This course by PTT introduces the technologies and techniques employed by the synchronous transmission networks employed by many telecoms providers in their International, national and regional networks.
The course begins by explaining the principles of time division multiplexing (TDM) and the features and facilities of TDM equipment. The need for timing control in a TDM network is discussed with reference to the effects of variations in timing. The structure and components of a timing distribution network are described with reference to stable timing sources.
- Describe the principles of Time Division Multiplexing (TDM)
- Describe the role and and operation of a primary multiplexer with reference to the 2 Mbit/s frame structure
- Explain the principles and use of timeslot interchange
- Describe the role and basic operation of different types of synchronous equipment inc. terminal multiplexers, drop and insert multiplexers and cross-connect equipment
- Explain the need for timing control in a synchronous transmission network
- Define jitter and explain causes of jitter and methods of minimising the impairment
- Describe the hierarchical structure of a timing distribution network
- Describe the roles of, and relationship between, primary and secondary timing sources with reference to their respective timing stabilities