Draw a 100 line exchange, Electrical Engineering

Assignment Help:

Q. Draw a 100 line exchange using two motion selectors and elucidate, how switching takes place in it.

Ans:

In a 100 line exchange, every subscriber is assigned a 2 digit telephone number between 00 and 99. This number identifies group selector value and final selector values. As the dialing of telephone number is done the corresponding group selector and then final selector levels are switched. Desired schematic for 100 lines exchange with 24 two motion selectors is shown in Figure.

1312_Draw a 100 line exchange.png

In this case, 24 simultaneous calls can be put through switch. Generally a 24-outlet Uni-selector is used as a selector hunter. Every one of the 24 outlets is connected to one two-motion selector. So a subscriber has access to all the 24 two-motion selectors in system. Corresponding outlets of all the selector hunters are commoned and hence all subscribers have access to all the two-motion selectors. This scheme is displayed in Figure. Call establishment in this scheme takes place in two steps. Firstly, when subscriber lifts his receiver handset, his Uni-selector hunts through contact positions and seizes a free two-motion selector. At the subsequent step, two-motion selector responds to dial pulses for appropriate connection.


Related Discussions:- Draw a 100 line exchange

Basic building block of a block diagram, The mathematical relationships of ...

The mathematical relationships of control systems are usually represented by block diagrams, which show the role of various components of the system and the interaction of variable

Explain buffer storage, Discuss the layout configuration of FMS with neat a...

Discuss the layout configuration of FMS with neat and clean diagram? Write the disadvantages and advantages of FMS? Write the short note on following: a) Applications of FMS

Power distribution, 1.  Establish importance of Distribution Planning with ...

1.  Establish importance of Distribution Planning with help of suitable example.     2.  Explain different distribution planning methods.       3.Explain the six level interv

Find the initial current when switch is closed - capacitor, 1. In the circ...

1. In the circuit shown below, the capacitor initially has a voltage across it 4 Volts (at t = 0). a. Write down the expression for V C (t) when the switch is closed. b. Wr

Reverse recovery characteristics, Reverse Recovery Characteristics At t...

Reverse Recovery Characteristics At the end of forward  conduction in diode  reverse current  flows for  a short  time. The  device  doesn't  attain its full blocking  capabili

What are the different types of mosfet transistors, Q. What are the differe...

Q. What are the different types of MOSFET transistors ? The metal-oxide semiconductor field-effect transistor (MOSFET) is a three-terminal active device which has many applicat

Electric circuits, How to design a single phase distribution circuit from a...

How to design a single phase distribution circuit from a supply point to a load?

Variable capacitors, how can I simulate air variable capacitors in cst simu...

how can I simulate air variable capacitors in cst simulator?

Linear and digital ics, write down the application of shift register and ex...

write down the application of shift register and explain it.

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