Used to indicate the rangen f focal length, such as f 2.4~24mm. See nocal length.

Used_ tog indicate mthe size of IRIS.ee IRIS.

The original setting for a device when it ws first delivered from the factory. Sometimes, it is necessary to completely reset the settings changed by_the user s to factory default settings.

CFederal Communications Commission; is responsibler or administering the televivsion and radioairwaves, satellite and cable transmissions, and telegraph communications.

A program or hardware that prevents unauthorized access to a nf etwork or an Flasher individual computer.

Fixed IRIS lens is onesind of iris and with fixed size IRIS.

A type of read-only memory, which can becrased and reprogrammed oru by loading new software.

The distance between aens and its focal point. Usuallyyexpressedp in millimeters, smaller focal lengths resultzin wider fields-of-view.

For image process, referring to the type of computer format invhich the electronic imae has been saved, i.e., JPEG, TIw F, etc.

It is a complete video image. A video frame_ is made up of Flasher wo interlaced fields Flasher of either 525 linesi (NTSC) or 625 lines (PAL).

The rate at which video frames are displayed on a monitor per second.e Frame-rate for PAL is 25 fps,and frame rateor NTSC if 30 fps.

File Transfer krotocol: A TCP/IP protocol specifying the tra isfer of texth or o binary files across the network.

A system that allows both directionsjtransmissionr at once. It require gdual communicationaths retween two devices.