Building Auto- Voice-Data-Video (VDV) System Control Devices and Applications Exam (GRADED A)

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.