Explain time multiplexed space switching, Electrical Engineering

Assignment Help:

Explain time multiplexed space switching? With a neat diagram illustrate its operation.

Ans:

Time division switches where an outlet or an inlet corresponded to a single subscriber line with one speech sample appearing every 125 µs on the line. Such switches are used in local exchanges. We now consider switches which are essential in transit exchanges. Here inlets and outlets are trunks that carry time division multiplexed data streams. We call these switches time multiplexed switches. A time multiplexed time division space switch is displayed in Figure. There are N incoming trunks and N outgoing trunks, each one carrying a time division multiplexed stream of M samples per frame. Every frame is of 125-µs time duration. In one frame time, a total of MN speech samples have to be switched. One sample duration, 125/M microseconds, is generally referred to as a time slot. In one time slot, N samples are switched. Figureillustrates an output-controlled switch. Output is cyclically scanned. There is a 1-to-M relationship between outlets and control memory locations, it implies that there are M locations in the control memory corresponding to each outlet.

468_Explain time multiplexed space switching.png

Control memory has MN words. If we view control memory as M blocks of N words each, a location address can be specified in a two dimensional form (i,j)where i is the block address and j is the word within the block. We have 1< i


Related Discussions:- Explain time multiplexed space switching

Find the minimum sum of products, Given that , f(a,b,c,d,e) = Σm (6,7,9,11,...

Given that , f(a,b,c,d,e) = Σm (6,7,9,11,12,13,16,17,18,20,21,23,25,28) using a Karnaugh map. (i) Find the essential prime implicants (ii) Find the minimum sum of product

Discuss the disadvantages of an rc coupled amplifier, Q. Discuss the disadv...

Q. Discuss the disadvantages of an RC coupled amplifier? RC coupled amplifiers have a few disadvantages. The resistors use dc power and so the amplifier has low efficiency. The

#titleclipper diode.., Ask quedisadvantages stion #Minimum 100 words accept...

Ask quedisadvantages stion #Minimum 100 words accepted#

Evaluate the current flowing in the direction from b to a, Q A beam contain...

Q A beam containing two types of charged particles is moving from A to B. Particles of type I with charge +3q, and those of type II with charge -2q (where -q is the charge of an el

Electrical machine, transformer voltage induced in armatur of ac commentato...

transformer voltage induced in armatur of ac commentator machin in case tha field flux in sinosoidal?..

Automotive power-assisted steering system, In terms of negative feedback, t...

In terms of negative feedback, there exists an analogy between the operational amplifier and the power-steering mechanism of an automobile. The hydraulic pump is analogous to the p

What do you mean by double word, Q. What do you mean by Double Word? A ...

Q. What do you mean by Double Word? A double word is precisely what its name implies, two words. Thus, a double word quantity is 32 bits. Logically, this double word can be div

Spread time - power semiconductor devices , Spread Time (t s ) During  ...

Spread Time (t s ) During  spread time anode  voltage  falls from 10% I a  to the  on state  voltage  drop  and anode  current  rises  from 90% I a   to final  value  of anode

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