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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.
What are the kinds of transformations? Illustrate each with the help of homogeneous matrix form in 3-D.
For Sign Flag CP ( Call on plus ) CM (Call on minus ) Instruction CP call the subroutine from the specified memory location if sign flag is not set or reset( S=0)
need calculation
Give the properties of PVC. PVC- It is acquired from polymerisation of hydrogen chloride and acetylene in the presence of a catalyst as peroxides at about 50 0 C. Properties
define all the symbols with their unit
Q. What is the principle of operation of an integrating circuit? The RC integrator is typically a series RC circuit that uses the capacitor to develop its output. Since voltage
Q. Open-loop control system? An open-loop system is one in which the control action is independent of the output or desired result, whereas a closed-loop (feedback) system is o
Q. In the non inverting summing amplifier of Figure, let R d = 1k and M = 6. Find R f so that v =
Q. Antinoise Systems — Noise Cancellation? Traditionally sound-absorbing materials have been used quite effectively to reduce noise levels in aircraft, amphitheaters, and other
Q. Two balanced, wye-connected, three-phase loads are in parallel across a balanced, three - phase 60- Hz, 208-Vsupply. The first load takes 12 kWat 0.6 power factor lagging, and t
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