Buick Regal 2011 Owner's Manual page 184

Mute or UnMute a Call
1. Press the control button.
2. Select the Mute call.
3. Select the Mute call again to
unmute the call.
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. Press the control button.
Infotainment System
2. Select Enter Number option and
enter the number sequence.
The DTMF Tones will be generated
on the network as you enter each
number.
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