Purpose: a kind of method passes through mixing different digital sound data for hybrid digital voice and a kind of influence that for background music service is arranged to remove a sound of system. Construction: a processor executes entire function, stores mechanical sound data, transmission machine audible data a to switch sections, processing calling. One wide area network coalignment transmits continuous sound data to a sound mix unit. Sound mix unit simultaneously amplifies from the processor receiver tool sound, mixed sound and weakens sound data. The switch sections of processor, sound mix unit and a signal processor input digital signal, intercourse digital signal. DTMF (dual-tone multifrequency) signal of the signal processing machine testing from digital data, it is inputted from WAN coalignments, it detects and transmits a R2MFC (- 2 multifrequency codes of revision) signal and sound data are converted to IP (Internet protocol) packet from switch sections transmission. If digital voice data A and B (201) are entered, the data (201) of linear converter (202) the conversion input of sound mix part enter a liner code. The liner code of conversion is sent to an adder (203). The liner code of adder (203) addition conversion. Additional liner code is converted to an A-law or Mu-Law codes by one nonlinear converter (204).
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