Samsung SCH-R970ZWAUSC - Manual (Page 86)

Other call settings
� From the Call Settings screen, under Other call settings,
the following options are available:
• Auto retry: When enabled, the phone will automatically redial a
call if it receives a busy signal from the network.
• TTY mode: Choose a TTY mode to enable TTY mode, for use
with optional TTY equipment.
• DTMF tones: Set the length of Dual-tone Multi-frequency
tones, which play when you use the keypad during a call, such
as when navigating phone menus.
• Voice privacy: Enable or disable Enhanced voice privacy, to
improve the security of phone calls.
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