Ta上传的资源 (0)

SamplinganddigitizationSamplingtheorem&AliasingDigitizationnoiseClassicalPCMCompandingAandlawsSpeechredundanciesSyllabiccompandingDifferentialPCMDelt

The principle of electric telephony Signaling Direct links Manual exchanges Automatic exchanges Pulse dialing Tone dialing The General Switched Teleph