Buick LaCrosse: Dual Tone Multi-Frequency 
(DTMF) Tones - Bluetooth (Infotainment Controls) - Phone - Infotainment System - Buick LaCrosse Owners ManualBuick LaCrosse: Dual Tone Multi-Frequency (DTMF) Tones

The in-vehicle Bluetooth system can send numbers during a call. This is used when calling a menu-driven phone system.

1. Turn the Menu knob to select Enter Number, then press SELECT.

2. Enter the character sequence.

See “Entering a Character Sequence” in Operation for more information.

    Muting a Call
    To Mute a Call Turn the Menu knob to select Mute Call, then press SELECT. To Cancel Mute Turn the Menu knob to select Mute Call, then press SELECT. ...

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