Axis Communications AXIS 241SA user manual Identity of the server

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identity of the server.

Subnet & subnet mask - A subnet is an identifiably separate part of an organization's network. Typically, a subnet may represent all the machines at one geographic location, in one building, or on the same local area network (LAN). Having an organization's network divided into subnets allows it to be connected to the Internet with a single shared network address.

The subnet mask is the part of the IP address that tells a network router how to find the subnet that the data packet should be delivered to. Using a subnet mask saves the router having to handle the entire 32-bit IP address; it simply looks at the bits selected by the mask.

Switch - A network device that connects network segments together, and which selects a path for sending a unit of data to its next destination. In general, a switch is a simpler and faster mechanism than a router, which requires knowledge about the network and how to determine the route. Some switches include the router function. See also Router.

TCP (Transmission Control Protocol) - TCP is used along with the Internet Protocol (IP) to transmit data as packets between computers over the network. While IP takes care of the actual packet delivery, TCP keeps track of the individual packets that the communication (e.g. requested a web page file) is divided into, and, when all packets have arrived at their destination, it reassembles them to re-form the complete file.

TCP is a connection-oriented protocol, which means that

aconnection is established between the two end-points and is maintained until the data has been successfully exchanged between the communicating applications.

Telnet - Telnet is a simple method with which to access another network device, e.g. a computer. The HTTP protocol and the FTP protocols allow you to request specific files from remote computers, but do not allow you logon as a user of that computer. With Telnet, you log on as a regular user with whatever privileges you may have been granted for specific applications and data residing on that computer.

Time-lapse recorder - This type of video recorder is commonly used in the security industry and has the ability to record up to one week of video on a single tape. The most commonly used timing is the 24-hour mode. Having to change tapes only once a day and retaining large amounts of information are perceived as key advantages in using this particular mode of recording.

TVL (TV Lines) - A method of defining resolutions in analog video.

UDP (User Datagram Protocol) - UDP is a communications protocol that offers limited service for exchanging data in a network that uses the Internet Protocol (IP). UDP is an alternative to the Transmission

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Control Protocol (TCP). The advantage of UDP is that it is not required to deliver all data and may drop network packets when there is e.g. network congestion. This is suitable for live video, as there is no point in re-transmitting old information that will not be displayed anyway.

Unicast - Communication between a single sender and a single receiver over a network. A new connection is established for each new user. See also Multicast.

UPnPTM - A set of computer network protocols that allows the automatic peer-to-peer detection of devices on the network. UPnP is promoted by the UPnP Forum.

URL (Uniform Resource Locator) - An "address" on the network.

USB (Universal Serial Bus) - A plug-and-play interface between a computer and peripheral devices (scanners, printers)

Varifocal lens - A lens that provides a wide range of focal lengths, as opposed to a lens with a fixed focal length, which only provides one.

Video camera - See Network camera and CCTV video camera.

Video decoder - A network video decoder converts digital video and audio streams back into analog signals, which can then be displayed on standard TV sets, analog monitors and video switches.

Video encoder (video server) - A video encoder/server digitizes analog video signals and sends digital images directly over an IP network, such as a LAN, intranet or the Internet. In effect, it turns an analog video system into a network video system and enables users to view live images using a web browser or application software on any local or remote computer on a network.

Video management software - Video management software supplies the means for monitoring, analyzing and recording network video. In its simplest form, it offers live viewing, storage and retrieval of video sequences. Advanced applications may also provide support for recording of live video from multiple devices, different recording modes, search functions, remote access via a web browser, control of PTZ devices, etc.

VMD (Video Motion Detection) - Video Motion detection defines activity (motion) in a monitored scene by analyzing image data and differences in series of images. This detection can, for example, be used to trigger an alarm event in a network camera and start the upload of images from the camera.

Video switcher - An analog video switcher sequentially displays full screen images, from one camera after another, typically at 3-5 seconds intervals. Other camera sources are not recorded while the image source from one camera is displayed on screen.

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Contents User’s Manual About This Document Table of contents Axis video server Overview of the Axis video server Product descriptionStatus LED indicatorsFront panel Axis 241QA NetworkPower Switches & connectorsRear panel Axis 241QA/AXIS 241SA Product description Accessing the video server Using the video serverPlease see the online help for more information Setting the root passwordLive View AMC Audio controls MPEG-4 Video and audio streamsVideo stream types Motion JpegMPEG-4 protocols and communication methods How to stream MPEG-4Axis Media Control AMC RTP/RTSP/HTTP or RTP/RTSP/HTTPS Other methods of accessing the video streamRTP+RTSP RTP/RTSPOther MPEG-4 clients Accessing the audio streamsAxis Vapix API Accessing the Setup tools Configuring the video serverImage settings Video & image settingsImage appearance Advanced Video source settingsOverlay/Mask type Quad stream settingsOverlay/Mask settings MjpegImage Formats Image Size Upload and use an overlay imageOverlay image requirements Overlay image limitationsUse a Privacy Mask Audio Channels Audio SettingsEnable Audio AudioAudio Input Noise canceller threshold value Noise canceller attenuation Advanced Audio SettingsAudio Output Axis 241QA/AXIS 241SA Audio Layout Live View ConfigUpload Own Web Files Customizing the defaultViewer Settings Default Live View VideoDefault Video Format Default ViewerUser-defined Links Html ExamplesCheck Show Custom Link External Video Sequence ModePan Tilt Zoom Installing PTZ devicesPreset positions PTZ configurationPTZ controls PTZ control modes Using CGI links to control PTZ devicesControl panel Guard tour Preset positionsAdvanced PTZ control queue Axis 241QA/AXIS 241SA Pan Tilt Zoom Event servers Event configurationClick Add triggered on the Event types How to set up a triggered eventEvent types Triggered EventClick Add scheduled on the Event types How to set up a scheduled eventPre-trigger and post-trigger buffers Scheduled eventCamera tampering SettingsMotion detection How to configure Motion DetectionObject Size Port statusIP Address Filter System optionsSecurity UsersHttps Stream, IP address filtering must be enabledAxis 241QA/AXIS 241SA System options Radius Date & timeCA servers IP Address Configuration Network Basic TCP/IP settingsServices Host Name Configuration Network Advanced TCP/IP settingsDNS configuration NTP ConfigurationFTP HttpRtsp Smtp email QoS SettingsSocks QoSRTP / MPEG-4 SnmpPorts & devices MaintenanceSupport Configuration Using the Control Button Resetting to the factory default settingsD-Sub connector Unit connectorsPin Pin Function Description I/O terminal connectorCOM ports RS-232 and RS-485 Schematic diagram I/O terminal connectorAxis 241QA/AXIS 241SA Unit connectors Checking the firmware TroubleshootingUpgrading the firmware Emergency recovery procedure Alarms, etc, to a destination outside the local network Be accessed from a web browserLit Only I frames Video Image ProblemsNo images displayed in the Web interface Snapshot imagesPoor audio quality Audio volume too low/highAudio Advanced Settings Audio Axis 241QA onlyModels Technical specificationsVideo access from Web ConnectorsApplications not Optimizing your system General performance considerationsFrame rates MPEG-4 Frame rates Motion JpegBandwidth Glossary Active Speaker a speaker with a built-in power amplifierDe-interlacing See interlacing Compression See Image CompressionFixed iris See Autoiris Encoder See Video encoderHalf-duplex See Full-duplex Megapixel See Pixel Axis 241QA/AXIS 241SA Glossary SSL/TSL Video camera See Network camera and Cctv video camera Identity of the serverAn I-VOP is a complete image frame Http API requests Http port number Http server IndexAction Http APIRTP 14 Rtsp 14 Video streams 13, 15