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

Compares a pair of characters entered by keyboard, Program: This program c...

Program: This program compares a pair of characters entered by keyboard. ; Registers used: AX, BX, CX, DX DATA SEGMENT                          XX DB?

Why the tcp checksum is necessary, Is the TCP checksum necessary? Yes, ...

Is the TCP checksum necessary? Yes, TCP Checksum is essential. TCP layer is liable for error detection, transmission of packets if needed, error control, reassembly of packe

Paged virtual memory - computer architecture, Paged virtual memory: Mo...

Paged virtual memory: Mostly all implementations of virtual memory divide the virtual address space of an application program into pages; a page is a block that contains conti

Determine the number of classes of ip addresses, The total number of class ...

The total number of class of IP address are? The total number of class of IP addresses are 5.

What is associative mapping cache, Q. What is Associative Mapping Cache? ...

Q. What is Associative Mapping Cache? The most fastest and flexible cache organization employs an associative memory that is displayed in Figure below. The associative memory s

What is the use of unions in c ?, Unions allow the same area of memory to b...

Unions allow the same area of memory to be accessed as different data types. The insurance example above would not work. Unions are useful (often in embedded programming) when i

Define the term busy hour, Define the term busy hour Busy Hour: Conti...

Define the term busy hour Busy Hour: Continuous 1- hour period lying completely in the time interval concerned, for that the traffic volume or the number of calls attempts is

Storage devices, Logic manufactures have produced 'large scale' logic (LSI)...

Logic manufactures have produced 'large scale' logic (LSI) blocks to achieve complex functions; a typical set of logic functions is that of data storage. There are two main types o

What is a binary tree, What is a binary tree? A binary tree 'T' is desc...

What is a binary tree? A binary tree 'T' is described as A finite set of elements, known as nodes, such that: either (i) or (ii) happens: (i) T is empty (known as the 'nu

Explain about theta notation, Q. Explain about Theta Notation? Theta Θ...

Q. Explain about Theta Notation? Theta Θ Notation : The set Θ (g(n)) comprises all functions f(n) for that there exist positive constants c1,c2 such that f(n) is squeezed in b

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