During a Call
How to Change the Volume
You can use the volume keys to increase or
decrease the ear piece volume.
How to Mute the Microphone
❶
Press and hold down the CLR key. Mute is
shown in the display.
❷
To resume conversation, release the CLR key.
How to Use the Display as a Scratch Pad
You can enter a phone number on the keypad during a call. When you
end the call the number remains in the display.
To call the number press YES.
You can also store the number in the phone book. See The Phone Book,
p. 13.
How to Send Tone Signals
You can send DTMF tones by pressing the keys 0-9,
* and # in order to
perform banking by phone or to control an answering machine. Read
more about DTMF tones in DTMF Tones, p. 28.
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Summary of Contents for TH688
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