Huawei U8800-51 - Manual (Page 27)

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Calling
1. Connect the TTY device to the headset jack of the phone and set the phone to the
TTY mode.
2. Make or answer calls as normal.
3. When the call is put through, use the TTY device to send or receive the letters.
4. Touch
End to end the call.
Setting the TTY Mode
1. Touch > Settings > Call settings > TTY mode.
2. Select one TTY mode.
• TTY Off: The standard voice speaking mode and the listening mode.
• TTY Full: Transmit and receive the TTY characters.
• TTY HCO: Transmit TTY characters but receive by listening to the earpiece.
• TTY VCO: Receive TTY characters but transmit by speaking into the microphone.
Setting Hearing Aid Compatibility
Touch > Settings > Call settings > Hearing aids to set your phone to be
compatible with a hearing aid.