What is time switches, Electrical Engineering

Assignment Help:

Q. What is Time Switches?

Principle of a time switch is displayed in Figure. It connects an incoming n channel PCM highway to an outgoing n channel PCM highway. As any incoming channel can be connected to any outgoing channel, its equivalent to space division cross point matrix with n incoming and n outgoing trunks, as displayed in Figure. Time-slot interchange is carried out by means of two stores, each having a storage address for every channel of PCM frame. The speech store contains the data of each of the incoming time-slots (that is its speech sample) at a corresponding address. Each address of connection store corresponds to a time slot on outgoing highway. It comprises the number of time-slot on the incoming highways whose sample is to be transmitted in that outgoing time-slots. Information is read into speech store cyclically in synchronism with the incoming PCM systems; though, random access read out is used. Connection store has cyclic read out however writing in is non-cyclic. To establish a connection, number (X of the time-slot of an incoming channel is written into the connection store at the address corresponding to the selected outgoing channel (Y).During each cyclic scan of speech store, incoming PCM sample from channel X is written into address X. During each cyclic scan of connection store, number X is read out at the beginning of time-slot Y. This is decoded to select address X of speech store, whose contents are read out and sent over the outgoing highway.

1889_What is Time Switches.png


Related Discussions:- What is time switches

Fundamental of metal casting, Fundamental of Metal Casting: Fundament...

Fundamental of Metal Casting: Fundamental of Metal Casting : Casting process is based on the property of a liquid to take up the shape of vessel containing it. Molten metal

Show balanced three-phase loads, Q. Show Balanced three-phase loads? Th...

Q. Show Balanced three-phase loads? Three-phase loads can be connected in either wye (also known as star or Y) or delta (otherwise known as mesh or ). If the load impedances i

What is the size of ports in 8255, What is the size of ports in 8255? P...

What is the size of ports in 8255? Port-A : 8-bits Port-CU : 4-bits Port-B : 8-bits Port-CL : 4-bits

Estimate the required bandwidth using Carson''s rule, A 10-kHz tone is used...

A 10-kHz tone is used to frequency modulate a carrier; the peak deviation is 75 kHz. Use Carson''s rule to estimate the bandwidth.

What do you mean by phase sequence, Q. What do you mean by Phase Sequence? ...

Q. What do you mean by Phase Sequence? It is standard practice in the United States to designate the phase A-B-C such that under balanced conditions the voltage and current in

Define cables - generation and absorption of reactive power, Define Cables ...

Define Cables - Generation and Absorption of Reactive Power? It is well known that the shunt capacitance of the cable is very large as compared to that of an overhead line. Thi

Determine gold and silver are which type of materials, Gold and silver are ...

Gold and silver are (A) Dielectric materials (B) Low resistivity conducting materials. (C) Magnetic materials. (D) Insulating materials. Ans: Gold and si

What is session layer, Q. What is Session Layer? Session layer is used ...

Q. What is Session Layer? Session layer is used to allow users to identify themselves when waiting access to the network. This is concerned with setting up and sustaining an op

Explain multiplexing systems, Q. Explain Multiplexing Systems? A multip...

Q. Explain Multiplexing Systems? A multiplexing system is one in which two or more signals are transmitted jointly over the same transmission channel. There are two commonly us

Dc machines, explain dynamically induced emf and derive expression for it

explain dynamically induced emf and derive expression for it

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