What are the different types of distributing frames, Computer Engineering

Assignment Help:

What are the different types of distributing frames used in exchanges?

The various distribution frames used in exchange are demonstrated in figure. Every subscriber in a telephone network is linked generally to the nearest switching office through means of a dedicated pair of wires. Subscriber loop considers to this pair of wires. This is unwisely to run physically independent pairs from all subscriber premises to the exchange. This is far easier to lay cables having a number of pairs of wires for several geographical locations and run individual pairs as needed by the subscriber premises.

558_Cable Hierarchy For Subscriber Loops.png

FIG - Cable Hierarchy For Subscriber Loops.

Here 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 end, the drop wires are acquired to a distribution point. The drop wires are the single pairs which run in the subscriber premises. On the distribution point, the drop wires are linked to wire pairs in the distribution cables. Several distribution cables from nearby geographical locations are terminated on a feeder point; here they are connected 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 100-2000, than the distribution cables that carry usually 10-500 pairs. The feeder cables are finished on a main distribution frame (MDF) at the exchange. The subscriber cable pairs emanating by the exchange are also terminated at the main distribution frame.


Related Discussions:- What are the different types of distributing frames

Define the state and instance of properties of object, Define the state and...

Define the state and instance of properties of object A state encompasses all properties of object along with values of each of these properties. An instance is a concr

What is an accessor in c++, An accessor is a class operation that does not ...

An accessor is a class operation that does not change the state of an object in C++. The access or functions require to be declared as const operations

Analog-to-digital conversion process, A stationary random displacement sign...

A stationary random displacement signal was digitised at 64 samples a second and analysed to obtain an auto-spectral density.  The signal was calibrated in mm units.  The frame siz

What does the future in gimp, Version 2.8 may bring a combined Transform to...

Version 2.8 may bring a combined Transform tool (Scale, Rotate,Flip and Perspective), more use of Cairo for attractive ant aliased graphics and more usability improvements. We will

What is modem?, A device, usually linked to a serial port of a computer, th...

A device, usually linked to a serial port of a computer, that transfer data over regular phone lines. Modem stands modulator demodulator; it changes a digital stream of data into s

What is a single stage network, In a single stage network: (A) ...

In a single stage network: (A)  There is no redundancy (B)  There is redundancy (C)  Alternative cross points are available (D)  Alt

What is a demultiplexer, What is a demultiplexer? Ans: Demultiplex...

What is a demultiplexer? Ans: Demultiplexer: This is a logic circuit which accepts one data input and distributes this over some outputs. This has one data input, m selec

Artificial neural networks, Artificial Neural Networks: However imagin...

Artificial Neural Networks: However imagine now in this example as the inputs to our function were arrays of pixels and there actually taken from photographs of vehicles such

What is a spool request, What is a Spool request? Spool requests are f...

What is a Spool request? Spool requests are formed during dialog or background processing and placed in the spool database with information about the printer and print format.

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