Voice direction recognition in a digital telephone station

Details Voice direction recognition in a digital telephone station Voice direction recognition in a digital telephone station

1990-02-15

1991-09-10

Dwyer, James L.

Telephonic communications

Supervisory or control line signaling

Using line or loop condition detection

379406, 379347, 379409, 455 78, H04M 160

Patent

active

050480820

ABSTRACT:
A method for controlling a voice-controlled voice direction recognition unit for a digital telephone station, which can be connected to termination units having different hybrid attenuations. The method prevents self-interruption in the transmission side due to an excessively low hybrid attenuation. This is achieved by providing a counter unit that identifies the switching occurrences of the voice direction recognition per time unit and, when a predetermined number is exceeded, that causes the voice direction recognition unit to connect an auxiliary attenuation element into every voice channel. The method can be utilized in digital telephone stations whose termination units are located in an appertaining switching system.

REFERENCES:
patent: 3145269 (1962-05-01), Gardner et al.
patent: 3280274 (1963-10-01), Schoeffler
patent: 3560669 (1971-02-01), Foulkes
patent: 3754105 (1973-08-01), Poschenrieder et al.
patent: 3953676 (1976-04-01), Brown
patent: 3992594 (1976-11-01), Helder
patent: 4571461 (1986-02-01), Uno et al.
patent: 4879745 (1989-11-01), Arbel

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