Panasonic KX-TA1232 Installation Manual page 78

General Installation
Maximum cabling distance of the doorphone and the door opener line
The maximum length of the doorphone and door opener line that connects to the main unit is
shown below:
Programming Guide Reference
[607-608] Doorphone Ringing Assignment —— Day / Night
Features Guide Reference
Door Opener
Doorphone Call
78
26 AWG: Under 70 m (230 feet)
24 AWG: Under 113 m (370 feet)
22 AWG: Under 180 m (590 feet)
22 AWG: Under 180 m (590 feet)
Doorphone
KX-T30865
Door Opener
Installation Manual