Communication Systems
Lecturer: M.E. P.T.A. Quang
Contents
Chapter 1: Introductory Concepts
Chapter 2: QoS
Chapter 3: Transmission and switching
Chapter 4: Digital networks
Chapter 5: Signaling
Chapter 6: PSTN
Chapter 7: VoIP
Chapter 8: Mobile communication
Chapter 9: Satellite communication
Chapter 10: Fiber-optic communication
Introductory Topics in Telecommunication
End-users, nodes, and connectivities
Telephone numbering and routing
Tandem switches
Hierarchical structure
Busy hour and grade of services
Simplex, half-duplex, and full duplex
One-way and two-way circuit
Double seizure
Supervision signals
Network topologies
Variations in traffic flow
End users, nodes, and connectivities
End-users: inputs to the network / recipients of network
outputs
Node: a point or junction in a transmission system where lines
and trunks meet. (switching function)
Connectivity: links an end-user to a node, and from there
possibly through other nodes to some final end-user
destination
Telephone numbering and routing:
Every subscriber has an unique number related to physical
location.
Call 447-8765 Route: look up trunk to 447
Subscriber loop
trunk
