Telecommunication Switching Systems Automatic Switching system Udhay Prakash Lecturer, Dept. Of ECE, JNTUH CEH
[email protected]
Communication • Mutual exchange of understandable information, may or may not securely. • Communication System has three parts: – Transmitter – Channel (medium) – Receiver
Telecommunication • Communication beyond the usual range of vocal or visual Communication. • Tele (distant), communication (exchange of information). • Information- Some thing that has (or with further modification, may have) some meaning or sense.
Telecommunication Chronicle Smoke signals based Telecommunication: With a system of alphabetical smoke signals and some smoke signal equipment (such as a blanket).
Telecommunication Chronicle Telegraph: Message transmission in terms of two symbols(. and _)
Telecommunication Chronicle Telephone:
Graham Bell’s Invention
Telecom Systems • The basic problem – Telephones introduced in late-1800’s. – Initially each telephone was directly connected to another site. • This led to an explosion of direct connections (n*(n-1)/2)
Network Topologies
Folded & Non-folded Networks
Switching system classification
Switching System Functionalities
Components of switching system
References Viswanathan, Telecommunication switching systems, PHI. • Roger L. Freeman, Fundamentals of Telecommunications, 2e, Wiley-interscience, ISBN 0471-71045-8. • Thyagarajan
