Panasonic KX-TD500 System Reference Manual page 91

4) Connection to Door Openers
Door opener 1
Door opener 2
Door opener 3
Door opener 4
• Set the door opener paired with the doorphone.
Only the telephone which received the doorphone call and in conversation can
open the door using door opener. System program determines the telephones
that can receive the doorphone calls and use the door opener.
DPH Card (KX-T96161)
door opener 1
doorphone 1
2-C-13
doorphone 1
Paired
door opener 1
doorphone 2
Paired
door opener 2
doorphone 3
Paired
door opener 3
doorphone 4
Paired
door opener 4