Axis 223M User Manual

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67AXIS 223M - Glossary of TermsGlossary of TermsActiveX - A software component, also referred to as acontrol, that integrates into and extends the MicrosoftInternet Explorer web browser. ActiveX controls aretypically downloaded and installed dynamically by thebrowser from a web page.AMC - AXIS Media Control. The control required forviewing video images in Internet Explorer. Installsautomatically on first use.API - Application Programming Interface. The Axis APIcan be used for integrating Axis products into otherapplications.ARP - Address Resolution Protocol. A protocol used toassociate an IP address to a hardware MAC address. Arequest is broadcast on the local network to find out whatthe MAC address is for the IP address.ARTPEC - Axis Real Time Picture Encoder - used forvideo image compression.CCD - Charge Coupled Device. CCD is one of the two maintypes of image sensors used in digital cameras. When apicture is taken, the CCD is struck by light comingthrough the camera’s lens. Each of the thousands ormillions of tiny pixels that make up the CCD convert thislight into electrons.CGI - Common Gateway Interface. A set of rules (or aprogram) that allows a Web Server to communicate withother programs.Client/Server - Describes the network relationshipbetween two computer programs in which one, the client,makes a service request from another - the server.DC-Iris - This special type of iris is electrically controlledby the Axis camera, to automatically regulate the amountof light allowed to enter.DNS - The Domain Name System (DNS) locates andtranslates Internet domain names into IP (InternetProtocol) addresses.Ethernet - A widely used networking standard.ETRAX - A family of microprocessors developed by Axis.Firewall - A virtual barrier between a LAN (Local AreaNetwork) and other networks, e.g. the Internet.FTP - File Transfer Protocol. Used for the simple transferof files to and from an FTP-server.Full-duplex - Transmission of data, e.g. audio, in twodirections simultaneously. In an audio system this woulddescribe e.g. a telephone system. Half-duplex alsoprovides bi-directional communication, but only in onedirection at a time, as in a walkie-talkie system. See alsoSimplex.HTML - Hypertext Mark-up Language. Used widely forauthoring documents viewed in web browsers.HTTP - Hypertext Transfer Protocol. The set of rules forexchanging files (text, images, sound, video, and otherfiles) on the World Wide Web.HTTPS - Hypertext Transfer Protocol over Secure SocketLayer. A web protocol that provides encryption for pagerequests from users and for the pages returned by the webserver.Intranet - A private network limited to an organization orcorporation. Usually closed to external traffic.IP - Internet-Protocol. See TCP/IP.IP address - A unique number used by a network device,to allow it to be identified and found on the network. The32-bit IP address is made up of four groups (or quads) ofdecimal digits separated by periods. An example of an IPaddress is: 192.168.0.1ISMA - Internet Streaming Media Alliance.JPEG - A standard image format, used widely forphotographs. Also known as JPG.LAN - A local area network (LAN) is a group of computersand associated devices that typically share commonresources within a limited geographical area.Linux - A popular, free, open source, UNIX like operatingsystem, developed in cooperation by various individualsand organizations.Lux - A standard unit for the measurement of light, where1 Lux equals the light emitted from a single candle at adistance of one meter.Mbit/s - Megabits per second. A unit for measuringspeeds in networks. A LAN might run at 10 or 100 Mbit/s.MPEG-4 - A video compression standard that makes gooduse of bandwidth, and which can provide high-qualityvideo streams at less than 1 Mbit/s.Multicast - A bandwidth-conserving technology thatreduces bandwidth usage by simultaneously delivering asingle stream of information to multiple networkrecipients.NTSC - National Television Standards Committee. NTSC isthe standard format used for televisions in most of Northand Central America, and Japan.NWAY - A network protocol that automaticallynegotiates the highest possible common transmissionspeed between two devices.PAL - Phase Altering Line. PAL is the standard formatused for televisions in most of the world (other than theUS, Canada, and Japan).

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