Circuit for conference telephony

Details Circuit for conference telephony Circuit for conference telephony

1985-05-20

1987-04-28

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 94, 379202, H04M 300, H04Q 1104, H04J 324

Patent

active

046619496

ABSTRACT:
A circuit for conference telephony using a conventional system for transmission of voice data and having no use for the conventional hybrid station is materialized by this invention using at least two buffer memory circuits provided for each of the frames and adapted to be switched to each other one for input and the other for output, enabling one of the buffer memory circuits to memorize voice data transmitted thereto and, in the meantime, permitting the voice data of the preceding frame memorized in the other buffer memory circuit to be read out, converting the voice data so read out to be converted into analog signals, and synthesizing the analog signals one another.

REFERENCES:
patent: 4063220 (1977-12-01), Metcalfe et al.
patent: 4280216 (1981-07-01), Zeitrag
patent: 4320501 (1982-03-01), Le Dieu et al.
patent: 4502137 (1985-02-01), Tan
patent: 4509166 (1985-04-01), Simon
patent: 4545050 (1985-10-01), van Baaroewijk et al.
patent: 4575845 (1986-03-01), Baranyai et al.

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