Electronics Engineering Assignment Help

Electronics is field of science and also an engineering discipline, where non-linear and active electrical components such as electron tubes, and semiconductor devices, transistors, diodes and integrated circuits, are utilized to design electronic circuits, devices and systems, typically also including passive electrical components and based on printed circuit boards.

It is a vast area of knowledge and has the following sub-fields:

  • Electronic circuits
  • Signal processing
  • Telecommunications engineering
  • Control engineering
  • Instrumentation engineering

 

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Telecommunications Sample Assignment

 

1) Three terminals A, B, and C are to be connected to three computers D, E and F so that A is connected D, B to E and C to F. All are in different cities. A and D are 1500 miles apart as are B and E and C and F. The locations of the terminals are 25 miles apart (i.e., A is 25 miles from B and C and B is 25 miles from C). The same is true for the locations of the computers D, E and F.

 

If telephone lines cost $1 per mile, what is the line cost for three independent lines?

A ---------------------------------------- D
B ---------------------------------------- E
C ---------------------------------------- F

$1 (Dollar per mile)x 1500 (miles per line) x 3(lines) = $4500

 

If a multiplexer/demultiplexer pair costs $2000, can you save money by another arrangement of lines? If so, how much?

A ------------------------------------------------------------D
| $1x25miles + $1 x 1500 (line)------------------------------- |
B ---mux/demux-------------------------------mux/demux --------- E
| $1 x 25miles + $2000 (mux demux) ------------------------- |
C ------------------------------------------------------------ F

Total : ($1x25x2) x 2 + $2000 + $1x1500 = $3600
Therefore there a saving of $900.

(If someone uses $2000 x 2 for mux/demux pair then it is wrong since you need only one piece of equipment which has both the functions so only a pair would be needed for covering both the ends)

2) What is the switching technique used in the PSTN?

PSTN uses circuit switching for switching voice and data calls. The signaling for PSTN is carried on using a separate packet switching network discussed in the next answer.

3) What is common channel signalling? Name three services that it enables on the PSTN?

CCS (Common Channel Signaling) is a separate signaling network connecting all the switches in the PSTN. It enables services like 800, 900 number calling, Call forwarding, caller_id, and all advanced intelligent services.