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101
Glossary of Terms
Abnormality – Any malfunction in terms of storage of data to the SD card.
Alarm Delay – The gap in time between alarm activation and Relay alarm activation.
Alternate Gateway – The node on the computer network that the network software uses when an IP address
does not match any other routes in the routing table, and when the default gateway is not available.
Anti-Dither – This time value controls how long the alarm signal lasts. The values in this field can range from 5
to 600 seconds. Based on motion detection, a buzzer can go off, a tour can begin, PTZ can be activated, a
snapshot can be taken, or the camera can begin recording.
DDNS – This stands for Dynamic Domain Name System. DDNS is a method of automatically updating a name
server in the Domain Name System (DNS), often in real time, with the active DNS configuration of its
configured hostnames, addresses or other information.
Default Gateway – The node on the computer network that the network software uses when an IP address
does not match any other routes in the routing table.
DHCP – Dynamic Host Configuration Protocol is a network protocol that enables a server to automatically
assign an IP address to a computer from a defined range of numbers (i.e., a scope) configured for a given
network.
Fluency – Fluency described the lack of stuttering or excessive delay in a video stream. Fluency usually comes
at the expense of video quality when a network is constrained.
IP Address – Internet Protocol Address is a unique numerical label assigned to each device connected to a
computer network. The IP address allows communication between different devices on a network.
Main Stream – Main Stream is the main streaming protocol for the camera. Main stream uses more
bandwidth and attempts to keep quality and fluency high.
NO/NC – Normally Open and Normally Closed are options for sensor type. These settings allow for different
exposure types when capturing video and still images.
NTP – Network Time Protocol is a networking protocol for clock synchronization between computer systems
over packet-switched, variable-latency data networks.
P2P – Peer-to-Peer is a decentralized communications model in which each party has the same capabilities
and either party can initiate a communication session.
PPPoE – Point to Point Protocol over Ethernet is a network protocol for encapsulating Point to Point Protocol
data packets inside Ethernet frames.
PTZ – Pan Tilt Zoom is a feature that allows a camera to remotely change its position.
QR Code – Quick Response code is a type of digital barcode that enables devices to share complex data strings
quickly.
Record Delay – Record Delay specifies in seconds how long the delay between alarm activation and recording
should be.
Relay Out – Relay Out triggers a connected alarm (connected to the alarm port on the back of the camera)
when an alarm on the camera is triggered.
S/N – S/N stands for serial number. The S/N is unique to each camera and can be used to connect to different
Amcrest apps and services to provide different methods of access to the camera.
Sensitivity – Sensitivity is the amount of change required to increase the motion detected by a percentage.
The lower the sensitivity, the more movement is required to trigger an alarm.
SMTP – Simple Main Transfer Protocol is an Internet standard for electronic mail (e-mail) transmission.
Static IP – An IP address that does not change.
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