Electronic music/voice ringer circuit for telephone.

摘要

An electronic music/voice ringer circuit for use in telephone sets. It can be used in telephone lines of any system and incorporated in telephone sets of any type. It consists mainly of a transistor acting as an amplifier, and an integrated music/voice signal generator which can be connected directly to ringing pulse line to convert a series of intermittent ringing pulses into continuous sweet music calling signals or voice calling signals.