Matrix VISIONPRO System Manual 16
Battery
VISIONPRO contains a 3VDC/15mAh (Li-Al) alloy Manganese Dioxide coin battery (ML 1220 - Rechargeable) of
diameter 12.5mm and height 2.0mm. The battery should be replaced only by authorized dealers of Matrix. End
users must not attempt to replace it.
There lies the risk of explosion if the battery is replaced in an incorrect manner. Please dispose off used
batteries properly without violating the regulations in your country/region.
Telecom Earth (Ground)
To protect the system from extremely high voltage currents resulting from lightning strikes, you must install a
lightning protector on an outside (CO) line.
Telecom Earth (Ground) is the most important safety procedure to prevent electrical shocks and fires. It protects the
system from lightning strikes, electrical transients, static discharges, electromagnetic interference and surges of
telephone lines.
A dedicated terminal for earthing is provided in the port side panel of the system to which the telecom earth should
be connected.
Telecom earth is a dedicated earth only for the PBX. The advantage of having a dedicated earth is that there is no
risk of back voltage. There are chances that if the earthing is not perfect, instead of providing protection to the
system, it may damage the system.
Make sure your electrical earthing is proper and separate from the telecom earth used for the system.
Protecting the system from high current surges is achieved by installing primary protection device. A lightning
protector is a primary protection device which is used to prevent a dangerous surge from entering the building and
damaging the system. For equipment installed in a more exposed environment, it is necessary to protect the
system with primary protectors such as PPMs. With the development of electronic equipment, problems due to
lighting surges have increased. A dangerous surge can occur if a telephone line comes in contact with a power line.
A lightning protector should be installed on an outside (CO) line to prevent a dangerous surge from entering the
building and damaging the system. The best place for the insertion of the primary protection is the cable entry point
of the building, shelter or equipment housing.
System
Protective Earth
Terminal
CO Line
Lightning
Protectors
CO Line
Telecom Earth
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