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SYSTEM PREVENTING DOUBLE DIGIT DETECTION CAUSED BY IN-BAND DUAL-TONE MULTI-FREQUENCY SIGNALING AND METHODS THEREOF
SYSTEM PREVENTING DOUBLE DIGIT DETECTION CAUSED BY IN-BAND DUAL-TONE MULTI-FREQUENCY SIGNALING AND METHODS THEREOF
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机译:带内双音多频信号引起的防止双数字检测的系统及其方法
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摘要
A T2P (TDM to packet) delay buffer is provided. The delay buffer can preventdouble digit detections caused by in-band DTMF leak when out-of-band DTMF isused.The T2P delay buffer is initialized with an audio pattern that representssilence in aconfigurable amount of delay. When a DTMF digit is detected, the system canstoptaking the voice payload from the T2P delay buffer and start injecting RFC4733RTPpackets into the RTP stream at a pre-configured rate, The RFC4733 DTMF RTPpackets continue to be injected into the RTP stream until the DTMF digitstops. Oncethe end of the DTMF digit is detected, the content of the T2P delay buffer canbediscarded and the T2P delay buffer is reinitialized with an audio pattern thatrepresentssilence in a configurable amount of delay. After the T2P delay buffer isreinitialized, thevoice packetization can be continued.
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