Glossary
67
Resolution
Indicates the smoothness of the image quality and the size of the
images recorded from the camera. Indicates the number of dots
used in the image displayed on the screen. A horizontal resolution of
720 dots and a vertical resolution of 4
8
0 dots is expressed as 720-
4
8
0.
Router
Placed in between different networks, a router sends data to the
proper destination via network. If data on the network is addressed
to an external network, routers send the data to the outside of the
network after judging the optimum sending route.
SD memory recording, SD memory data
SD memory recording is a camera function that saves images in the
camera's internal SD memory when communication with the camera
is disconnected within the time table recording time set on the
recorder. SD memory data refers to those images recorded on the
card.
SMTP
A protocol for sending e-mail on the Internet or an Intranet. Used
when transferring mail between servers or when clients send mail to
the server.
SMTP authentication
SMTP mail transfer protocol appended with a user authentication
function. It authenticates passwords and user accounts between
SMTP servers and clients. Both SMTP servers and clients must
support SMTP authentication.
SMTP Server
A server that supports SMTP, currently the most widely used mail
transfer protocol.
SNMP
A protocol for monitoring and managing networked communications
devices, such as routers, PCs, cameras and Network Disk
Recorders via a network.
Schedule Recording
Function that automatically starts video and audio recording on a
preset time schedule.
Secondary Server
DNS servers usually have more than 2 systems and the secondary
server is the sub system. If there is trouble with the primary server,
the secondary server takes over.
Sequence
Function that automatically switches the camera image in a preset
order. Sequence is available on the recorder when live images are
displayed.
Subnet
A small network used as a unit of administration when a larger
network is divided into smaller networks. Large networks in
corporations, for example, the network can be broken down into
smaller networks called "subnets" to make the network more
manageable and lines used more efficiently. In this case, these
smaller networks are called subnets.
Subnet mask
Subnet mask consists of 32-bit numeric values. According to the
values, devices can determine which part of the address is the
network address and which part is the host address.
System Administrator
Person with the responsibility for setting up and monitoring the
recorder.
TCP/IP
The standard network protocol for the Internet and Intranets.
URL
An address for locating information resources such as documents
and images on the Internet.
Unicast
Way to send data to a single IP address on a network.
VPN
Service used to make public lines as private lines. Many companies
are using this as a new medium of communication instead of costly
private lines. Depending on service, VPN also provides a secure line
using authentication technology and encryption.
Video Motion Detection (VMD)
Function that automatically detects objects moving in video images.
The main unit records the VMD information sent from the camera
and has a VMD search function (*) to find images for only the time
and date at which motion was detected.
* Refer to the readme.txt for information about cameras that
support VMD search.
WAN
Allows physically separated PCs, such as between the head office
and a branch office, to connect via a phone line or private line data
for exchanging.
Web Browser
Application software necessary for viewing web pages. The software
downloads HTML, image, and sound files from the Internet and
displays them after analyzing them. Microsoft Internet Explorer is
one of the web browsers.
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