Samsung SGH-S275DAATFN - Manual (Page 40)

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– Memo: Allows you to access your Memos.
– Send DTMF: Sends DTMF (Dual Tone Multi-Frequency) tones to the
contacts you have selected. These DTMF tones are sent 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.
• End Call: ends the current call.
Using the Speakerphone During an Active Call
While in an active call, you can enable/disable the speakerphone
feature.
Ⅲ During a call, press
to toggle the state of the
speakerphone function.
• : indicates the speakerphone mode is off.
• : indicates the speakerphone mode is on.
Muting or Sending Keypad Tones
These options allow you to turn the key tones off or on. If the Mute
Keypad Tone option is selected, it allows you to press keys without
hearing key tones during a call.
Note: To communicate with answering machines or computerized
telephone systems, the Send Keypad Tone option must be
selected.