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Glossary
Motion Detection:
Is the main method used by your DVR to detect mo-
tion and is an essential part of your security system. It does this by com-
paring one frame of video with the next. A certain amount of difference
between these two frames is interpreted as motion.
NAS:
Network Attached Storage. A network device with one or more
HDDs that other network devices can use as if the storage was connect-
ed directly.
NIC:
Network Interface Controller. The hardware component that allows
a device to connect to a network. Both wired and wireless NICs exist for
these respective purposes.
NTP (Network Time Protocol):
Is used to synchronize your DVR’s clock
automatically with a network time server.
NTSC:
Is the video system used in North America, Canada and some
Latin American countries. In NTSC, 30 frames are transmitted each
second.
Optical Zoom:
Is a true zoom feature. It allows you to zoom in (or out) on
an object to get a closer view by using the camera’s lens.
OSD (On-screen Display):
Display information from the camera such as
time, date and camera name on-screen.
Pack Duration:
Instructs your DVR to split recordings into discrete units.
Each unit can be a maximum of 60 minutes in length. Your DVR will play
these as one continual video.
PAL:
Is the video system used in the United Kingdom, Australia and most
European countries. In PAL, 25 frames are transmitted each second.
Post-record:
Instructs your DVR to record for a set period of time after
an event has occurred.
PPPoE:
Point-to-Point Protocol over Ethernet is the most common
method that your router uses to login to your ISP to enable your internet
connection. This setting also exists on your DVR, but is only for advanced
users as the configuration required is difficult to complete and requires
a modem-only device (or a modem/router set to modem-only).
Pre-record:
Allows your DVR to record for a number of seconds before
an event occurs.
Resolution:
The measure of detail that can be seen in an image. The
higher the number, the greater the detail available.
RTSP:
Real Time Streaming Protocol. A network protocol designed to
transmit video and audio information over networks and the internet in
real time.
Saturation:
This alters how much colour is displayed in the image. The
higher the saturation, the more bright and vivid colours will appear.
Server Port:
Is a logical connection place and specifically, using the In-
ternet protocol TCP/IP, the way a client program specifies a particular
server program on a computer in a network. Your DVR will use this port
to send information through.
S.M.A.R.T.:
Self-Monitoring, Analysis and Reporting Technology. This is
automatic system on modern HDDs and SSDs to detect potential drive
errors before they occur.
SMTP:
This stands for Simple Mail Transfer Protocol. This is used to
send an outbound email (e.g. from your DVR to an email address).
SMTP Port:
Is the port number used by a SMTP server to listen for email
send requests. This is specified by your email provider.
