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What are concentrators? Explain how it helps in connecting number of subscribers.
In rural areas, subscribers are usually dispersed. This is both unessential and expensive to give a dedicated pair for each subscriber. Three techniques are utilized to gain on the number pairs are as following:
1. Parity lines
2. Concentrators
3. Carrier Systems.
In second technique, a concentrator expander (CE) is utilized near the cluster of users and other one at the exchange end as demonstrated in figure.
FIG - Concentrator-expander connection for dispersed subscribers.
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Add 648 and 487 in BCD code. Ans. In BCD Code, addition of 648 and 487: 6 4 8 = 0 1 1 0 0 1 0 0 1 0 0 0 4 8 7 = 0 1 0 0 1 0 0 0 0 1 1 1 ---------------------
what is the anatomy of digital computer
A star connected intermediate exchange is known as a? A star connected intermediate exchange is termed as a Hub exchange.
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derive an expression for vandar wall equation of state?
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