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E1 Telphony link, analysis of performance parametersThe European E1 digital telephone system transmits at 2048 kbps and the DS-1 system carries data signals in the US at 1.544 Mbps.a. How many voice channels are carried by a E1 transmission given 8 kHz sampling and 8 bit words?b. Why is an end of frame marker always required in a digital telephony system?c. What is the typical distance between repeaters for an DS-1 signal sent over a twisted pair telephone line?
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The schematic of the traffic light controller
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Explain the structure and nature of the ionosphere with reference to daily, seasonal and long-term changes and explain the modes of propagation of radio waves of different frequencies
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