Panasonic KX-TD816 Programming Manual page 316

3.3 ISDN Line Programming
• To assign all ports to one selection, press the
the contents programmed for Port 01.
• After this assignment, you should reset the system to make this assignment effective.
Features Guide References
Integrated Services Digital Network (ISDN)
316
key in step 3. In this case, the display shows
ISDN Programming