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1. Take the phone off the hook so you can hear the dial tone and verify that telephone
service is available.
2. Press # # 1 to adjust the volume.
3. Press keys 1 to 4 to select the desired volume.
4. After selecting the desired volume, press the * key to save it. If you hear a single
confirmation tone, you have successfully set the volume level.
Note: If you hear a double tone you have pressed an incorrect key. The system will return to
the off-hook state, and you can try adjusting the volume again when you hear the dial
tone.
How to set the TTY mode?
Enter the keys # # 5 6 * n # to set the TTY mode.
n=0: TTY off mode. The standard voice speaking mode and the listening mode. This is
the default setting.
n=1: TTY full mode. Transmit and receive the TTY characters.
n=2: VCO mode. Receive TTY characters but transmit by speaking into the speaker.
n=3: HCO mode. Transmit TTY characters but receive by listening to the receiver.
Version: V100R001_01 Part Number: 3101xxxx
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