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Question

Which of the following is a major component of the telephone system?

A
Local loop
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B
Trunks
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C
Switching office
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D
All of these
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Solution

The correct option is D All of these

Which of the following is a major component of the telephone system:-

Local loop:- local loop, a twisted-pair cable that connects the subscriber telephone to the nearest end office or local central office. The local loop, when used for voice, has a bandwidth of 4000 Hz (4 kHz).

Trunks:- Trunks are transmission media that handle the communication between offices. A trunk normally handles hundreds or thousands of connections through multiplexing. A connection to toll office is called toll connecting trunk. Transmission is usually through optical fibers or satellite links.


Switching office:- To avoid having a permanent physical link between any two subscribers, the telephone company has switches located in a switching office. A switch connects several local loops or trunks and allows a connection between different subscribers.



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