This technical paper describes the implementation of a color ring back tone (CRBT) wireless service. Focusing on the technologies and signaling involved, this document demonstrates how service providers can integrate CRBT into an existing Signaling System 7 (SS7) wireless application using Intel® NetStructure™ SS7 board and system-level platforms. The subject matter in this document assumes the reader has some knowledge of intelligent networking (IN) and SS7-based applications.