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Q. What are the supplementary services?
new services are called supplementary services and some of the prominent ones are as below:Category 1:
Category 2:
Category 3:
Category 4:
A subscriber issues commands to an exchange to deactivate or activate a service, record or clear data in subscriber line data area or solicit an acknowledgement from exchange. As an instance, a user can disable or enable STD facility on his line by using a command. A command may have or may not have data associated with it. Number of digits in the data, when present, can vary depending upon the command. Consequently, subscriber commands are designed to be of variable length necessitating use of an end-of-command symbol.
Using Bode plot calculate (a) Phase margin (b) Gain margin (c) Stability of closed loop system. The open transfer function of the system is t=30/(s+2)/(s+3)Using Bode plot calcula
Requirements of equalizer connection
An audiomessage is band-limited to 15 kHz, sampled at twice the Nyquist rate, and encoded by a 12-bit natural binary code that corresponds to Lb = 212 = 4096 levels, all of which s
Electromechanical Meters Electromechanical energy meters are based on the Ferraris Principle (see note in the margin). The working of these meters is explained. Working o
Define the assign nodel voltage
Q. Briefly explain Automotive Ignition System? Ignition systems in automobiles have been designed as a straightforward application of electrical transients. Figure shows a simp
Q. Illustrate Differential phase-shift keying? In order to eliminate the need of a local carrier, DPSK has been developed in which the receiver uses the received signal to act
A three-phase, 2200-V, 60-Hz, delta-connected, squirrel-cage induction motor, when started at full rated voltage, takes a starting current of 693 A from the line and develops a sta
Metallic Bonding In metals, the outer shell is filled through no more than three electrons (loosely bound and given up easily) => great chemical activity and very high elec
Derive the mathematical 3-D heat conduction equation in Spherical Coordinates? A furnace is made up of three layers of thicknesses 250 mm, 150 mm nad 100 mm with thermal conduct
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