Page party system

Details Page party system Page party system

1992-10-20

1994-11-29

Dwyer, James L.

Telephonic communications

Private or single line system

Having plural stations with selective calling

379182, H04M 1300, H04M 172

Patent

active

053696921

ABSTRACT:
A page party system for use in industrial environments, having a plurality of stations joined by a page line and by a single party line for providing multiple full-duplex conference calls over the single party line. Multiple full-duplex conferencing is achieved by combining single sideband suppressed carrier amplitude modulation and frequency division multiplexing.

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patent: 4734932 (1988-03-01), Lott
patent: 4847888 (1989-07-01), Cox et al.
patent: 4852156 (1989-07-01), Shigenaga
patent: 5014347 (1991-05-01), Cox et al.
patent: 5033080 (1991-07-01), Deane
patent: 5179588 (1993-01-01), Nowicki

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