Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. Explain working of Public Switched Telephone Network?
Public Switched Telephone Network (PSTN) accommodates two kinds of subscribers: private andpublic. Subscribers to private sector are customers who lease equipment, transmission media (facilities) and service from telephone companies on a permanent basis. Leased circuits are configured and designed for their use only and are generally referred to as private line circuits or dedicated line circuits. For instance, large banks don't wish to share their communication network with other users, however it's not effective for them to create their own networks. So banks facilities and lease equipment from public telephone companies and basically operate a private telephone or data network within PSTN. Public telephones companies are sometime called providers because they lease equipment and provide service to other organizations, private companies and government agencies. Most wide area networks (WANs) and metropolitan area networks (MANs) utilize private line data circuits and one or more service provider. Subscribers to public sector of PSTN shareequipment and facilities which are available to all the public subscribers to network. This equipment is appropriately termed as common usage equipment, which includes telephone switches andtransmission facilities. Anyone with a telephone number is a subscriber to public sector of PSTN. As subscribers to public network are interconnected only temporarily through switches, network is often appropriately known as the public switched telephone network (PSTN) and sometimes simply as dial-up network. It is likely to interconnect telephones and modems with one another over great distance in fraction of a second by an elaborate network comprised of central offices, cables (optical and metallic), switches and wireless radio systems which are connected by routing nodes (a node is a switching point). When someone talks about public switched telephone network, they referring to combination of switches and lines that from a system of electrical routes through the network.
Q. An n-channel enhancement MOSFET operates in the active region with very large V A , v GS = 6V, V = 4 V, and i = 1 mA. Calculate K.
Q. Explain Current-to-Current Amplifier ? The circuit given in Figure is to amplify a current fed to the input of the op amp. Applying KCL at Y, i 1 + i S = i o S
Explain the Third Group of 32 ASCII Character? The third group of 32 ASCII characters is set aside for the upper case alphabetic characters. The ASCII codes for the characters
Customer Indexing: Customer indexing (CI) is a method for enumerating the total number of consumers in a utility and tagging them to their respective poles, transformers and f
For the RC phase-shift oscillator if c=1pF and R=10K determine the value of Rf
Q. Single-axis autopilot control system of an aircraft? Figure (a) shows the block diagram of a simplified single-axis (pitch, yaw, or roll) autopilot control systemwith digita
Charge Carriers in Semiconductors In a metal, the atoms are imbedded in a "sea" of free electrons, and these electrons can move as a group under the influence of an
Field effect transistor: Primarily difference between bit and jet is that bit transistor is a current controlled device while jet is a voltage controlled device. Is a direct
Q. Basic elements of a digital communication system? Figure illustrates the basic elements of a digital communication system. For each function in the transmitting station, th
what is p-n junction and how its work
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd