Panasonic KX-TD816 Installation Manual page 68

2.3 Connection
Outside Installation Diagram
If you install an extension outside of the main building, the following precautions are
recommended:
a)
Install the extension wire underground.
b)
Use a conduit to protect the wire.
Protectors
CO
EXTN
TEL
Note
The lighting protector for an extension is different from that for outside line.
68
(Main Building)
CO
CO
Ter-
Main
minal
Unit
Board
EXTN
EXTN
TEL
(Another Building)
SLT
PT
EXTN
Lightning
Protector
Ground
General Installation