Three-port conference circuit for use in a digital telephone sys

Details Three-port conference circuit for use in a digital telephone sys Three-port conference circuit for use in a digital telephone sys

1985-10-07

1987-06-30

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

379202, H04Q 1104

Patent

active

046776109

ABSTRACT:
A three-port conference circuit for use in a pulse code modulated communication system including a first speaker register including an input connected to a telephone system information memory output and including an output, a second speaker register including an input connected to the telephone system information memory output and including an output and a conference adder connected to the first and second speaker register outputs via inputs and including an output connected to a sample inverting circuit of the telephone system. The conference adder adds talking samples by means of an included eight-bit floating point adder.

REFERENCES:
patent: 3967070 (1976-06-01), Srivastava et al.
patent: 4301531 (1981-11-01), Lubin
patent: 4393496 (1983-07-01), Zeitraeg

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