TDM and FDM telephone communication

Details TDM and FDM telephone communication TDM and FDM telephone communication

1975-07-11

1977-03-22

Stewart, David L.

179 25R, 179 15AL, 179 15AT, H04J 110

Patent

active

040138402

ABSTRACT:
A plurality of communicating stations have transmitters, receivers and control means. The transmitters are tunable across a broad radio frequency spectrum and transmit an amplitude modulated selected carrier frequency. Each receiver is set to receive only one preselected amplitude modulated carrier frequency fixed and identified with each particular station. Stations may be regarded as telephones having signaling means and a chassis. The control means includes means to receive TDM control signals from and to supply TDM control signals to a remote common equipment unit. The control signals and amplitude modulated carriers are sent and received over common cabling. The common equipment unit includes processor means to process and generate control signals and means to interface with an external telephone system.

REFERENCES:
patent: 3573379 (1971-04-01), Schmitz
patent: 3809815 (1974-05-01), Reed
patent: 3864521 (1975-02-01), De Long

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