Interlogix NVR 50 User Manual - Manual (Page 171)

TruVision NVR 50 User Manual 165
Glossary
Term Definition
Data redundancy Writing data to two or more locations for backup and data recovery. For
example, data can be stored on two or more HDDs.
DDNS Dynamic DNS is a method, protocol, or network service that provides
the capability for a networked device, such as a router or computer
system using the Internet Protocol Suite, to notify a domain name server
to change, in real time (ad-hoc) the active DNS configuration of its
configured hostnames, addresses or other information stored in DNS
DHCP Dynamic Host Configuration Protocol (DHCP) is a network application
protocol used by devices (DHCP clients) to obtain configuration
information for operation in an Internet Protocol network
Dual stream Dual stream is a technology used to record high resolution video locally
while transmitting a lower resolution stream over the network. The two
streams are generated by the NVR, with the main stream having a
maximum resolution of 4CIF and the substream having a maximum
resolution of CIF.
DVR Acronym for Digital Video Recorder. A DVR is device that is able to
accept video signals from analog cameras, compress the signal and
store it on its hard drives
HDD Acronym for Hard Disk Drive. A storage medium which stores digitally
encoded data on platters with magnetic surfaces
HTTP Acronym for Hypertext Transfer Protocol. A protocol to transfer
hypertext request and information between servers and browsers over a
network
Hybrid DVR A hybrid DVR is a combination of a DVR and NVR.
NTP Acronym for Network Time Protocol. A protocol designed to synchronize
the clocks of computers over a network.
NTSC Acronym for National Television System Committee. NTSC is an analog
television standard used in such countries as the United States and
Japan. Each frame of an NTSC signal contains 525 scan lines at 60Hz
NVR Acronym for Network Video Recorder. An NVR can be a PC-based or
embedded system used for centralized management and storage for IP
cameras, IP Domes and other DVRs.
PAL Acronym for Phase Alternating Line. PAL is also another video standard
used in broadcast televisions systems in large parts of the world. PAL
signal contains 625 scan lines at 50Hz.