Discuss in detail the subscriber loop systems, Computer Engineering

Assignment Help:

Discuss in detail the subscriber loop systems.

Subscriber Loop System: Every subscriber in a telephone network is linked usually to the nearest switching office by means of wire's dedicated pair. Subscriber loop seems as to this pair of wires. This is unwidely to run physically independent pairs from each subscriber premises to the exchange. This is far easier to lay cables having a number of pairs of wires for various geographical locations and run single pairs as needed by the subscriber premises.

2086_Cable Hierarchy For Subscriber Loops.png

FIG - Cable Hierarchy For Subscriber Loops.

MDF = main distribution frame; MF = main feeder; FP = feeder point; BF = branch feeder; DW = drop wires; DP = distribution point; DC = distribution cable

Usually four levels of cabling are used as demonstrated in figure. At the subscriber ending, the drop wires are obtained to a distribution point. The drop wires are the single pairs which run into the subscriber premises. The drop wires are associated to wire pairs in the distribution cables, at the distribution point. Several distribution cables from nearby geographical locations are terminated on a feeder point where they are linked to branch feeder cables that, in turn, are linked to the main feeder cable. This main feeder cables carry a larger number of wire pairs, classically 100 to 2000, than the distribution cables that carry typically 10-500 pairs. These feeder cables are terminated on a main distribution frame (MDF) at the exchange. The subscriber cable pairs emanating by the exchange are also terminated at the MDF.


Related Discussions:- Discuss in detail the subscriber loop systems

Computer network architecture, A protocol is a formal description of messag...

A protocol is a formal description of message formats and the rules two or more machines must follow to exchange those messages. Because TCP (transmission control protocol) and IP

Write an algorithm for deadlock detection, Write an algorithm for deadlock ...

Write an algorithm for deadlock detection. An algorithm for deadlock detection: 1. Assume that Work and Finish be vectors of length m and n, correspondingly. Initialize:

OS, why we say OS is a resource allocator and control program

why we say OS is a resource allocator and control program

Why io devices cannot be connected to the system bus, Why IO devices cannot...

Why IO devices cannot be directly be connected to the system bus? The IO devices cannot be directly linked to the system bus because i.  The data transfer rate of IO device

EME, How can i made Carnot engine

How can i made Carnot engine

What is repository info. systems, What is Repository Info. Systems? It ...

What is Repository Info. Systems? It is a tool with which you can create data stored in the ABAP/4 Dictionary available

What are the characteristics of sram, What are the characteristics of SRAM?...

What are the characteristics of SRAM? SRAM are fast They are volatile They are of high cost Less density

superscalar pipelining, Put an "X" next to any of the following that are R...

Put an "X" next to any of the following that are RISC CPU characteristics that show diffrence between RISC from CISC a) has limited addressing modes b) used in Motorola 6000 pro

What are privileged instructions, What are privileged instructions?  So...

What are privileged instructions?  Some of the machine instructions that might cause harm to a system are designated as privileged instructions. The hardware permits the privil

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd