memory, receiving from the control processor data records to be transmitted on the PCM channel. The reception and transmission memories are divided into a plurality of buffers storing data records received or to be transmitted in preset time intervals. A timing phase sequencer is connected to the memories and to a protocol controller for detecting a data record reception beginning and correctly storing data groups of a same record in the reception memory and controlling transmission of a data record in data groups from the transmission memory towards the PCM channel in preset time intervals.
REFERENCES:
patent: 4389544 (1983-06-01), Wagner et al.
patent: 4644525 (1987-02-01), Ellis et al.
patent: 4720828 (1988-01-01), Jones
patent: 4730348 (1988-03-01), MacCrisken
patent: 4757518 (1988-07-01), Lagadec
patent: 4774704 (1988-09-01), Gass et al.
Bonicioli Paolo
Buonfigliuoli Giorgio
Carminati Gianbattista
Etefin S.p.A.
Josif Albert
Modiano Guido
Olms Douglas W.
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