Abstract: A volume control apparatus of telephone comprises a base assembly including a plurality of recesses, a gong assembly secured to the base assembly, a drive device threadedly secured to the base assembly including a clapper slidably provided therein, and a volume control assembly secured to the base assembly including a lever having a protrusion, a bent stopper engaged with the lever, and an engagement member; wherein the protrusion of the lever is selectively engaged with one of the recesses when the lever is moved to a locked position, resulting in a distance change of the clapper with respect to the engagement member and the gong assembly respectively, thereby generating a plurality of corresponding sound volumes when the clapper reciprocally hits on the gong assembly and the stopper.

Abstract: A double-bell ringing system of a telephone, including a base, a first bell and a second bell bilaterally supported on the base, a driving mechanism mounted on the base and controlled to reciprocate a reciprocating rod in striking the first bell and the second bell alternatively, the reciprocating rod having two plastic end pieces packed at its two opposite ends for beating the first bell and the second bell respectively, and a control bar mounted on the base and alternatively set between a first position where the control bar stops the reciprocating rod from striking the second bell, and a second position where the control bar is moved out of the path of the reciprocating rod for permitting the reciprocating rod to strike the first bell and the second bell alternatively.