COMMUTATION AND CONFERENCE-CALL DEVICE FOR INFORMATION EXCHANGE SYSTEM
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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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | 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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