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FTP (File Transfer Protocol)
A protocol that is commonly used for transferring files
over the Internet.
Full duplex
Communications method that allows simultaneous
sending and receiving by transmitting in both direc-
tions using an independent sending line and receiving
line.
Global (IP) address
IP address assigned to each device connected to the
Internet that is equivalent to an address on the
Internet. IP address is required for Internet communi-
cations. In contrast, IP address freely available to
assigned to each device within an intranet is called as
"Private (IP) address".
H.264
One of the compression methods of moving images.
Half duplex
Communications method that switches between
sending and receiving using a single communications
line.
HD(High Definition)
Resolution with 1280 x 720 pixels.
HDD
Stands for Hard Disk Drive (a high capacity storage
device). This product uses hard disk drives instead of
video tapes for recording.
HVGAW(Half VGA Wide)
Resolution with 640 x 360 pixels.
Image quality
Image quality varies depending on the compression
rate. In this product, the following image qualities
(compression rates) are available and they can be
selected for each camera. XF (Extra Fine: Extra fine
quality), SF (Super Fine: Super high quality), FQ (Fine:
High quality), NQ (Normal: Standard quality)
Internet
A global system of interconnected computer net-
works. It is required to contract with an Internet ser-
vice provider to connect to the Internet.
IP address (Internet Protocol Address)
The identification number assigned to PCs connected
via IP networks such as the Internet or an Intranet, or
to individual communications devices. Do not assign
the same address to multiple devices, especially on
the Internet.
LAN (Local Area Network)
A communications network for connecting PCs, print-
ers and other network devices in a relatively small
area such as in a building or floor of a building or
campus in which data is transferred.
MAC address (Media Access Control address)
Fixed physical address assigned to network devices.
Devices send and receive data based on this.
M-JPEG
Indicates a video format to sequentially transmit
JPEG images from cameras.
Some cameras phrase this video codec as just
"JPEG".
Multiscreen display
This product can display multiple camera simultane-
ously while displaying live images or playback imag-
es. Displaying of images from 4 cameras or from 16
cameras simultaneously is called as the 4-screen dis-
play or 16-screen display respectively.
NAT (Network Address Translation)
A technology for sharing a single global address
between two or more PCs.
NTP (Network Time Protocol)
A protocol developed to accurately maintain time
among hosts on the Internet.
Pillar box
A display format to which blank space is added to
both sides of the video to maintain the aspect ratio.
Plug-in software
Small programs used to add functions to application
software.
POP 3
A protocol for receiving e-mail stored on a server on
the Internet or an Intranet.
POP 3 Server
A server that supports POP3, currently the most
widely used mail sending protocol.
