DS0 - beginning of digital telephony (T1, T3, E1, E3)

In last video, we talked about PCM, pulse Code Modulation, a method used to convert analog signals, such as a telephone call, to digital signals. PCM is a basis for understanding today’s topic: Digital Signal 0, or DS0, which is a fundamental key for understanding digital telephony.
In this video, we will also discuss about T-carrier’s T1 line, T3 line and E-carrier’s E1 and E3 lines.
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