This feature, known as Call Waiting, is only available if your network supports it. For details of how to activate and deactivate it see Call Waiting (Menu #.3.4)
If Call Waiting is on, you can place the first call on hold and answer the second, by pressing 
.
Rejecting an Incoming Call
You can reject an incoming call without answering by simply pressing the 
key.
During a call, you can reject an incoming call by pressing the 
key.
Muting the Microphone
You can mute the microphone during a call by pressing the [Options] key then selecting [Mute]. The handset can be unmuted by pressing the [Unmute]. When the handset is muted, the caller cannot hear you, but you can still hear them.
DTMF tones while calling
To switch on DTMF tones while calling (e.g. to use the phone with an automatic switchboard) press the key [Options] followed by Send DTMF _ DTMF on. Select DTMF off to disable DTMF tones. DTMF tones are normally on.
Conference Calls
The conference service provides you with the ability to have a simultaneous conversation with more than one caller, if your network service provider supports this feature. A conference call can only be set up when you have one active call and one call on hold, both calls having been answered. Once a conference call is set up, calls may be added, disconnected or separated (that is, removed from the conference call but still connected to you) by the person who set up the conference call. These options are all available from the
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