Milestone XProtect Professional 2014 - Manual (Page 205)

Milestone XProtect ® Professional
2014
Administrator's Manual
www.milestonesys.com 205 Glossary of Terms
together with I-frames. An I-frame, also known
as a keyframe, is a single frame stored at
specified intervals. The I-frame records the
entire view of the camera, whereas the frames
that follow (the P-frames) record only the
pixels that change. This helps greatly reduce
the size of MPEG files.
PIN
Personal identification number (or personal
identity number)
—number used to identify and
authenticate users.
Ping
A computer network administration utility used
to determine whether an IP address is
available, by sending a small amount of data to
see if it responds. The word ping was chosen
because it mirrors the sound of a sonar. You
send the ping command using a Windows
command prompt.
Polling
Regularly checking the state of something, for
example, whether input has been received on
a particular input port of a device. The defined
interval between such state checks is often
called a polling frequency.
Port
Logical endpoint for data traffic. Networks use
different ports for different types of data traffic.
Therefore it is sometimes, but not always,
necessary to specify which port to use for
particular data communication. Most ports are
used automatically based on the types of data
included in the communication. On TCP/IP
networks, port numbers range from 0 to 65536,
but only ports 0 to 1024 are reserved for
particular purposes. For example, port 80 is
used for HTTP traffic, which is used when
viewing web pages.
POS
(Also PoS) Point of sale: the physical place
where a sale is made, for example, at the cash
register.
Post-recording
The ability to store recordings from periods
following motion and/or specified events.
Based on incoming video being buffered on
the XProtect Professional server in case it is
going to be needed for a motion- or event-
triggered recording. Using post-recording can
be highly advantageous: if, for example, you
have defined that video should be recorded
while a gate is open, being able to see what
happens immediately after the gate is closed
may also be important.
Pre-alarm
Pre-alarm images is a feature available for
selected cameras only. It enables the sending
of images from immediately before an event
took place from the camera to XProtect
Professional via e-mail.
Pre-buffer
See the description of Pre-recording.
Pre-recording
The ability to store recordings from periods
preceding detected motion and/or specified
events. Based on incoming video being
buffered on the XProtect Professional server in
case it is going to be needed for a motion- or
event-triggered recording. Using pre-recording
can be highly advantageous: if, for example,
you have defined that video should be
recorded when a door is opened, being able to
see what happened immediately prior to the
door being opened may also be important.
Privacy masking
The ability to define if and how selected areas
of a camera's view should be masked before
distribution. For example, if an XProtect
Professional camera films a street, you can
mask certain areas of a building (for example,
windows and doors) with privacy masking in
order to protect residents' privacy.
PTZ