Samsung WEP900 Manual page 17

Rejecting a call
Press and hold the talk button to reject a call when a call comes in.
Using options during a call
You can use the following functions to control your call during a call.
Transferring a call from the phone to the headset
Press the talk button to transfer a call from the phone to the headset.
Placing a call on hold
Press and hold the talk button to place the current call on hold.
Answering a second call
Press the talk button to end the first call and answer a second call when
you hear call waiting tones.
Press and hold the talk button to place the first call on hold and answer
a second call when you hear waiting tones.
To switch between the current call and the held call, press and hold the
talk button.