Explain time multiplexed space switching, Electrical Engineering

Assignment Help:

Explain time multiplexed space switching? With a neat diagram illustrate its operation.

Ans:

Time division switches where an outlet or an inlet corresponded to a single subscriber line with one speech sample appearing every 125 µs on the line. Such switches are used in local exchanges. We now consider switches which are essential in transit exchanges. Here inlets and outlets are trunks that carry time division multiplexed data streams. We call these switches time multiplexed switches. A time multiplexed time division space switch is displayed in Figure. There are N incoming trunks and N outgoing trunks, each one carrying a time division multiplexed stream of M samples per frame. Every frame is of 125-µs time duration. In one frame time, a total of MN speech samples have to be switched. One sample duration, 125/M microseconds, is generally referred to as a time slot. In one time slot, N samples are switched. Figureillustrates an output-controlled switch. Output is cyclically scanned. There is a 1-to-M relationship between outlets and control memory locations, it implies that there are M locations in the control memory corresponding to each outlet.

468_Explain time multiplexed space switching.png

Control memory has MN words. If we view control memory as M blocks of N words each, a location address can be specified in a two dimensional form (i,j)where i is the block address and j is the word within the block. We have 1< i


Related Discussions:- Explain time multiplexed space switching

add instruction, ADD Instruction This  instruction use to add  content...

ADD Instruction This  instruction use to add  contents of any  register or memory  location with the  contents of accumulator. There are two  formats for ADD  instruction to ad

Designing a switching system, Q. Demonstrate how finite state machine model...

Q. Demonstrate how finite state machine model helps in designing a switching system and give a typical illustration. Ans: Switching systemessentially belongs to class of fi

What does the eu do, Execution Unit receives program instruction codes and ...

Execution Unit receives program instruction codes and data from BIU, implements these instructions and store the result in general registers.

Management of Initiatives and Focus - KPI, Management of Initiatives and Fo...

Management of Initiatives and Focus - KPI In this era of fierce competition and to have the competitive edge, it is significant to conserve the material and human resources th

Explain the purpose of the i/o instructions in and out, Explain the purpose...

Explain the purpose of the I/O instructions IN and OUT. The IN instruction is used to move data from an I/O port into the accumulator. The OUT instruction is used to move d

OSCILLATORS, DESIGN A WIEN OSCILLATOR THAT OSCILLATE AT 25KHZ

DESIGN A WIEN OSCILLATOR THAT OSCILLATE AT 25KHZ

Calculate sending-end voltage at 0.9 pf lagging, A three-phase, 34.5-kV, 60...

A three-phase, 34.5-kV, 60-Hz, 40-km transmission line has a per-phase series impedance of 0.2+j0.5/km. The load at the receiving end absorbs 10 MVA at 33 kV. Calculate the follow

Compare the percent error of both meters, Q. Error speci?cations on a 10-A ...

Q. Error speci?cations on a 10-A digital ammeter are given as 0.07% of the reading, 0.05% of full scale, 0.005% of the reading per degree Celsius, and 0.002% of full scale per degr

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