Samsung BHM3200 - Manual (Page 18)

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Dialling a number by voice
Press and hold the Talk button and say a name.
This function is only available on the primary phone using the Hands- Free profile. •
This function may not be available on some devices. •
Answering a call
Press the Talk button to answer a call when you hear incoming call tones.
When two calls from the two connected phones come in, you can answer the call
of the first phone.
Ending a call
Press the Talk button to end a call.
Rejecting a call
Press and hold the Talk button to reject a call when a call comes in.
When two calls from the two connected phones come in, you can reject the call of
the first phone.
This function is only available when using the Hands-Free profile.