3GPP AKA - Milenage algorithm 3GPP TS 35.205, .206, .207, .208.

This class provides methods to play DTMF tones (ITU-T Recommendation Q.23), call supervisory tones (3GPP TS 22.001, CEPT) and proprietary tones (3GPP TS 31.111). Depending on call state and routing options, tones are mixed to the downlink audio or ou

3GPP TS26.073 AMR音频编解码源码，支持Fixed-point(3GPP TS26.073 AMR audio codec source code, support Fixed-point)