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Transmission Networks Course description: The course is for both computer network and telecommunications specialists. The course studies three generation of the transmission networks: Plesiochronous Digital Networks (PDH), Synchronous Digital Hierarchy (SDH), and Dense Wavelength Division Multiplexing (DWDM). Courses to be taken before this course: Introduction to Data Networks, Chapters of the book on which this course can be based: Almost all material of Chapter 3 ‘Packet and circuit switching’ (except for the section ‘Packet switching in shared medium networks’) could be a good starting point of the course, which can help students to understand the difference between circuit-switching technique used in transmission networks and packet-switched technique used in computer networks. Chapter 11 ‘Transmission Networks’ is the basis of the course. Before using the Chapter 11 material, it would be useful to explain students the basics of data links (Chapter 8), encoding and data multiplexing methods (Chapter 9). When teaching multiplexing methods the emphasis should be on Time Division Multiplexing (TDM) and Wave Division Multiplexing (WDM).