Motorola DROID Manual page 206

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CHAPTER 7: Making Phone Calls
TTY Mode – This option specifies the
deaf accessibility settings for the DROID.
Possible values for this option are Off,
Full, HCO, or VCO.
DTMF Tones – This option sets the
length of the tones you hear when you
press a key on the dialpad between
Normal (default) and Long. This can be
useful if you are calling automated
systems with a bad connection; making
the tones longer can help the system
recognize the digits you input.
HAC Mode Settings – These settings
govern hearing-aid compatibility.
Voice Privacy – This option adds an
extra layer of encryption to your voice
calls; it is set to Checked (on) by default.
Show Dialpad – This option enables you
to set the phone to automatically show
the dialpad after you are connected to a
phone number. The default shows the
dialpad only for Voicemail, toll-free, and
900 numbers; however, you can change
this setting to show the dialpad for
Custom phone numbers or even All
calls.