Telephony Background: An overview of telephone networks - Transmission system
- Basic switching system – Signaling - Echo cancellation - Working principles of
telephone - DC (pulse) and DTMF (tone) – Signaling - Digital Switching Systems.
Traffic Analysis: Traffic characterization - Loss systems - Network blocking
probabilities - Delay systems (queuing system) - Queues in tandem.
Switching: Single stage – Grading - Progressive grading - Traffic capacity of
grading – Applications - Link systems. Space/Time Division Switching: Space switch
- Time switch and their design - Hybrid switches - Concentrator and switching
components - PBX switches - Digital cross connect - Time division switching:
Space and time division switching - General space switches - Time switches -
Time division switching networks - Basic networks - Bidirectional pass - Complex
switching networks – Concentrators - PBX switches - Digital cross connect units
- Grades of services of time division switching networks.
Switching Control: Call processing - Signal exchanges - Signal operations - Common
control – Reliability - Availability and security - Network synchronization - Network
control network management. Digital Network and Signaling: Integrated service
digital network (ISDN) - ISDN overview - ISDN interfaces and functions - User
network interface - ISDN protocol architecture. Signaling System Number 7 (SS7):
SS7 architecture signaling date link level - signaling link level - Network level -
Signaling connection control part.