User Manual

Chapter 16 Appendix
16.1 Glossary
Dual-Stream
Dual-stream is a technology used to record high resoluon video locally while transming a
lower resoluon stream over the network. The two streams are generated by the DVR, with the
main stream having a maximum
resoluon of 1080P and the sub-stream having a maximum
resoluon 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 plaers
with magnec surfaces.
DHCP
Dynamic Host Conguraon Protocol (DHCP) is a network applicaon protocol used by devices
(DHCP clients) to obtain conguraon informaon for operaon in an Internet Protocol
network.
HTTP
Acronym for Hypertext Transfer Protocol. A protocol to transfer hypertext request and
informaon between servers and browsers over a network.
PPPoE
PPPoE, Point-to-Point Protocol over Ethernet, is a network protocol for encapsulang 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 networks.
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
nofy a domain name server to change, in real me (ad-hoc) the acve DNS conguraon of its
congured hostnames, addresses or other informaon stored in DNS.
Hybrid DVR
A hybrid DVR is a combinaon of a DVR and NVR.
NTP
Acronym for Network Time Protocol. A protocol designed to synchronize the clocks of
computers over a network.
Network Video Recorder User Manual
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