Device and method for regulating voltage level at section of telecommunications network, the device including an input port, which receives input RF telecommunications signal with input AC voltage from a network portion, isolating circuitry, which isolates input AC voltage, a transformer, which receives the isolated AC voltage, relays, which provide selected voltage gain by selectively switching on connection from transformer secondary winding, thereby deriving regulated AC voltage at predetermined level, control circuitry, which monitors input AC voltage and selectively activates a selected relay while deactivating other relays to provide selected voltage gain, recombining circuitry, which recombines regulated AC voltage with isolated input RF telecommunications signal, and an output port, which provides recombined regulated AC voltage and RF telecommunications signal to another network portion.