LG F2400 Guide De L'utilisateur page 239

General functions
Muting the microphone
You can mute the microphone during a call by
pressing the [Menu] key then selecting Mute on. The
handset can be unmuted by selecting Mute off. When
the handset is muted, the caller cannot hear you, but
you can still hear them.
Switching DTMF tones on during a call
To turn DTMF tones on during a call, press the left soft
key, and then select DTMF on. DTMF tones can be
turned off the same way. DTMF tones allow your
phone to make use of an automated switchboard.
Multiparty or conference calls
The multiparty or conference service provides you
with the ability to have a simultaneous conversation
with more than one caller, if your network operator
supports this feature. A multiparty call can only be set
up when you have one active call and one call on
hold, both calls having been answered. Once a
multiparty call is set up, calls can be added,
disconnected or separated (that is, removed from the
multiparty call but still connected to you) by the
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person who set up the multiparty call. These options
are all available from the In-Call menu. The maximum
callers in a multiparty call are five. Once started, you
are in control of the multiparty call, and only you can
add callers to the multiparty call.
Making a second call
You can make a second call while currently on a call.
Enter the second number and press the
When the second call is connected, the first call is
automatically placed on hold. You can swap between
calls by pressing the left soft key then selecting Swap.
Setting up a conference call
Place one call on hold and while the active call is on,
press the left soft key and then select the
Conference/Join all.
Putting a conference call on hold
Press the left soft key, then select the
Conference/Hold all.
key.