:: Automatic voltage regulator ST4 and voltage inverters SI99 (up to 5kW) and SI99S (up to 9 kW).
:: PK1-OVP3 is a protection box designed for connection of telecommunication line with subscriber installation and overvoltage and overcurrent protection of subscriber's devices.
:: With twin subscribers junction box we can solve the problem with twin subscribers (subscribers usin the same pair), enabling them to use the phone service simultaneously.
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