Source : Free On-Line Dictionary of Computing

go voice
     
         When two or more parties stop communicating
        digitally and resuming the conversation via voice
        communication over the telephone.
     
        Prototypically this is used (e.g., "Wanna go voice?") between
        two modem users to denote the action of picking up the phone
        while shutting off the modem, in order to use the same line
        for voice communication as had was being used for data
        transmission.
     
        Compare: {Voice-Net}.
     
        (1997-01-31)