Panasonic VA-12020 Operating Instructions Manual page 35

OPTIONAL EQUIPMENT
This system can be more conveniently used by installing optional equipment
You can page through external paging amplifier (if connected). External paging is also
heard from the speakers of the telephones belonging to the paging zone-3 if they have
been designated by system program.
Up to two door boxes can be installed and used with this system. The calling tone of door
box A is a chime and that for door box B is tremolo tone.
If there is a door box call while you are talking with the other door box, the calling tone
will be heard only by you.
Note that with a telephone which rings, answer the call from door box within 15 seconds,
dial door box number to call door box.
To answer telephone which rinqs
To answer telephone which does not ring
1. Lift handset
2. Press dial keys #03
3. Make your announcement into the mouthpiece of handset
(when within
Simply lift handset and begin talking
1. Lift handset
2. Dial the door box number -from where the call is coming (75
for door box A, 76 for door box B) and begin talking
3 4
15 seconds of call)
1