Time-division multiplex digital switching network for a PCM tele

Details Time-division multiplex digital switching network for a PCM tele Time-division multiplex digital switching network for a PCM tele

1978-08-14

1982-10-19

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 13, 370 58, H04J 306, H04J 314

Patent

active

043553869

ABSTRACT:
In a time-division multiplex digital switching system as for example for PCM telephone exchange utilizing duplicate field installations, the exchange clock pulse generating arrangement is provided in duplicate for the purpose of clock pulse or frequency supply of said coupling field installations, and one arrangement is phase synchronized by the other master frequency determining unit and one exchange clock pulse generating portion supplies one coupling field half in each instance, and the other supplies the other half. The functions of the exchange clock pulse generating portions can be entirely or completely interchanged, as for example, when faults or failures appear in certain portions of the equipment.

REFERENCES:
patent: 3557315 (1971-11-01), Kobus
patent: 3725593 (1973-04-01), Palombari
patent: 3803568 (1974-04-01), Higashide
patent: 4025874 (1977-05-01), Abbey
patent: 4096396 (1978-01-01), Melindo

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