Method and apparatus for changing a sound source of a supplementary service using a ring back tone on calling

摘要

The disclosed technology relates to changing and pushing a sound source of a supplementary service using a ring back tone on calling. The first embodiment relates to a method and apparatus for changing a sound source of supplementary service using a ring back tone on calling. The second embodiment relates to a method and apparatus for pushing a sound source of a supplement service of a calling party to that of a called party on calling.