Profile: Kenton Research Ltd. specializes in communication equipment. Our product line includes alarm unit MOD7822, amplifiers, branching & combining equipment, cable joints, DTMF signaling converter, and dual switched line combiners. Our amplifying unit provides a nominal gain of 30 dB in both directions of transmission in the frequency range 300Hz to 4KHz. The gain in each direction of transmission is adjustable in 0.5dB steps by attenuators on the input. The maximum output to line is +14.5dBm, powered from either 24 or 48 VDC. Our TR01335 is an isolation transformer, designed to meet the barrier requirements between carrier network lines and subscriber's equipment.