Axis 210A User Manual

Also see for Axis 210: User manual Specifications Product guide Installation guide Installation guide

Axis 210A User Manual Manual pdf 70 page image

70 AXIS 210A/211A - Glossary of TermsActive Speaker - a speaker with a built-in power amplifier.ActiveX - A control (or set of rules) used by a browser.ActiveX controls are often downloaded and installedautomatically as required.ADPCM - Adaptive Differential Pulse Code Modulation.Predicts the analog signal digitally and the difference iscoded.AMC - AXIS Media Control. The control required forviewing video images in Internet Explorer for Windows.Installs automatically on first use.API - Application Programming Interface. The Axis API canbe used for integrating Axis products into otherapplications.ARP - Address Resolution Protocol. A protocol for assigningan IP address to a physical device address that is recognizedin the local network. The ARP command can be used to setthe IP-address for your product.ARTPEC - Axis Real Time Picture Encoder - used for videoimage 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 coming throughthe camera’s lens. Each of the thousands or millions of tinypixels that make up the CCD convert this light intoelectrons.CGI - Common Gateway Interface. A set of rules (or aprogram) that allows a Web Server to communicate withother programs.Client/Server - Describes the network relationship betweentwo computer programs in which one, the client, makes aservice request from another - the server.dB (Decibels) - A unit to measure sound level changes. A3dB change is the smallest level change we can hear. A 3dBchange is actually twice or half the audio power level. Again of 0dB leaves the signal level unchanged.DC-Iris - This special type of iris is electrically controlledby the Axis camera, to automatically regulate the amount oflight allowed to enter.DNS - The Domain Name System (DNS) locates andtranslates Internet domain names into IP (Internet Protocol)addresses.Ethernet - A widely used networking standard.ETRAX - Axis' own microprocessor.Firewall - A virtual barrier between a LAN (Local AreaNetwork) and other networks, e.g. the Internet.FTP - File Transfer Protocol. Used for the simple transfer offiles to and from an FTP-server.Full duplex - Transmission of data, e.g. audio, in twodirections simultaneously.G.711 - G.711 is the international standard for encodingtelephone audio on 64 kBit/s channel. It is a pulse codemodulation (PCM) scheme operating at 8 kHz sample rate.G.726 - Frequently used speech-compression algorithm intelecommunications due to its high perceived speech qualityand low resource requirements.Half duplex- A half duplex link can communicate in onlyone direction, at a time. Two way communication ispossible, but not simultaneously. Walkie-talkies and CBradios mimic this behavior in that you cannot hear the otherperson if you are talking.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 other files)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, toallow 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 AllianceJPEG - 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 operating system, which is “open source”and practically free of charge.Lux - A standard unit for the measurement of light, where 1Lux equals the light emitted from a single candle at adistance of one meter.Mbit/s - Megabits per second. A unit for measuring speedsin networks. A LAN might run at 10 or 100 Mbit/s.MPEG-4 - A standard video format, used for low bandwidthvideo streams.Multicast - The same information is sent only once andonly to the intended recipients.NTSC - National Television Standards Committee. NTSC isthe standard format used for televisions in most of Northand Central America, and Japan.Glossary of Terms