COMMUTATION AND CONFERENCE-CALL DEVICE FOR INFORMATION EXCHANGE SYSTEM Russian patent published in 2000 - IPC

Abstract RU 2154911 C2

FIELD: communication equipment. SUBSTANCE: device has digital unit for establishing conference call, and multiple units for establishing commutation and conference calls. EFFECT: simplified control. 3 cl, 6 dwg

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RU 2 154 911 C2

Authors

Dzae-Min Park

Dates

2000-08-20—Published

1996-12-06—Filed