Zte Z2321U User Manual And Safety Information page 37

Set TTY Mode
Select a TTY mode for your phone to work with a teletypewriter, or turn TTY off.
1. From standby mode, press the OK key and choose Settings > Wireless & networks >
Call 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 Hearing Aids
Your phone supports the Hearing Aid Compatibility (HAC) function. When you turn on the hearing
aid compatibility and use a hearing aid with a telecoil to answer the phone, it will help you hear
more clearly during the phone call.
1. From standby mode, press the OK key and choose Settings > Wireless & networks >
Call settings.
2. Check Hearing aids to turn on hearing aid compatibility.
CAUTION:
Do not turn on the Hearing aids option unless you use a hearing aid with a telecoil. Using this
setting without a hearing aid or with a hearing aid without a telecoil may be harmful to your
hearing.
Set DTMF Tones
You can set the length of Dual-tone multi-frequency (DTMF) signal tones.
1. From standby mode, press the OK key and choose Settings > Wireless & networks >
Call settings > DTMF tones.
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