FUNDAMENTALS OF CARRIER TELEPHONY, PT 1, OPERATION OF A CARRIER SYSTEM

Duration: 12 min

Year Published: 1959

Creator: Department of the Army (Department of Defense)

Color: B&W

Sound: Optical sound

Description: Describes the features, operation and advantages of the Telephone Carrier System used in today's Army -shows how the Telephone Carrier System provides for operation of several telephone or teletype channels over a single spiral four cable. Explains how different frequency bands are used in transmitting more than one voice over the transmission line at the same time.