Uniden BT229 - Manual (Page 9)

9
Call Waiting
To use this feature, you must subscribe to Call Waiting through your service
provider, and your phone must support the hands-free profile.
To put your current call on hold and switch to a waiting call, press and hold Up until you hear 
beeps (about  seconds). When you release the button, you’ll be connected to the waiting call.
(Press and hold Up again to switch back to the original call.)
To hang up your current call and switch to a waiting call: press and hold DoWn for about 
seconds. Wait until you hear  beeps, then release the button.
Voice-activated dialing
To use this feature, your phone must support voice dialing, and
all voice commands must already be programmed.
To activate voice dialing, make sure your phone is in standby. Then, press and hold MFB until
you hear a beep (about  seconds).
Use your pre-programmed voice commands as you would with your phone. (For best results, try
recording your voice tags through your headset. )
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