Panasonic KX-TD500 System Reference Manual page 1228

55.00 World Select 4 (WS4)
Description
"WS4" command provides the following six assignments.
(Password level: Two or higher)
(1) Dial Tone Frequency Selection
Used to select an appropriate dial tone frequency depending on the
standard in your country.
(Parameters)
1 : 440 Hz (default)
2 : 660 Hz
(2) Paging Beep Tone Control
Used to remove paging beep tone.
By default, a beep tone sounds at the paged extensions.
(Parameters)
Y : Enable (default)
N : Disable
(3) TAFAS Confirmation Tone Control
Used to remove TAFAS confirmation tone.
By default, this tone sounds when a TAFAS call is answered by an
extension user.
(Parameters)
Y : Enable (default)
N : Disable
(4) Paging Confirmation Tone Control
Used to remove paging confirmation tone.
By default, this tone sounds when paging announcement is answered by an
extension.
(Parameters)
Y : Enable (default)
N : Disable
(5) Call Park Confirmation Tone Control
Used to remove Call Park Confirmation Tone.
By default, this tone sounds when a call is parked successfully and a parked
call is answered.
If you select "N", confirmation tone does not sound when a parked call is
answered.
(Parameters)
Y : Enable (default)
N : Disable
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