Describe the time division switching, Electrical Engineering

Assignment Help:

Q. Describe the time division switching?

Ans:

Space and Time Switching:

Space Switches: Connections can be made between outgoing and incoming PCM highways by means of a cross point matrix of the form displayed in Figure. Thoughdifferent channels of an incoming PCM frame may need to be switched by various cross points in order to reach different destinations. The cross point is hence a two-input AND gate. One input is connected to the incoming PCM highway and the other to a connection store that produce a pulse at the required instant. A group of cross points gates can be implemented as an integrated circuit, for instance by using a multiplexer chip.

2195_Describe the time division switching.png

Figure demonstrates a space switch with k incoming and m outgoing PCM highways, each one carrying n channels. Connections store for every column of cross points is a memory with an address location for every time-slot that stores number of the cross points to be operated in that time slot. This number is written into address by controlling processor in order to setup connection. Numbers are read out cyclically, in synchronism with incoming PCM frame. In every time slot, number stored at the corresponding store address is read out and decoding logic converts this into a pulse or a single lead to operate relevant cross point.

As a cross point can make a different connection in each of the n time-slots, its equivalent to n cross points in a space division network. Complete space switch is hence equivalent to n separate k x m switches in a space division switching network.


Related Discussions:- Describe the time division switching

Explain negative test cases for testing mobile phones, Negative test cases...

Negative test cases for testing mobile phones are: 1.taking out the SIM card and made a call  2. by invalid phone number 3. Made a call at which there is no tower signa

Electrical starter motor, ELECTRICAL STARTER MOTOR This usually consist...

ELECTRICAL STARTER MOTOR This usually consists of a heavy duty, compound wound, DC motor, which draws its electrical supply from an external source. The motor works in conjunc

Digital control system, block diagram of digital control system and explain...

block diagram of digital control system and explain each block

Microwave components and devices, explain how microwave intergrated circuit...

explain how microwave intergrated circuits differ from conventional intergrated circuit stating the technologies

Systemic requirements - gis technology, Systemic Requirements: A robu...

Systemic Requirements: A robust GIS solution for a distribution utility comprises the subsequent: GIS application and database software should be OGC (Open Geospatial

What minimum value of coupling resistance, Q. It is desired to have a sag o...

Q. It is desired to have a sag or tilt of no more than 10% when a 50Hz square wave is impressed on an amplifier stage. The output circuit resistance is Rv=1K. What minimum value of

What are the currents in the high-voltage, Q. A transformer is rated 10 kVA...

Q. A transformer is rated 10 kVA, 220:110 V (rms). Consider it an ideal transformer. (a) Compute the turns ratio and the winding current ratings. (b) If a 2-load resistance

3-phase 180 degree mode vsi , 3-phase 180 0 mode VSI In 1800 mode VSI...

3-phase 180 0 mode VSI In 1800 mode VSI  each thyristor  conduct  for 1800 and two  thyristor  are fired  at 600 interval. For  example  if thyristor  T1  is fired at 00 then

Matlab, what is the future scope of matlab in india?

what is the future scope of matlab in india?

Determine the capacitor voltage, Q. In an RLC series circuit excited by a v...

Q. In an RLC series circuit excited by a voltage source v(t), for R = 10 , L = 1 H, and C = 0.1F, determine v(t) if the capacitor voltage vC(t) = 5e -10t V.

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