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

Thevenin equivalent circuit, The circuit below will be most efficiently ana...

The circuit below will be most efficiently analyzed by obtaining the Thevenin equivalent circuit for the circuit to the left of the points (a-b) on the schematic. The capacitor is

Insulation resistance, how can we increase insulation resistance of sheet

how can we increase insulation resistance of sheet

Give an introductive notes about fet amplifier, Q. Give an introductive not...

Q. Give an introductive notes about FET amplifier ?  The small signal models for the common source FET can be used for analyzing the three basic FET amplifier configurations: (

Tone used in stronger telephony, Q. Tone used in stronger telephony? Di...

Q. Tone used in stronger telephony? Dial Tone: This tone is used to specify that exchange is ready to accept dialled digits from subscriber. Subscriber must start dialling only

Compute the real power inductive load, Q. A 60-Hz, 440-V, three-phase syste...

Q. A 60-Hz, 440-V, three-phase system feeds two balanced wye-connected loads in parallel. One load has a per-phase impedance of 8 + j3  and the other 4 - j1 . Compute the real po

Jfet amplifier, i want to know the all the three jfet in present and future...

i want to know the all the three jfet in present and future use and desing for each component

Superposition principle of linear modulation method, Q. Let m 1 (t) and m 2...

Q. Let m 1 (t) and m 2 (t) be two message signals, and let u 1 (t) and u 2 (t) be the corresponding modulated versions. (a) When the combined message signal m 1 (t) + m 2 (t) DS

Basic working principle of laser beam machining process, Define the basic w...

Define the basic working principle , process characteristics,advantages, disadvantages and application of Laser Beam Machining Process.

How oscillations start up in an oscillator, Q. How oscillations start up in...

Q. How oscillations start up in an oscillator?  The noise voltage produced due to the random motion of electrons in resistors or in active devices provides the starting voltage

What is the working of sensor in robotics, (a) What is the working of senso...

(a) What is the working of sensor in Robotics ? (b) Define the following : (i) Proximity Sensor (ii) Tactile Sensors (iii) Optical Sensor. (c) What is an End Effecto

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