Telephone signal transmission device

Details Telephone signal transmission device Telephone signal transmission device

1986-07-14

1988-06-28

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

379 93, H04J 312

Patent

active

047544554

ABSTRACT:
A telephone signal transmission device capable of transmitting and receiving dial pulses in a network system which includes a telephone exchange is disclosed. Transitions of a connection signal are detected to allow a connection signal to be transmitted only when the transmission of a speech signal is needless. When the connection signal has a stable state (i.e. high or low) within a frame, only one bit is transmitted. The device effectively utilizes substantially all of the transmission bits for speech.

REFERENCES:
patent: 4007334 (1977-02-01), McDonald

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