Panasonic KX-TD816 Programming Manual page 304

3.3 ISDN Line Programming
• To assign all outside lines to one selection, press the
shows the contents programmed for outside line 01.
• Lunch / break mode will only work when "Regular" is assigned in this programme.
Features Guide References
Integrated Services Digital Network (ISDN)
304
key in step 3. In this case, the display
ISDN Programming