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CPU Based Exchange: In centralized control, all control equipment is replaced by a single processor which should be quite powerful. It should be capable of processing 10 to 100 calls per second, depending on load on the system and concurrently performing many other ancillary tasks. A typical control configuration of an ESS using centralized SPC is demonstrated in Figure. A centralized SPC configuration can use more than one processor for redundancy purposes. Though there are a large number of services that can be offered by CPU based exchange, they can be grouped under four wide categories.
1. Services associated with calling subscribers and designed to decrease time spent on dialling and number of dialling errors.
2. Services associated with called subscriber and designed to increase call completion rate.
3. Services involving more than two parties.
4. Miscellaneous services.
proof of Norton theorem
Q. The block diagram of Figure represents a multi loop control system. (a) Determine the transfer function C(s)/R(s). (b) For G 2 G 3 H 2 = 1, evaluate C(s)/R(s).
Q. Show Step-motor control system? Figure illustrates a system in which the prime mover used in the disk-drive system is a step motor driven by pulse commands. In response to e
what are the classifications of fixed resistor?explain
Alternate Representation for Complex Poles Complex poles can be combined to yield a quadratic term in the partial fraction expansion. The representation may best be illustrated
a) Write short notes on part feeding devices and transfer mechanism. b) Explain with example automation for machining operation with relevant diagrams. c) discuss different p
Q. An interesting application of the SRFF is as a buffer in overcoming contact bounce in mechanical switches. These switches, of the toggle type, may be used to change the logic st
Compute the total capacitance with parallel connection: Three capacitors C 1 , C 2 and C 3 contain capacitance 20 μf, 15 μf, 30 μf, respectively. compute: 1. Charge on ea
Parallel Operation of Interconnected Synchronous Generators In order to assure continuity of the power supplywithin prescribed limits of frequency and voltage at all the load p
scientific method in operations research
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