PBX Telephone system remote synchronization

Details PBX Telephone system remote synchronization PBX Telephone system remote synchronization

1985-02-25

1985-12-03

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 60, 370 94, 370100, H04Q 1104, H04J 300, H04J 600, H04J 306

Patent

active

045569703

ABSTRACT:
Telephone system interface circuitry for regulating the full duplex exchange of asynchronous serial bit signal information between the system's station equipment and central equipment matrix switch includes a central equipment signal processor, central equipment master clock, and individual central equipment signal ports for each station, and includes in each station equipment variable time delay transmission circuitry responsive to the signal information transmitted periodically from the central equipment for transmitting station information at the same periodic interval but delayed from the received central signal information by a delay time interval selected to regulate the actual time of arrival (TOA) of the station information at the associated central port coincident with a desired TOA for that port.

REFERENCES:
patent: 3268669 (1966-08-01), Vigliante et al.
patent: 3671674 (1972-06-01), Lutz
patent: 3851105 (1974-11-01), Regnier et al.
patent: 3862372 (1975-01-01), Deutsch
patent: 3908092 (1975-09-01), Hight et al.
patent: 4064360 (1977-12-01), Koenig
patent: 4179587 (1979-12-01), Herschtal
patent: 4317195 (1982-02-01), Barberis et al.
patent: 4320500 (1982-03-01), Barberis et al.

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