Communication Switching Systems

Pre-Requisite : EC305
Contact Hours and Credits : ( 3 -0- 0 ) 3

Objective : 

To understand the working principles of switching systems from manual and electromechanical systems to stored program control systems.

Topics Covered :

Basic elements of communication network. Switching systems. Signaling and signaling functions.

Digital telephone network.T1 Carrier systems. TDM hierarchy. Data under voice. Digital switching. Echo cancellers.

Synchronous versus asynchronous transmission. Line coding .Error performance. TDM. TDM loops and rings.

Space and time divided switches.  Multistage switches. Design examples.  Path finding. Switching matrix control. Digital time division switch. Time Space switching. Time Space Time switching. Digital Switching in analog environment.

Timing recovery. Jitter. Network synchronization. Digital subscriber access-ISDN network. ADSL. Traffic analysis.

Course Outcomes :

Students are able to

  • CO1: Explain the working principle of switching systems involved in telecommunication switching
  • CO2: Assess the need for voice digitization and T Carrier systems
  • CO3: Compare and analyze Line coding techniques and examine its error performance
  • CO4: Design multi stage switching structures involving time and space switching stages
  • CO5: Analyze basic telecommunication traffic theory

Text Books:

  • J.C. Bellamy, Digital Telephony, (3/e), Wiley, 2000.
  • E. Keiser & E. Strange, Digital Telephony and Network Integration, (2/e), Van Nostrand, 1995.

Reference Books:

  • Thiagarajan Viswanathan, Telecommunication Switching Systems and Networks, PHI, 2006.
  • J.E. Flood, Telecommunications Switching, Traffic and Networks, Prentice Hall, 1995.
  • M.T. Hills ,Telecommunication Switching Principles, London : Allen and Unwin, 1979.