Digital signal transmitting system

Details Digital signal transmitting system Digital signal transmitting system

1985-07-05

1987-12-01

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

380 20, 380 43, H04J 312

Patent

active

047109211

ABSTRACT:
A digital signal transmitting system includes a digital signal generator, such as, an A/D (analog-to-digital) converter, for producing digital information signals representing music or data, and a control signal generator for producing a frame synchronizing signal and service bit signals which are time division-multiplied with the digital information signals for producing a composite digital signal. Further, a terminal number and a scramble key code are time division-multiplexed on the service bits within each different frame of the composite digital signal so as to make available the scramble key code at a terminal unit or receiving side of the system.

REFERENCES:
patent: 3341660 (1967-09-01), Duerdoth
patent: 3359373 (1967-12-01), Anderson et al.
patent: 3873776 (1975-03-01), Smith et al.
patent: 3936609 (1976-02-01), Waldeck
patent: 4176246 (1979-11-01), Gaetzi
patent: 4369443 (1979-12-01), Giallanza et al.
patent: 4531020 (1982-07-01), Wechselberger et al.

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