Synchronous Transmission Networks

This course explains the principles of synchronous transmission and describes the role of the components of a transmission network. 

Synchronous Transmission Networks

Course Description

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.

Course Outcomes:
  • 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
Course Details:

Target Audience

This course is designed for technicians and engineers involved in the design, commissioning and maintenance of synchronous transmission networks.

Access Timeframe

1 Year


An understanding of the characteristics of digital signals. It is recommended that the PTT online courses Analogue and Digital Signals and Signal Impairments are studied before attempting this Synchronous Transmission Networks course.
Certificate Info:

Type of Certification

Certificate of Completion

Format of Certification


Method of Obtaining Certification

Upon successful completion of the course, the learner can download a certificate.

Technical Requirements

To access the course, a PC running a browser such as Internet Explorer 6 or above, Firefox 2 or above, Google Chrome or Safari is required. The PC should have Internet access and be running Flash version 8 or above. A screen resolution of at least 1024x768 is necessary.


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