Interactive reverse ringback tones (IRRBT) are the same as normal ringback tones but have interactive functionalities and are targeted to the person who configures the tone. IRRBTs are heard on the telephone line by the caller who sets the IRRBT while the phone they are calling is ringing.
Unlike the RBT, the IRRBT is often generated in the nearest switch and transmitted in-band, so the IRRBT will take precedence if both are configured.
Social network ringback tones provide interactive social network content to subscribers. Mixcess is the first platform (social network) using IRRBTs in the United States. The IRRBT was developed by Ring Plus, Inc. (U.S. Patent No. 7,227,929 invented by Karl Seelig, et al.). The IRRBT can be used to share videos, music and messages from friends