Samsung SGH-D900 User Manual page 34

Call functions
1. Press [ ] to answer the call. The first call is
automatically put on hold.
2. Press <Swap> to switch between the calls.
Using the Speakerphone feature
Use the stereo speakers on the front of the phone to
talk and listen with the phone a short distance away.
Press [ ] to activate the Speakerphone feature.
Press the key again to switch back to the earpiece.
Using In-call options
Press <Options> to access the following options
during a call:
• Voice clarity on/Voice clarity off: remove
extraneous noise and increase call quality so that
the person with whom you are speaking can hear
you clearly even if you are in a noise place.
• Mute/Unmute: switch off the phone's microphone
so that the other person on the phone cannot hear
you, or switch it back on.
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• Mute keys/Send keys: switch the key tones off
or on.
To communicate with answering machines or
computerised telephone systems, Send keys
must be selected.
• Phonebook: access the contact list.
• Send DTMF: send the DTMF (Dual tone multi-
frequency) tones as a group. The DTMF tones are
the tones used in phones for tone dialling,
sounding when you press the number keys. This
option is helpful for entering a password or an
account number when you call an automated
system, like a banking service.
• Message: read an incoming message and send a
new message. p. 53
• Join: set up a multi-party call by adding a caller
on hold to a currently active call. You can include
up to five people on a multi-party call.