AXIS 241QA/AXIS 241SA Video Server User’s Manual
About This Document This manual is intended for administrators and users of Axis video servers. This manual describes AXIS 241QA/AXIS 241SA, with firmware release 4.47. The manual includes instructions for using and managing the AXIS 241QA/AXIS 241SA on your network. Previous experience of networking will be of use when installing and using this product. Some knowledge of UNIX or Linux-based systems would also be beneficial, for developing shell scripts and applications.
AXIS 241QA/AXIS 241SA Table of contents Product description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Overview of the AXIS video server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 AXIS 241QA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 AXIS 241SA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Axis video server Event configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Event servers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Event types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Camera tampering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AXIS 241QA/AXIS 241SA - Product description Product description This manual describes the AXIS 241QA: 4-port video server including 2-way audio, and the AXIS 241SA: 1-port video server including 2-way audio. Overview of the AXIS video server The Axis video server is fully featured for security surveillance and remote monitoring needs.
AXIS 241QA/AXIS 241SA - Product description AXIS 241QA The AXIS 241QA provides 4 BNC inputs for connecting analog video devices. The AXIS 241QA also provides a Line/Microphone In (mono) connector for connecting an external microphone or other source, producing a line level signal. An active speaker with a built-in amplifier can be connected to Line Out (mono), to enable two-way communication.
AXIS 241QA/AXIS 241SA - Product description Power Green Normal operation. Amber Flashes green/amber during firmware upgrade. Switches & connectors DIP switch - A corresponding line termination switch is supplied for each video input. All units are shipped with line termination enabled for each video input; that is, with the DIP switch set in the down position.
AXIS 241QA/AXIS 241SA - Product description Note: The I/O terminal connector also provides an auxiliary connection point for DC power. Network connector - The Axis video server connects to the network via a standard network cable, and automatically detects the speed of the local network segment (10BaseT/100BaseTX Ethernet). RS-232 connector - A 9-pin D-SUB connector providing an RS-232 serial connection. Typically used for connecting Pan/Tilt/Zoom devices.
AXIS 241QA/AXIS 241SA - Using the video server Using the video server The AXIS 241QA/AXIS 241SA can be used with most operating systems and web browsers. The recommended browser is Internet Explorer with Windows, and Mozilla with other operating systems. See also the Technical specifications, on page 66. Note: For information on installing the video server, please refer to the Installation Guide. Accessing the video server 1. Start your web browser. 2.
AXIS 241QA/AXIS 241SA - Using the video server Notes: • • • To view streaming video in Microsoft Internet Explorer, you must set your web browser to allow the AXIS Media Control (AMC) to be installed on your computer. AMC is required to use audio in the AXIS 241QA/AXIS 241SA. AMC also provides an MPEG-4 decoder for viewing MPEG-4 video streams. This decoder is installed the first time an MPEG-4 video stream is accessed.
AXIS 241QA/AXIS 241SA - Using the video server 5. If required, click Yes to install the AXIS Media Control (AMC). You will need administrator rights on the computer to do this. The Live View Page If your AXIS 241QA/AXIS 241SA has been customized to meet specific requirements, all the buttons and other items described below may not be displayed on the Live View page.
AXIS 241QA/AXIS 241SA - Using the video server The Snapshot button saves a snapshot of the video image currently displayed. The Snapshot function and the target directory for saving snapshots can be configured from the AMC Control Applet, which can be opened from the Windows Control Panel or by right-clicking the image. Click the View Full Screen button and the video image will fill the entire screen area. No other windows will be visible. Press Esc (Escape) on your keyboard to cancel full screen view.
AXIS 241QA/AXIS 241SA - Video and audio streams Video and audio streams The AXIS 241QA/AXIS 241SA provides several different video and audio stream formats. The type to use depends on your requirements and on the properties of your network. The Live View page in the AXIS 241QA/AXIS 241SA provides access to Motion JPEG and MPEG-4 video and audio streams, as well as to single JPEG images.
AXIS 241QA/AXIS 241SA - Video and audio streams MPEG-4 protocols and communication methods To deliver live streaming video over IP networks, various combinations of transport protocols and broadcast methods are employed. • RTP (Real-Time Transport Protocol) is a protocol that allows programs to manage the real-time transmission of multimedia data, via unicast or multicast. • RTSP (Real-Time Streaming Protocol) serves as a control protocol, to negotiate which transport protocol to use for the stream.
AXIS 241QA/AXIS 241SA - Video and audio streams RTP+RTSP This method (actually RTP over UDP and RTSP over TCP) should be your first consideration for live video, especially when it is important to always have an up-to-date video stream, even if some images do get dropped. This can be configured as multicast or unicast. Multicasting provides the most efficient usage of bandwidth, especially when there are large numbers of clients viewing simultaneously.
AXIS 241QA/AXIS 241SA - Video and audio streams Other MPEG-4 clients Although it may be possible to use other clients to view the MPEG-4 stream, it is not guaranteed to work in all cases. For some other clients, such as QuickTime™ the Video Object Type must be set to Simple. It may also be necessary to adjust the advanced MPEG-4 settings. To access the video stream from e.g. QuickTime™ the following path can be used: rtsp:///mpeg4/#/media.
AXIS 241QA/AXIS 241SA - Configuring the video server Configuring the video server This section describes how to configure the AXIS 241QA/AXIS 241SA and is intended for administrators, who have unrestricted access to all the Setup tools The AXIS 241QA/AXIS 241SA is configured from the Setup link in a web browser. For more information on supported browsers, see the Technical specifications, on page 66. Accessing the Setup tools Follow the instructions below to access the Setup Tools from a web browser. 1.
AXIS 241QA/AXIS 241SA - Video & image settings Video & image settings Below you find examples of the features available in the AXIS 241QA/AXIS 241SA. For details of each setting, please refer to the online help available from each page. Click to access the online help. Image settings Image appearance Modify image appearance to optimize the video images according to your requirements.
AXIS 241QA/AXIS 241SA - Video & image settings Mirroring Mirroring is the horizontal flipping of an image, that gives you another image perspective. This is a useful function when you need a direct view of the image, for example, in ATMs and door phones. The mirroring settings should be defined before you define the parameters for privacy masks and motion detection. Text overlay settings Include date, time and/or text of your choice to be viewed on the image.
AXIS 241QA/AXIS 241SA - Video & image settings The MPEG-4 standard provides many different coding tools for various applications in different situations. As most MPEG-4 clients do not support all of these tools, it is usual to instead define and use subsets for different clients or groups of clients. These settings allow you to define the type of viewing client to use.
AXIS 241QA/AXIS 241SA - Video & image settings Upload and use an overlay image 1. Select Uploaded image as overlay in the drop-down list against Overlay/Mask Type. 2. In the field Upload own image, click the Browse button and locate the image file on your computer or server. 3. Click the Upload button and follow the on-screen instructions. To use an already uploaded image: 1. Select an uploaded image from the Use image drop-down list. 2.
AXIS 241QA/AXIS 241SA - Video & image settings Use a Privacy Mask To use privacy masks to hide different areas of the video image: 1. Select Configurable areas as privacy mask in the Overlay/Mask Type drop-down list. 2. Enter the (x,y) coordinates of the top left hand corner of the mask, and the height and width to define the masks’ placement and size. 3. Select the color for the privacy mask - black, grey, white, or red. 4. Check the Enable box to enable the masks you have defined and click on Save.
AXIS 241QA/AXIS 241SA - Audio Audio The AXIS 241QA/AXIS 241SA can transmit audio to other clients using an external microphone and can play audio received from other clients by attaching a speaker. The Audio Settings allow different audio configurations to be set up, such as full duplex, half duplex, and simplex. Note: The speaker attached to the audio output of the AXIS 241QA/AXIS 241SA must have a built-in amplifier, which is the case for e.g. some PC speakers.
AXIS 241QA/AXIS 241SA - Audio Full-duplex mode means that you can transmit and receive audio (talk and listen) at the same time, without having to use any of the controls. This is just like having a telephone conversation. The only controls you may wish to use are the mute buttons to turn off the sound, and the sliders, to adjust the input/output volume levels. This mode requires that the client PC has a sound card with support for full-duplex audio. If your available bandwidth is 0.
AXIS 241QA/AXIS 241SA - Audio If t the sound input is too low or high, it is possible to adjust the input gain for the microphone attached to the AXIS 241QA/AXIS 241SA. Select the desired audio Encoding format, G711, G726. Depending on the selected encoding, set the desired Bit rate (audio quality). The settings depend on the available bandwidth and the required audio quality, that is, a high bit rate setting requires more bandwidth.
AXIS 241QA/AXIS 241SA - Audio When the incoming sound is louder than the threshold, it will pass without any change. When lower than the threshold, the incoming sound is reduced by a certain attenuation factor. The threshold value should be set higher than the background noise, but lower than the useful audio. The noise canceller threshold value can be set to High, Medium High, Medium low and Low. A lower threshold will allow most of the audio to pass. Only the weakest background noise is reduced.
AXIS 241QA/AXIS 241SA - Live View Config Live View Config Layout These are the tools for deciding the layout of the Live View page. The layout can be set in two ways: • Use Axis look - the layout is unchanged. • Use custom settings - modify the default page with your own colors, and images. Click the Configure button to view the options. The other settings on this page relate to buttons and links to include in the Live View page. See page 30 for more information.
AXIS 241QA/AXIS 241SA - Live View Config Customizing the default page The appearance of the default AXIS 241QA/AXIS 241SA Live View page can be customized to suit your own requirements, or you can upload and use your own home page. To upload your own files, click the Upload/Remove button and see the description below. Note that the setup address is http:///operator/basic.
AXIS 241QA/AXIS 241SA - Live View Config Modify the Axis Look Select the background and text colors from the drop-down lists. To add a background picture, a banner and/or a logo, select your uploaded file or specify the location of an external file as described above. Banners and logos can also be linked to web addresses. Include a title to be shown above the video stream and/or a description displayed below the video stream.
AXIS 241QA/AXIS 241SA - Live View Config User-defined Links Enter a descriptive name and the URL in the field provided. The link appears on the Live View page. User defined CGI links can be used to issue HTTP API requests, such as PTZ commands. Example: 1. Check Show Custom Link 1 2. Enter a descriptive name, such as CAM1 Start PTZ. 3. Enter the cgi link: http://192.168.0.125/axis-cgi/com/ptz.cgi? camera=1&continuouspantiltmove=30,-30 4. Check Show Custom Link 2. 5.
AXIS 241QA/AXIS 241SA - Live View Config External Video You can add links to other Axis network devices available over the network. These sources can be displayed on the Live View page, just as if they were video sources connected directly to the AXIS 241QA/AXIS 241SA. Click the Add... button to open the External Video Source Setup dialog, and define the necessary settings. Example of a path to an external video source: http://192.168.0.125/axis-cgi/mjpeg/video.
AXIS 241QA/AXIS 241SA - Pan Tilt Zoom Pan Tilt Zoom Installing PTZ devices The AXIS 241QA/AXIS 241SA supports several PTZ devices. Please see www.axis.com for a complete list of supported devices, and to obtain the correct driver. Follow the instructions below to install a PTZ device: 1. Using an appropriate cable, connect the device to your selected port (RS-232 or RS-485). These ports are available via the D-Sub connector and the I/O terminal connector, respectively.
AXIS 241QA/AXIS 241SA - Pan Tilt Zoom PTZ configuration Once PTZ has been installed for the AXIS 241QA/AXIS 241SA, PTZ Configuration now appears in the menu to the left with the following sub menus. Preset positions A preset position is a pre-defined camera view than can be used to quickly move the camera to a specific location. From Preset Position Setup, use the Pan, Tilt and Zoom (PTZ) controls to steer the camera to the required position.
AXIS 241QA/AXIS 241SA - Pan Tilt Zoom PTZ controls If the AXIS 241QA/AXIS 241SA has been appropriately configured, the Live View page will display the controls available for the installed PTZ device. The administrator can enable/disable the controls for specified users. Video sources Tilt bar (relative) The exact controls shown depend on the make and model of PTZ device.
AXIS 241QA/AXIS 241SA - Pan Tilt Zoom In contrast, when using an absolute driver, each position on the bar (see right) represents a defined position in the device’s range of movement, with the center of the bar representing the point midway between the two extremes of movement. Clicking a position directly on the bar moves the camera directly to the new position in one smooth movement. Clicking on the arrows at the ends of a bar causes a stepped, incremental change.
AXIS 241QA/AXIS 241SA - Pan Tilt Zoom Preset positions Also available with many PTZ devices are Preset positions. These presets are selected from the drop-down Source list on the Live View page and will move and/or zoom the camera to a pre-defined position, that is to cover an area of particular interest. Events can also be configured to go to preset positions when triggered. For information on setting up preset positions, please see Preset positions, on page 33 and the online help.
AXIS 241QA/AXIS 241SA - Pan Tilt Zoom OSD Menu - If the PTZ unit supports an internal configuration menu, this can be accessed using the On-Screen Display (OSD). Configure the analog camera by opening and navigating through its internal menu in this display. PTZ control queue Use the PTZ control queue window to enable and disable PTZ queueing.
AXIS 241QA/AXIS 241SA - Pan Tilt Zoom The order of priority for taking control of the queue is as follows: 1. Administrators - an administrator takes over PTZ control regardless of who is first in queue. The administrator is removed from the queue 60 seconds after their last PTZ control command. 2. Event - the AXIS 241QA/AXIS 241SA can be set up to take control of the queue and move to a specific position for 20 seconds when triggered by an alarm.
AXIS 241QA/AXIS 241SA - Event configuration Event configuration This section describes how to configure the AXIS 241QA/AXIS 241SA for alarm handling. Various actions can be configured to run when certain types of events occur.
AXIS 241QA/AXIS 241SA - Event configuration Event types An event type is a set of parameters describing how and when the video server is to perform certain actions. Example: If somebody walks past the connected camera, and an event has been configured to act on this, the video server can record and send video images to an FTP server, or send a notification email to a pre-configured email address with a pre-configured message. Video images can be sent as an attachment with the email.
AXIS 241QA/AXIS 241SA - Event configuration Pre-trigger and post-trigger buffers This function is useful when checking to see what happened immediately before and after a trigger, e.g. two minutes before and after a door was opened. Check the Upload images option under Event Types > Add Triggered... > When triggered... to see available options. Include pre-trigger buffer - images stored internally in the server from the time immediately preceding the trigger.
AXIS 241QA/AXIS 241SA - Event configuration Camera tampering The camera tampering application generates an alarm whenever the camera is repositioned, or when the lens is covered, sprayed, or severely defocused. You must also create an event, (see How to set up a triggered event, on page 40) for the camera to send an alarm.
AXIS 241QA/AXIS 241SA - Event configuration Motion detection In the Motion Detection menu, you can configure the video source(s) for motion detection. The motion detection feature is used to generate an alarm whenever movement occurs (or stops) in the image. The AXIS 241QA/AXIS 241SA can use a maximum of 10 Include/Exclude windows.
AXIS 241QA/AXIS 241SA - Event configuration 7. details). Any detected motion within an active window is then indicated by red peaks in the Activity window (the active window has a red frame). 8. Click Save. If there are parts of the Include window that you wish to exclude, click the Configure Excluded Windows radio button and perform steps 1-6 above. Click Save. Please use the online help for descriptions of each available option.
AXIS 241QA/AXIS 241SA - System options System options Security User access control is enabled by default, when the administrator sets the root password on first access.
AXIS 241QA/AXIS 241SA - System options Note that users from IP addresses that will be allowed must also be registered with the appropriate access rights (User, Operator or Administrator). This is done from Setup > System Options > Security > Users.
AXIS 241QA/AXIS 241SA - System options Please refer to the home page of your preferred CA for information on where to send the request.
AXIS 241QA/AXIS 241SA - System options IEEE 802.1X IEEE 802.1x is an IEEE standard for port-based Network Admission Control. It provides authentication to devices attached to a network port (wired or wireless), establishing a point-to-point connection, or if authentication fails, preventing access on that port. 802.1x is based on EAP (Extensible Authentication Protocol). In a 802.
AXIS 241QA/AXIS 241SA - System options From the Time Mode section, select the preferred method to use for setting the time: • Synchronize with computer time - sets the time from the clock on your computer. • Synchronize with NTP server - the video server obtains the time from an NTP server every 60 minutes. Specify the NTP server's IP address or host name. Note: Note that if using a host name for the NTP server, a DNS server must be configured under TCP/IP settings.
AXIS 241QA/AXIS 241SA - System options Notes: • • The ARP/Ping service is automatically disabled two minutes after the unit is started, or as soon as an IP address is set. Pinging the unit will still be possible when this service is disabled. AXIS Internet Dynamic DNS Service - If the AXIS 241QA/AXIS 241SA has been registered with the Axis Internet Dynamic DNS service and the IP address for the product changes, the service is updated to reflect the change.
AXIS 241QA/AXIS 241SA - System options Link-Local address IPv4 Address This is enabled by default and assigns the AXIS 241QA/AXIS 241SA an additional IP address for use with UPnP™. The AXIS 241QA/AXIS 241SA can have both a Link-Local IP and a static or DHCP-supplied IP address at the same time - these will not affect each other. HTTP The default HTTP port number (80) can be changed to any port within the range 1024-65535. This is useful for simple port mapping.
AXIS 241QA/AXIS 241SA - System options SOCKS SOCKS is a networking proxy protocol. The AXIS 241QA/AXIS 241SA can be configured to use a SOCKS server to reach networks on the other side of a firewall/proxy server. This function is useful if the video server is located on a local network behind a firewall, but notifications, uploads, and alarms need to be sent to a destination outside the local network (such as the Internet).
AXIS 241QA/AXIS 241SA - System options If the mail server requires SMTP authentication, check the box for Use authentication to log in to this server and enter the user name and password used for logging in. Several different methods of authentication are available. See the online help for more information. SNMP The Simple Network Management Protocol (SNMP) allows the remote management of network devices. Select the version of SNMP to use, depending on the level of security required.
AXIS 241QA/AXIS 241SA - System options Ports & devices I/O Ports - the pinout, interface support and the control and monitoring functions provided by this connector are described in Unit connectors, on page 57. RS232 - The COM port RS-232 on the AXIS 241QA/AXIS 241SA supports several operational modes listed on this page. For more information, please see COM ports RS-232 and RS-485, on page 59. RS485 - The COM ports on the AXIS 241QA/AXIS 241SA supports several operational modes listed on this page.
AXIS 241QA/AXIS 241SA - System options Information - The Log report and the Parameter List also provide valuable information for troubleshooting and when contacting Axis support service. Configuration: Log Level for Log Files - from the drop-down list, select the level of information to be added to the Log file Log Level for Email - from the drop-down list, select the level of information to send as email and enter the destination email address.
AXIS 241QA/AXIS 241SA - System options Resetting to the factory default settings To reset the AXIS 241QA/AXIS 241SA to the original default settings, go to the System Options > Maintenance web page (described in Maintenance, on page 54) or use the control button on the AXIS 241QA/AXIS 241SA, as described below: Using the Control Button Follow the instructions below to reset the AXIS 241QA/AXIS 241SA to the factory default settings using the Control Button. 1.
AXIS 241QA/AXIS 241SA - Unit connectors Unit connectors The following connectors are described in this section: • The D-Sub connector, on page 57 • The I/O terminal connector, on page 58 • COM ports RS-232 and RS-485, on page 59 The D-Sub connector The AXIS 241QA/AXIS 241SA provides one 9-pin D-Sub connector, providing the physical interface for an RS-232 port, used for connecting accessory equipment; such as standalone PTZ devices for the remote control of connected video cameras.
AXIS 241QA/AXIS 241SA - Unit connectors The I/O terminal connector This section describes the pinout and interface support provided by the 12-pin I/O terminal connector, which includes: • • • • 4 digital transistor outputs 4 digital inputs an RS-485 interface auxiliary power and GND The terminal connector is used in applications for e.g. motion detection, event triggering, time lapse recording, alarm notification via email, image storage to FTP locations, etc. • Inputs - e.g. a push button.
AXIS 241QA/AXIS 241SA - Unit connectors Schematic diagram - I/O terminal connector Switch Mode Power Supply 3.3V + o Power adapter (9W) o z 1 o GND 2 o e.g.
AXIS 241QA/AXIS 241SA - Unit connectors
AXIS 241QA/AXIS 241SA - Troubleshooting Troubleshooting Checking the firmware Firmware is software that determines the functionality of the AXIS 241QA/AXIS 241SA. One of your first actions when troubleshooting a problem should be to check the currently installed version. The latest version may contain a correction that fixes your particular problem. The current firmware version in your AXIS 241QA/AXIS 241SA can be seen under Setup > Basic Configuration.
AXIS 241QA/AXIS 241SA - Troubleshooting Emergency recovery procedure If power or the network connection to theAXIS 241QA/AXIS 241SA is lost during the upgrade, the process will fail and the unit will become unresponsive. A flashing red Status LED indicates a failed upgrade. To recover the unit, follow the steps below. The serial number is found on the underside label on the product casing. 1.
AXIS 241QA/AXIS 241SA - Troubleshooting Symptoms, Possible Causes and Remedial Actions Problems setting the IP address Using ARP/Ping - the IP address Restart the server and try again. Ensure also the ping length is set to 408. (See the AXIS must be set within two minutes 241QA/AXIS 241SA Installation Guide) after power has been applied to the video server The video server is located on a different subnet.
AXIS 241QA/AXIS 241SA - Troubleshooting No images displayed in the Web interface Problem with AMC (Internet Explorer only) To enable the updating of images in Microsoft Internet Explorer, set your browser to allow ActiveX controls. Also, make sure that AXIS Media Control (AMC) component is installed on your workstation.
AXIS 241QA/AXIS 241SA - Troubleshooting Poor rendering of MPEG-4 images. Color depth set incorrectly on clients. Set to 16-bit or 32-bit color. If text overlays are blurred, or if there are other rendering problems, you may need to enable Advanced Video Rendering. This is done on the MPEG-4 tab in the AMC control panel applet. Ensure that your graphics card is using the latest device driver. The latest drivers can usually be downloaded from the manufacturer's web site.
AXIS 241QA/AXIS 241SA - Technical specifications Technical specifications Item Specification Models • AXIS 241QA: Four video channels, two-way audio • AXIS 241SA: One video channel, two-way audio * Also available as Blade versions for Axis Video Rack Solution Video compression • Motion JPEG • MPEG-4 Part 2 (ISO/IEC 14496-2), Profiles: ASP and SP Resolutions • Resolutions 4CIF, 2CIFExp, 2CIF, CIF, QCIF • max 704x480 (NTSC) 704x576 (PAL) • min 160x120 (NTSC) 176x144 (PAL) Frame rate (NTSC/PAL) •
AXIS 241QA/AXIS 241SA - Technical specifications Item Connectors Specification • Analog composite video, • NTSC/PAL autosensing inputs: • AXIS 241QA: 4 BNC inputs • AXIS 241SA: 1 BNC input and 1 BNC output: loop through or Y/C video input • Ethernet 10BaseT/100BaseTX, RJ-45 • Terminal block: 4 alarm inputs, 4 alarm outputs, RS-485/422 half duplex port, Alternative power connection • D-Sub for RS-232 port • AXIS AXIS 241QA/AXIS 241SA: 3.5 mm jack for Mic in (max 54 mVpp) or Line in (max 8.0 Vpp, mono), • 3.
AXIS 241QA/AXIS 241SA - Technical specifications Item Specification Included accessories • Power supply 9 V DC, mounting brackets, connector kit, Installation Guide, CD with installation and management tools, software and User’s Manual, MPEG-4 licenses (1 encoder, 1 decoder), MPEG-4 decoder (Windows) Applications (not included) • AXIS Camera Station - Surveillance application for viewing, recording and archiving up to 25 cameras • AXIS Camera Recorder - Surveillance application for viewing and recor
AXIS 241QA/AXIS 241SA - Technical specifications General performance considerations When setting up your system, it is important to consider how various settings and situations will affect performance. Some factors affect the amount of bandwidth (the bit rate) required, others can affect the frame rate, and some will affect both. If the load on the CPU reaches its maximum, this will also affect the frame rate.
AXIS 241QA/AXIS 241SA - Technical specifications Important! • • The figures displayed here are the values as delivered by the server. If other restrictions are currently in force, (e.g. bandwidth limitation) these values might not correspond to those actually received by the client. For Motion JPEG, these values will only be accurate as long as no frame rate limit has been specified.
AXIS 241QA/AXIS 241SA - Technical specifications Bandwidth As there are many factors affecting bandwidth, it is very difficult to predict the required amounts. The settings that affect bandwidth are: • • • • • • • the image resolution the image compression the frame rate the MPEG-4 object type the MPEG-4 GOV structure the analog cameras connected to the video server the audio settings There are also factors in the monitored scene that will affect the bandwidth.
AXIS 241QA/AXIS 241SA - Glossary Glossary Active Speaker - a speaker with a built-in power amplifier. ActiveX - ActiveX is a standard that enables software components to interact with one another in a networked environment, regardless of the language(s) used to create them. Web browsers may come into contact with ActiveX controls, ActiveX documents, and ActiveX scripts. ActiveX controls are often downloaded and installed automatically as required.
AXIS 241QA/AXIS 241SA - Glossary CCD (Charged Coupled Device) - This light-sensitive image device used in many digital cameras is a large integrated circuit that contains hundreds of thousands of photo-sites (pixels) that convert light energy into electronic signals. Its size is measured diagonally and can be 1/4", 1/3", 1/2" or 2/3".
AXIS 241QA/AXIS 241SA - Glossary Dome network camera - A remotely controllable camera mounted in a special housing, characterized by the dome shaped glass or plastic covering behind which the camera resides. Usually mounted on a ceiling and looking downwards, a dome camera can often rotate up to 360 degrees, thus providing excellent coverage of large areas. Duplex - See Full-duplex.
AXIS 241QA/AXIS 241SA - Glossary type of images (I-VOPs or P-VOPs) included in the stream, and their internal order. See also GOV and VOP. Half-duplex - See Full-duplex. connection between the communication end-points, packets can be sent via different routes and do not need to arrive at the destination in the correct order. HTML (Hypertext Markup Language) - HTML is the set of "markup" symbols or codes inserted in a file intended for display in web browser.
AXIS 241QA/AXIS 241SA - Glossary JPEG (Joint Photographic Experts Group) - Together with the GIF file format, JPEG is an image file type commonly used on the web. A JPEG image is a bitmap, and usually has the file suffix '.jpg' or ".jpeg." When creating a JPEG image, it is possible to configure the level of compression to use. As the lowest compression (i.e. the highest quality) results in the largest file, there is a trade-off between image quality and file size.
AXIS 241QA/AXIS 241SA - Glossary NVR (Network Video Recorder) - A dedicated Network Video Recorder (NVR) can be used to gather data streams from remote network cameras and video servers and store them on a hard disk. An NVR can be a standard networked PC, or a dedicated video recording hard disk server with its own software application.
AXIS 241QA/AXIS 241SA - Glossary RS-232 - A long-established standard that describes the physical interface and protocol for low-speed serial data communication between devices. This is the interface that e.g. a computer uses to talk to and exchange data with a modem and other serial devices. RS-422 - A serial data communication protocol that specifies 4-wire, full-duplex, differential line, multi-drop communications.
AXIS 241QA/AXIS 241SA - Glossary 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.
AXIS 241QA/AXIS 241SA - Glossary VPN (Virtual Private Network) - This creates a secure "tunnel" between the points within the VPN. Only devices with the correct "key" will be able to work within the VPN. The VPN network can be within a company LAN (Local Area Network), but different sites can also be connected over the Internet in a secure way. One common use for VPN is for connecting a remote computer to the corporate network, via e.g. a direct phone line or via the Internet.
AXIS 241QA/AXIS 241SA - Index 81 Index A Action 39 Action buttons 30 Active/Inactive 11 Administrators 17, 45 Advanced TCP/IP settings 50 Alarm 39, 43, 58 Allowed IP addresses 45 AMC Viewer Toolbar 12 Anonymous viewers 45 ARP/Ping 49 Audio input 24 Audio mode 23 Audio output 25 Audio settings 23 Audio transmission 16 AXIS Internet Dynamic DNS Service 50 AXIS Media Control (AMC) 14 B Backup 54 Bandwidth 13, 71 Basic TCP/IP settings 49 Buffers 41 C E Email server 52 Emergency recovery 62 Enable ARP/Pin
AXIS 241QA/AXIS 241SA - Index M Maximum bandwidth 51 Motion detection 42 Motion JPEG 13, 16 MPEG-4 13, 16 MPEG-4 clients 16 MPEG-4 protocols 14 MPEG-4 settings 53 Multicasting 14 Restart 54 Restore 54 RS-232 connector 8 RS-485 58 RTP 14, 53 RTSP 14, 51 S O Operators 46 Output buttons 11 Overlays 19 Overview 5 Own home page 29 Own web files 28 Scheduled event 39 Security 45 Sequence mode 11, 31 Services 49 Simplex 23 SMTP settings 52 Snapshot 11 SOCKS server 52 Specifications 66 Streaming MPEG-4 14
AXIS 241QA/AXIS 241SA - Index 83 Video streams 13, 15, 19
