Abstract: A solid-state circuit for maintaining line current in a two-wire telephone line placed on "HOLD" by the subscriber. A shunt impedance is connected in series with a pair of transistor switches, the first of which conducts only when the telephone line voltage is lower than a predetermined value and the second of which conducts whenever a momentary contact switch is manually actuated. The second transistor continues to conduct until a subsequent substantial decrease in telephone line voltage, indicative of a renewed off-hook condition, is detected.