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

Explain about stored program control, Q. Explain about Stored Program Contr...

Q. Explain about Stored Program Control? Stored Program Control:   In centralized control, all control equipment is replaced by a single processor which should be quite powerf

Can you explain about slew rate, Q. Can you explain about Slew Rate? Sl...

Q. Can you explain about Slew Rate? Slew (or slewing) rate is a measure of how fast the output voltage can change. It is given by the maximum value of dvo/dt , which is normall

Direct current charging and discharging circuit, 1. The circuit shown belo...

1. The circuit shown below is a DC charging and discharging circuit. a. At t = 0 sec, switch S1 is thrown to position 1 ("pos1"). Write the mathematical expressions for V

Plc - programmable logical controller , PLC ( Programmable Logical  Contr...

PLC ( Programmable Logical  Controller ) PLC  stand for programmable logical  controller.  PLC   is an  industrial computer  used to monitor inputs and depending upon  their  m

Blanking circuit, Blanking circuit: The saw tooth sweep voltage applied to...

Blanking circuit: The saw tooth sweep voltage applied to the X places moves beam across the CRT tube in a straight horizontal line from left to right during the sweep or trace tim

Working principle of ultrasonic machining, Explain the basic working princi...

Explain the basic working principle of ultrasonic machining with the help of diagram. What are the different kinds of tool materials explain, tool holders are used in ultrasonic

Power of the signal transmitted by powerful cell phones, What is the power ...

What is the power of the signal transmitted by powerful cell phones? Ans) The powerful cell phones can transfer a signal of 3 watts.

Find the antenna temperature, Q. If an antenna has an available noise power...

Q. If an antenna has an available noise power of 1.6 × 10 -15 W in a 1-MHz bandwidth, find the antenna temperature.

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