Functions
Mute Function
Pressing the MUTE button turns off the telephones microphone so that the other party cannot hear you, but you can hear them. Pressing the MUTE button again restores connection to the microphone so the other party can again hear you. The LCD will display “MUTE” while the function is active.
Flash Button
If you subscribe to “Call Waiting” (a special telephone service) the FLASH button is used to connect the line to another incoming call or to establish a dial tone to make another call while still connected to the initial caller.
Note: If you do not subscribe to Call Waiting, pressing the FLASH button during a call will disconnect the current call.
Phone Book Function
You can store 70 numbers and names in the phone book, refer to the “FUNCTION OPERATIONS”, under the “PHONE BOOK” section for details.
Headset Function
To use a headset, connect a headset with a 2.5mm connector into the headset jack. To make a call, press the HEADSET button. A dial tone will be heard on the headset and the phone may be dialed. To end the call, push the HEADSET button again.
Volume Function
The volume level of the handset, headset and speakerphone can be set using the volume 
and 
buttons. To adjust, go
Ringer Volume Switch
Set the ringer volume switch to the desired position (HI/LOW/OFF). To have the maximum ringer volume, move the ringer volume switch to the HI position. To have a low ringer volume, move the ringer volume switch to the LOW position. If you would prefer the ringer not to disturb you, move the ringer volume switch to the OFF position.
Pulse/Tone Switch
Set it to TONE if you have “touch tone dialing”, or set it to PULSE if you have a “rotary dial phone”.
Buttons Function
Use these buttons to scroll through menu functions, Caller ID, Dialed Calls and Phone book records.