Panasonic KX-TA624 Installation Manual page 24

2.7 Exchange Line Connection
Installation
CO
Outside Installation
If you install an extension outside of the main building, the following precautions are
recommended:
(1) Install the extension wire underground.
(2) Use a conduit to protect the wire.
CO
Note • The lightning protector for an extension is different from that for CO.
2-8
Installation
CO
Lightning
Protectors
EXTN.
Ground
(Main Building)
Protectors
CO
CO
Main
Distribution
Frame
EXTN
EXTN
EXTN
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CO
Terminal
EXTN.
Board
EXTN.
TEL TEL
CO:
EXTN.: Extension line
TEL:
Main EXTN
Unit
Lightning
Protector
Earth
System
Protective
Earth
Terminal
Frame Ground
Exchange line
Telephone
(Another Building)
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