Panasonic KX-TD816 Programming Manual page 170

2.5 Outside Line Programming
• Outside lines 25 through 54 become available when the KX-TD290 or KX-TD188
expansion unit is installed in the KX-TD1232.
• To assign all outside lines to one selection, press the
shows the contents programmed for outside line 01.
Features Guide References
Outside Line Connection Assignment
170
key in step 3. In this case, the display
General Programming