Telephone operation
Options while on calls
Flash
If you subscribe to call waiting service from your local 
telephone service provider (see About caller ID on 
page 23), you hear a beep if someone calls while you 
are already on a call. Press FLASH on the handset to put your current call on hold and take the new call. You can press FLASH anytime to switch back and forth between calls and to activate other telephone company subscriber services such as
Mute
You can press and hold MUTE to silence the microphone during a conversation. You can hear the caller, but the caller does not hear you until you release MUTE to resume conversation.
Temporary tone dialing
This feature can temporarily switch from pulse to
1. During a call, press TONE 
.
2. Use the dialing keys to enter the relevant number. The telephone sends
3.The telephone automatically returns to pulse dialing mode after you hang up.
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