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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 authenti-
cation.
SMTP Server
A server that supports SMTP, currently the most widely
used mail transfer protocol.
SNMP
A protocol for monitoring and managing networked com-
munications 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 monitor-
ing 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 commu-
nication instead of costly private lines. Depending on
service, VPN also provides a secure line using authenti-
cation 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 camer-
as 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.
