html{display:none} eCOM 201: Multiplexing and TDM Communications | Schweitzer Engineering Laboratories

eCOM 201: Multiplexing and TDM Communications

CEUs: 0.8
PDHs: 8

Course Base Fees: $440 USD*
* Plus Applicable Tax




Dependable communications for critical infrastructure are crucial when you are deploying fiber networks. Time-division multiplexing (TDM) offers proven and reliable time-deterministic channels for mission-critical data, such as protection and control. TDM multiplexers can be deployed anywhere and are ideal for private networks where you have complete control to engineer each application for optimal performance.

In this SONET and multiplexing fundamentals course, you will learn about the concepts and considerations that are involved in designing a SONET-based network. This course will prepare you to implement multiplexer network applications, and during this course, you will design a realistic multinode SONET-based OC-48 network. It will also provide a concise introduction to the concepts that will be applied in APP ICON.

This self-paced virtual course combines virtual training and exercises with opportunities to connect with instructors when you have questions or need further guidance. eLearning licenses will expire one year from the purchase date.

The duration of the self-paced eCOM 201 course is 8 hours. In all, there are six topics/chapters and five exercises.

Continuing education units (CEUs) or professional development hours (PDHs) will be available once the final test is passed and the evaluation has been completed (or a two-week expiration period has passed). A link to the certificate will appear next to the course once both pieces are complete.



This course is designed for utility engineers and technicians who specify, design, operate, or maintain utility networks, including utility protection engineers, automation engineers, integration engineers, and novice communications engineers and managers.


  • Introduction to Communications Networks
  • Fiber-Optic Transmission Principles
  • Introduction to Multiplexing
  • SONET Fundamentals
  • DACS Fundamentals
  • SONET Network Design (with exercise)

Course Outcomes

At the conclusion of this course, students can:

  • Apply the basics of SONET-based communications technologies to a network design.
  • Identify the principles of fiber-optic-based transmission and media.
  • Identify multiplexing considerations and applications.
  • Describe the fundamentals and importance of TDM.
  • Design a multinode SONET-based network.
  • Assign network traffic based on circuit requirements.

Student Background and Knowledge

Before you attend this class, we recommend that you have:

  • Familiarity with utility network requirements.
  • An understanding of communications theory.
  • A basic understanding of utility power systems.

Available Courses


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Course Preparation

A calculator with basic math functions is optional.

Additional information is on the Course Policies and FAQ pages.