Zte Z667G User Manual page 64

Voicemail.
2. Touch Service to select the voicemail service provider. Your
carrier is the default.
3. Touch Setup to edit the voicemail number if necessary.
Set TTY Mode
Select a TTY mode for your phone to work with a teletypewriter,
or turn TTY off.
1. In the Phone app, touch the Menu Key > Settings > TTY
mode.
2. Select one of the following options. Consult your
teletypewriter manufacturer's manual if necessary.
TTY Off: Users who can hear and talk can disable TTY

support.
TTY Full: Users who cannot talk or hear may use this

mode to send and receive text messages through a TTY
device.
TTY HCO: Users who can hear, but cannot talk, may use

this mode to listen to conversation of the other party and
respond via text messages.
TTY VCO: Users who can talk, but cannot hear, may use

this mode to talk through the phone and receive
responses via text messages.
Set DTMF Tones
You can set the length of Dual-tone multi-frequency (DTMF)
signal tones.
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