Panasonic KX-TD816 Programming Manual page 149

2.5 Outside Line Programming
Voice Mail extension numbers – [118] Voice Mail Extension Number Set
Phantom extension numbers – [130] Phantom Extension Number Set
Floating numbers (of External Pagers, DISA messages and extension groups only) –
[81 3]Floating Number Assignment
PS extension number – [6 7 1]PS Extension Number Set
Features Guide References
Intercept Routing
General Programming 149