FIELD: communication. SUBSTANCE: device has housing, which has receiving-transmitting unit, processing and switching unit, communication element, user interface for off- hand mode operations. Processing and switching unit and user interface controls device which may be switched to off-hand waiting mode which may be interrupted to provide device operations in handset mode when additional handset is connected to loudspeaker telephone by means of communication unit. EFFECT: increased functional capabilities. 10 cl, 5 dwg
