Interlogix NVR 20 User Manual - Manual (Page 149)

TruVision NVR 20 User Manual 143
Appendix G
Glossary of Terms
Term Definition
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 DVR, with the main stream having a
maximum resolution of 4CIF and the sub-stream having a maximum
resolution of CIF.
HDD Acronym for Hard Disk Drive. A storage medium which stores digitally
encoded data on platters with magnetic surfaces
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
HTTP Acronym for Hypertext Transfer Protocol. A protocol to transfer
hypertext request and information between servers and browsers over a
network
PPPoE PPPoE, Point-to-Point Protocol over Ethernet, is a network protocol for
encapsulating Point-to-Point Protocol (PPP) frames inside Ethernet
frames. It is used mainly with ADSL services where individual users
connect to the ADSL transceiver (modem) over Ethernet and in plain
Metro Ethernet networ
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
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.
PTZ Acronym for Pan, Tilt, Zoom. PTZ cameras are motor driven systems
that allow the camera to pan left and right, tilt up and down and zoom in
and out
USB Acronym for Universal Serial Bus. USB is a plug-and-play serial bus
standard to interface devices to a host computer.