Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. What do you mean by Dial Pulses?
Dial Pulses: Dial pulsing (many times known as rotary dial pulsing) is the method originally used to transfer digits from a telephone set to local switch. Pulsing digits from a rotary switch began soon after invention of the automatic switching machines. The idea of dial pulsing is quite simple and is depicted in figure. Process begins when telephone set is lifted off hook, completing a path for current through local loop. When switching machine detects off-hook condition, it responds with dial tone. After hearing the dial tone, subscriber begins dial pulsing digits by rotating a mechanical dialling mechanism and then letting it returns to its rest position. As rotary switch returns to its rest position, it outputs a series of dial pulses corresponding to digit dialled.
Whenever a digit is dialled, loop circuit alternately opens (breaks) and closes (makes) a prescribed number of times. Number of switch make/break sequences corresponds to digit dialled (that is the digit 3 produces three switch openings and three switch closers).
Dial pulses take place at 10 make/break cycles per second (which is a period of 100 ms per pulse cycle). For illustration digit 5 corresponds to five make/break cycles lasting a total of 500ms. Switching machine senses and counts the number make/break pairs in sequence.
Break time is nominally 61 ms and make time is nominally 39ms. Digits are separated by idle period of 300 ms called inter digit time. It is important that switching machine recognize the inter digit time so that it can separate pulses from successive digits. Central office switch incorporates a special timeout circuit to ensure that break part of dialling pulse isn't misinterpreted as phone being returned to its on-hook (idle) condition.
Mini Computers Larger computer more computing power having capability to address more memory and more speed than microcomputer called minicomputer. These computers
Question 1 With the help of energy band diagram differentiate between Insulators, semiconductors and metals Question 2 Explain the operation of RC phase shift oscillator
Define pipelining? In 8086, to speedup the implementation of program, the instructions fetching and implementation of instructions are overlapped each other. This method is kno
Q. Comment brie?y on the following: (a) Why are waveguides not used at low frequencies? (b) Why are open-wire lines not generally used as guiding structures at very high freq
bias compensation techniques for ac and dc characteristics
Explain Intrinsic Semiconductor. Intrinsic Semiconductor: An extremely pure semiconductor is termed as intrinsic semiconductor. But at absolute zero temperature its valence b
Determine the total energy loss: Two capacitors C 1 = 50 μF and C 2 = 100 μF are connected in parallel across 250 V supply. Determine the total energy loss. Figure
The aim of the research paper is to design a crossover circuit for loudspeaker that will be used with a 2-way speaker. Circuit consists of the resistors, capacitors and operational
Definition of bias compensation.
Q. Consider the circuit of Figure in which the switch S has been open for a long time and is closed at t = 0. Determine v C (t) for t ≥ 0.
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd