Panasonic KX-TD500 System Reference Manual page 426

For the assignment of the FWD/DND, SAVE and MESSAGE buttons, refer to the
following.
FWD/DND button
SAVE button
MESSAGE button
Usage
SP-PHONE (MONITOR) Button and Indicator
This key allows the set user to receive or originate calls without using the handset.
Each time the SP-PHONE button is pressed, the speaker and microphone are
alternately switched on and off.
AUTO/MEMORY, AUTO DIAL/STORE Button and Indicator
This button is used for dialing system speed dial numbers and for storing the
results of a local programming operation.
PAUSE Button
This button is used to insert a pause in a speed dial number.
REDIAL (LNR) Button
This button is causes the last number dialed to be redialed when the key is
pressed.
SAVE (SNR) Button
This button allows the set user to store the telephone number to make the same
call again by pressing the key.
AUTO ANS/MUTE, AUTO ANSWER/MUTE Button and Indicator
This dual function button is used to automatically answer an intercom call or
disable the microphone during handsfree operation.
HOLD Button
This button allows the set user to place any call at the set on hold.
TRANSFER Button
This is used to transfer an outside or an intercom call to another extension.
FWD/DND Button and Indicator
This button can be used for setting or canceling the Call Forwarding or Do Not
Disturb feature.
CONF Button and Indicator
Allows the user to perform a three party conference.
FLASH Button
This button causes a flash signal to be sent to the Central Office.
MESSAGE Button and Indicator
This button can be used for Message Waiting feature.
Section 10-G-1.02 ~ 1.04 "Extension-Station
Section 13-C-2.00 "PF (Programmable Feature)
Button Assignment"
Section 10-G-1.02 ~ 1.03 "Extension-Station
4-B-2
(2/4, 3/4, 4/4)"
(2/4, 3/4)"