Mute the Handset Microphone
When you're on the phone, you can press the Mute soft key to turn off the microphone so the caller can't hear you. The display shows Mute On and 
while the microphone is muted. To turn off muting, press the Mute soft key again.
Tone Dialing Switch-over
If your telephone company uses pulse dialing, you can
If your phone is set to pulse dialing mode, make your call normally. Once your call connects, press the */tone key. Any digits you enter from then on will be sent as tone digits. When this particular call ends, the phone automatically returns to pulse dialing mode.
note 
You can only mute the handset ringer if the handset is off the base when the phone starts ringing.
Using Your Phone
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