Data mode signaling system for PCM modem adaptation
A modem, data mode technology, applied in the field of communication, can solve problems such as time-consuming
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[0025] see now figure 1 , the figure shows a PCM modem communication system 10 in which an analog modem 12 is connected to a digital network 16 via an analog local loop 14 and then connected to a digital modem 18 by utilizing the telephone company's central office, CO 20, as described above A central office is used to connect the local loop to the digital network.
[0026] As shown, both analog and digital modems have transmitter and receiver sections, labeled T x and R x .
[0027] It will be understood that CO 20 includes, but is not limited to, an analog-to-digital converter and a digital-to-analog converter, with information flow to the digital modem indicated by arrow 22 and information flow from the digital modem indicated by arrow 24 . It should be noted that the Recommendation G.711 of the Telecommunication Standardization Sector of the International Telecommunication Union stipulates the characteristics and operation steps of the analog-to-digital converter and the...
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