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 do you mean by electronic funds transfer, What do you mean by Electron...

What do you mean by Electronic Funds Transfer? Electronic Funds Transfer: It’s an electronic payment method which transfers the money value through one bank account to o

What are advantages and disadvantages of using eeprom, What are advantages ...

What are advantages and disadvantages of using EEPROM? The benefits are that EEPROM do not have to be removed for erasure. Also it is possible to delete the cell contents selec

Pipeline processing-parallel computer architecture , Pipeline Processing ...

Pipeline Processing Pipelining is a process to realize, overlapped parallelism in the proposed answer of a problem, on a digital computer in an economical way. To understand th

What information is stored in a typical TLB table entry, In a simple paging...

In a simple paging system, what information is stored in a typical Look-aside Buffers  TLB table entry? A classical TLB table entry contains page# and frame#, while a logical

Alpha-beta pruning, Alpha-beta pruning: Thus we can prune via the alph...

Alpha-beta pruning: Thus we can prune via the alpha-beta method, it makes means to perform a depth-first search requiring the minimax principle. Just compared to a breadth fir

Why a task cannot return a value, Why a task can n ot return a value? ...

Why a task can n ot return a value? If tasks can return values then Let's take a look at the below example. A=f1(B)+f2(C); and f1 and f2 had delays of say 5 and 10? Whe

Determine the decimal equivalent of binary 1100 ?, The decimal equivalent o...

The decimal equivalent of (1100) 2   is ? Ans. (1100) 2 = (12) 10

Determine the uses of memory blocks, Determine the Uses of memory blocks. ...

Determine the Uses of memory blocks. Not as common a technique though something to consider. As Verilog has a very convenient syntax for declaring and loading memories, you ca

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