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Glossary
This manual uses the following words.
ActiveX Control
A software module developed by Microsoft. It is used to
add functions, downloaded from a web server via the
Internet or an Intranet, to Internet Explorer. The recorder
uses it to display video.
Bit rate
Indicates how many bits of data can be processed or
transmitted in a unit of time. Generally, the units are in
bps, or bits per second. Used to indicate the compres-
sion rate of video and audio data, and how much data a
communications line can send and receive in 1 second.
Broadband Router
Router used to access the Internet via high-speed
ADSL or fiber optic lines.
Cable Modem
Device used for connecting to the Internet via a CATV
line. Called a cable modem because it functions similar
to a modem on a phone line. It differs from regular
modems that use a serial port in that it is connected to
a PC via an Ethernet connection.
Camera operation
Operations of the camera connected to the recorder
such as pan and tilt (horizontal and vertical position),
zooming, focusing, brightness, preset motions (move-
ment towards a set horizontal and vertical position) and
auto functions (automatic camera rotation, etc.).
DDNS
A technology for dynamically translating DNS server
information to enable the transfer of only differences in
information between DNS servers (refer to "DNS"). This
reduces the data transfer amount necessary for updat-
ing information on the DNS server and reduces the load
on the network.
DHCP
A protocol that enables PCs to automatically get infor-
mation from a server needed for accessing a network.
DHCP Server
Maintains network-related information (assigns IP
address ranges to (default) gateway servers and cli-
ents), and distributes that information when clients
request it.
DNS
The long lists of numbers or IP addresses that are used
in network environments are difficult to remember,
which makes them impractical. This is why PCs are
given an easy-to-follow name (domain name) which is
converted to an IP address before they are communi-
cated with. The DNS provides translation between
domain names and IP addresses.
Default Gateway
Network device used as a gateway for networks, such
as a local network, to access PCs on an external net-
work. Data is sent using the default gateway if a gate-
way is not specified in the destination IP address.
Disk Configuration
Configure the HDD after replacing, removing, or adding
a HDD. Disk Configuration is the menu for configuring
the HDD.
Electronic Zoom
Enlarges live images and playback images during play-
back. The electronic zoom enlarges the images by the
recorder and is separate from the zoom function includ-
ed as part of the camera operations for enlarged imag-
es.
Emergency Recording
Gives priority to recording video and audio when an
emergency occurs using the external switch connected
to the recorder.
Ethernet
LAN communication developed by Xerox.
Event
Indicates an occurrence that causes the recorder to
take an event action. Events include, terminal alarms,
command alarms, and site alarms.
Event recording
Function that automatically starts video and audio
recording when an event occurs. Event recording
includes Pre-event recording that records images
before the event and Post-event recording that records
images after the event.
External Recording Mode
Use the external switch connected to the recorder to
switch to time tables such as the recording settings and
event action settings.
