Panasonic KX-TD308 Installation Manual page 197

3 Features
R
inging Tone Selection for CO Buttons
Description
Conditions
Programming References
Feature References
Operation References
Allows the digital proprietary telephone user to select the desired
ringer frequency for each CO button. This distinguishes different
incoming outside calls.
There are eight ringer frequencies available. One of them can be assigned
to a CO button that is assigned as each of the following buttons: Single-
CO or Loop-CO button. It is not possible to assign a ringer frequency to
any other button.
Section 4, System Programming
[005] Flexible CO Button Assignment
Station Programming.......................................................User Manual
Ringing Tone Selection for CO Buttons
None
Not applicable.
R
Features 3-133