User manual
165ALI-NVR5000P Embedded NVR User Manual
APPENDIX A: GLOSSARY
APPENDIX A Glossary
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
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 Conguration Protocol (DHCP) is a network application protocol used by devices (DHCP clients) to obtain
conguration 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
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 conguration of its congured 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.
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.
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.