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2.2 Installation of the Hybrid IP-PBX
68 Installation Manual
2.2.14 Surge Protector Installation
Overview
A massive electrical surge can be caused if lightning strikes a telephone cable 10 m above ground, or if a
telephone line comes into contact with a power line. A surge protector is a device that is connected to a trunk
to prevent potentially dangerous electrical surges from entering the building via the trunk and damaging the
Hybrid IP-PBX and connected equipment.
To protect the system from electrical surges, we strongly recommend connecting the system to a surge
protector that meets the following specifications:
– Surge arrestor type: 3-electrode arrestor
– DC spark-over voltage: 230 V
– Maximum peak current: at least 10 kA
Additionally, proper earthing is very important for the protection of the system (refer to "2.2.5 Frame Earth
Connection").
Many countries/areas have regulations requiring surge protection. Be sure to comply with all applicable
laws, regulations, and guidelines.
Installation
CS
Trunk Trunk Trunk
Extn.
Extn. Extn.
Extn.: Extension line
Surge
Protector
Terminal
Board
Hybrid
IP-PBX
Frame
Earth
SLT
Earth
PT