NVR User Manual 061220NA
164
Chapter 16 Appendix
16.1
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 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
•
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.
•
Hybrid NVR:
A hybrid NVR is a combination of a NVR 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 NVRs.
•
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.
16.2
Troubleshooting
•
No image displayed on the monitor after starting up normally. Possible Reasons:
−
No VGA or HDMI connections.
−
Connection cable is damaged.
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