Telecommunications I TELC 9000 Email to a Friend Through our Telecommunications I course, acquire an understanding of and training in the process required to connect a telephone line from the central office to the customer. Learn about telephone history, phone mechanics (such as dial and ring tones), AC and DC voltages, ground start and loop start lines, digital and analog lines, and line installation. Gain an introduction to private branch exchange (PBX) systems. Learn to identify types of line trouble and practice repair procedures. Contact Information 416-415-5000, ext. 4861 firstname.lastname@example.org Course Section(s) Available Class dates and registration for the upcoming year (September 2018 to August 2019) will be available on this website on Wednesday, July 4, 2018. Please visit this page again on that date. Some courses require you to purchase a textbook. The cost of the textbook is not included in the course fee unless otherwise indicated. If there is a textbook assigned for this course, it will be listed on the bookstore website.