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

Operation research, how to implement a modified distribution method using c...

how to implement a modified distribution method using c/c++

C++, explain parallel database system

explain parallel database system

Average enzyme activity , Activity of a some  enzyme was calculated  in ext...

Activity of a some  enzyme was calculated  in extracts from brain, heart and lung. In every  tissue,  the activity was calculated  various  times, giving the following results (in

When the get cursor command used in interactive lists, When the get cursor ...

When the get cursor command used in interactive lists? If the hidden information is not enough to uniquely recognize the selected line, the command GET CURSOR is used.  The GET

Explain parsing, What is parsing? The target of parsing is to find out...

What is parsing? The target of parsing is to find out the syntactic validity of a source string. A tree is built for use through subsequent phase of compiler, if the string is

Explain complete binary tree, Complete Binary tree A complete binary tr...

Complete Binary tree A complete binary tree can be described as a binary tree whose non leaf nodes have nonempty left and right sub tree and all leaves are at the similar level

Eme, state function and path function

state function and path function

Pruning - artificial intelligence, Pruning - artificial intelligence: ...

Pruning - artificial intelligence: Recall which pruning a search space means deciding that there certain branches to should not be explored. Moreover if an agent knows for sur

Comparison between centralized and distributed spc, Explain the principles ...

Explain the principles of operation of centralized SPC and distributed SPC and compare their performance. All the control equipment is replaced with a single processor that mus

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