Panasonic KX-TAW848 Installation Manual page 51

Outside Installation
Lightning Protectors
CO Line
Extn.
SLT
If you install an extension outside of the building, the following precautions are recommended:
a.
Install the extension wire underground.
b.
Use a conduit to protect the wire.
Note
The lightning protector for an extension and CS may be different from that for CO
lines.
Installation of an Earth Rod
Lightning Protector
CO Line
Grounding
(Underground)
(Main Building)
CO Line
Hybrid
Terminal
IP-PBX
Board
Extn.
Extn.
APT CS
Hybrid
Wire
IP-PBX
Earth Rod
2.2 Installation of the PBX
(Another Building)
SLT
APT
Extn.
CS
Lightning
Protector
Earth
Extn.: Extension Line
Installation Manual 51