2012 Buick LaCrosse Owner's Manual - Page 237

Infotainment System Conference Calling Conference calling and three‐way calling must be supported on the Bluetooth phone and enabled by the wireless service carrier to work. To start a conference while in a current call: 1. Turn the Menu Knob and press SELECT. 2. Select Enter Number. 3. Enter the character sequence then select Call. See "Entering a Character Sequence" in Overview (Radio with CD) on page 7‑4 or Overview (Radio with CD/DVD and MEM) on page 7‑6 or Overview (Radio with CD and Touchscreen) on page 7‑8 for more information. 4. After the call has been placed, turn the Menu Knob to choose Merge Calls then press SELECT. 5. To add more callers to the conference call, repeat Steps 1 through 4. The number of callers that can be added is limited by your wireless service carrier. 7-63 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 Overview (Radio with CD) on page 7‑4 or Overview (Radio with CD/DVD and MEM) on page 7‑6 or Overview (Radio with CD and Touchscreen) on page 7‑8 for more information. Ending a Call Turn the Menu knob to select Hang Up, then press SELECT. 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.