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Which two statements are true about analog to digital conversion of voice signals for use in digital telephony networks？（）
- A、The three required steps in the analog to digital conversion are sampling，encoding，and compression.
- B、The three required steps in the analog to digital conversion are sampling，quantization，and compression.
- C、The three required steps in the analog to digital conversion are sampling，quantization，and encoding.
- D、The output of the sampling process is a pulse code modulation （PCM） signal.
- E、The output of the sampling process is a pulse amplitude modulation （PAM） signal.
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更多 “Which two statements are true about analog to digital conversion of voice signals for use in digital telephony networks？（）A、The three required steps in the analog to digital conversion are sampling，encoding，and compression.B、The three required steps in the analog to digital conversion are sampling，quantization，and compression.C、The three required steps in the analog to digital conversion are sampling，quantization，and encoding.D、The output of the sampling process is a pulse code modulation （PCM） signal.E、The output of the sampling process is a pulse amplitude modulation （PAM） signal.” 相关考题
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单选题What are two steps that are taken when a router converts a voice signal from analog to digital form？（）A
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voice gateways need a gatekeeper to interconnect the VoIP networks the PSTN networkC
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voice gateways equipped with a DSP module can take the role of the call agent during WAN failure.
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A CSU/DSU converts analog signals from a router to a leased line; a modem converts analog signals from a router to a leased line.B
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