Matrix Telecom Proton 206, System Manual

Page: 65 / 98

PROTON 206/308 V1 System Manual 65
8. “Day and Night Modes” 40
9. “System Security (Passwords)” 70
Protecting the System
The PROTON 206/308 does not work in isolation with the environment. It is connected to the environment in
following ways:
•
Power is fed to the system for functioning of the system.
• Being a PBX system, trunk lines and stations are also connected to the system.
• The system should be protected from static charges that could find their way through the system
components.
If the system is protected from these interfaces, 100% satisfactory and trouble free performance of the system is
guaranteed.
Protecting the system from heavy voltages from the Mains:
The PROTON 206/308 is designed to work with input voltages ranging between 90-265VAC. To protect the
system from abrupt changes in the input voltage, use of CVT is recommended. CVT of 100VA is recommended.
Protecting the system from heavy voltages on the trunk lines and the overhead stations:
The PROTON 206/308 can get damaged if heavy voltages enter the system from trunk lines or from overhead
stations.
These heavy voltages could be due to:
•
Heavy voltage line falling on the CO line or on the overhead stations cable.
• Thunderbolts.
• Short-circuit of trunk lines or overhead station cables with electric cables. It is necessary to protect the
system from these voltages. The protection can be in the form of some protection devices like GDTs, MOVs,
Fuses, etc. These protection devices are inbuilt for each trunk in the system.
These devices work satisfactorily only if they are properly earthed. It is recommended that the PROTON 206/
308 is provided a separate telecom earth. A dedicated terminal marked ‘ETH’ is provided on the MDF 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
earth is not perfect, instead of providing protection to the system, it may damage the system.
Protecting the system from static charges:
While installing the system or servicing the system, care must be taken to provide a path to the static charges. It
is advisable for the system engineer to touch a grounded object before touching the system before installation or
maintenance.
Protecting the system from Lightning:
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.