Explain the ccitt hierarchical structure of switching, Computer Engineering

Assignment Help:

Explain the CCITT hierarchical structure of switching using block schematic.

Hierarchical network are able of handing heavy traffic where needed, and at similar time use minimal number of trunk groups. The 5-level switching hierarchy is recommended through CCITT as shown in figure. Traffic from subscriber A to subscriber B and vice-versa flows by the highest level of hierarchy, in a strictly hierarchical network and namely as Quaternary centres in figure. A traffic route through the highest level of hierarchy is termed as the final route. Though, if there is high traffic intensity among any pair of exchanges, direct trunk groups may be established among them as demonstrated by dashed lines in figure. These direct routes are termed as high usage routes. Wherever high usage routes exist, the traffic is primarily routed through them. Overflow traffic, if any, is routed along the hierarchical path. No overflow is permitted from the final route. In figure the first option routing for traffic between subscribers A and B is via the high usage route across the primary centres. The second and the third choice route and the last route are also indicated in figure. A hierarchical system of routing leads to basic switch design. Three methods are usually used for deciding on the route for an exact connection:

1. Right-through routing.

2. Own-exchange routing.

3. Computer-controlled routing.

652_Computer-controlled routing.png

 

110_CCITT  hierarchical  structure.png

(c) CCITT hierarchical structure


Related Discussions:- Explain the ccitt hierarchical structure of switching

What are the exceptions encountered for fp operation, What are the exceptio...

What are the exceptions encountered for FP operation? The exceptions encountered for FP operation are overflow, underflow. /0, inexact and invalid values.

What are the types of convergences, What are the types of convergences? ...

What are the types of convergences? Three different types of convergences are: a. The convergence of wireless and e-commerce technology b. The Convergence of E-Commerce a

Explain folded network, Explain Folded network. Folded network: While...

Explain Folded network. Folded network: While all the inlets/outlets are connected to the subscriber lines, the logical connection shows as demonstrated in figure. When, the

Existential elimination, Existential Elimination : Now we have a sente...

Existential Elimination : Now we have a sentence, A, is with an  existentially quantified variable, v, so then just for every constant symbol k, that it does not appear anywhe

Problem specification - logic programs, Problem Specification : Hence ...

Problem Specification : Hence given the above context for "ILP" there we can state the learning problem as follows: that we are given a set of positive and a set of negative e

Strings made of left curly braces, In a logical system, a judgement is a st...

In a logical system, a judgement is a statement that is either true or false. So far, you are most familiar with the type of judgement "A is true", which is often simply abbreviate

Define syntax of mpi_bcast function, Q. Define syntax of MPI_Bcast function...

Q. Define syntax of MPI_Bcast function? MPI_Bcast(msgaddr, count, datatype, rank, comm):   This function is used by a process ranked rank in group comm to transmit messag

client will now send ten integers , Change this program so that every clie...

Change this program so that every client will now send ten integers and receives their sum from the server. In Java, for loops can be easily executed as follows: for (int i = 0 ; i

What are the disadvantages of a smart card, What are the disadvantages of a...

What are the disadvantages of a Smart Card? Disadvantages of Smart Cards are as follows: a. The value of money can be depleted and recharged. b. Customers should keep

Explain the typical organization of a computer, Q. Explain the typical orga...

Q. Explain the typical organization of a computer? There are two principal components: hardware and software. The former refers to physical components such as memory unit (MU),

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