Understanding Voice-Data-Video (VDV) Systems and Components, Quizzes of Telecommunications Engineering

Download Understanding Voice-Data-Video (VDV) Systems and Components and more Quizzes Telecommunications Engineering in PDF only on Docsity! Building Auto- Voice-Data-Video (VDV) System Control Devices and Applications Exam (GRADED A) Voice-Data-Video (VDV) systems include: Telephony, data network, and closed-circuit television (CCTV) systems. Public Switched Telephone Network (PSTN) A network of telephone exchanges that can be connected together to make a continuous circuit for each telephone call. Private Branch Exchanges (PBXs) connect in-house telephones together within a private network and manage the telephones' access to the Public Switched Telephone Network (PSTN). Voice over IP (VoIP) systems use special telephones that convert voice audio into packets of digital information to be transmitted over the internet. The simplest CCTV system consists of: just a camera and a monitor, although most systems also include a recording device. DTMF tones each telephone keypad digit responds to a pair of DTMF tones. Field-of-view control of the field-of-view of a camera involves changing it's position and zoom level. Telephone Hook Switch changing the position of a telephone hook switch changes the operation of a telephone. Telephone Handset includes a microphone and a speaker that convert sound pressure waves to an from electrical signals. Bit Rates and Baud Rates if the transmitted electrical signals from a telephone are greater than one bit in length, then the bit rate is greater than a corresponding baud rate. Camera Lenses focus light reflected from an object within its field-of-view on an image sensor, which converts the light information into electrical signals. Focal Length the focal length of a camera lens determines how much area is covered by the camera. Analog Video Image Signals are composed of lines of information.