
3.2 Installation of the PBX
Outside Installation
| (Main Building) |
|
Trunk | Surge Protector |
|
|
| |
| Trunk |
|
|
| Extn. |
| Terminal | PBX |
| Board | Surge |
| Extn. | |
| Protector | |
|
| |
| Extn. |
|
Extn. |
| |
SLT |
|
|
PT | CS |
|
| ||
|
| Earth |
(Another Building)
SLT
PT
CS
Extn.: Extension Line
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 surge protector for an extension and CS is different from that for trunks.
Installation of an Earth Rod
Surge Protector
Trunk
Earthing Wire
PBX
(Underground)
Earth Rod
78