2.2 Installation of the Hybrid IP-PBX
Frame Earth Connection
Connect the frame of the Hybrid IP-PBX to earth.
Loosen the screw.
Insert an earthing wire (user-supplied)*.
Tighten the screw.
Connect the earthing wire to earth.
* For earthing wire, green-and-yellow insulation is required, and the cross-sectional area of the conductor
must be more than 0.75 mm
Be sure to comply with applicable local regulations (e.g., laws, guidelines).
Proper earthing (connection to earth) is very important to protect the Hybrid IP-PBX from the bad
effects of external noise or to reduce the risk to the user of electrocution in the case of a lightning strike.
The earthing wire of the AC cable has an effect against external noise and lightning strikes, but it may
not be enough to protect the Hybrid IP-PBX. A permanent connection between earth and the earth
terminal of the Hybrid IP-PBX must be made.
or 18 AWG.