DETEXI® Network Video Management System
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— DETEXI IP-Surveillance Planning – System Scalability — Overview —
System Scalability
A system that grows with your needs
There are two challenges that video surveillance systems are facing today, namely scalability and reliability. Large organizations that have multiple sites in local or remote locations could have from ten to over a thousand cameras to manage.
Scalability varies according to the type of system chosen, and must therefore be considered at the design stage of a network video management system.
Scalability Steps
A DVR system is usually supplied with 4, 9 or 16 camera inputs, therefore becomes scalable in steps of 4, 9 or 16. If a system includes 15 cameras, this is not an issue, but it becomes a problem if 17 cameras are needed. Adding one single camera would generate the need for an additional DVR.
  • Network video management systems are far more flexible, and can be scaled in steps of one camera at a time.
Frame Rate Control
Network video allows for frame rate control, while in the case of analog video, all video is sent from the camera all the time. Frame rate control in network video systems means that the network camera/video server only sends images at the specified frame rate; that is, no unnecessary frames are transferred over the network.
  • The network camera/video server or video management software can be configured to raise this frame rate if, for example, activity is detected.
  • It is also possible to send video with different frame rates to different recipients — a benefit especially when using low bandwidth links to remote locations.
Number of Cameras per Recorder
In a network video management system, a PC server records and manages the video. The PC server can be selected according to the performance needed.
  • Performance is often specified as number of frames per second, total for the system. If 30 fps is needed for each camera, one server may only record about 25 cameras. If 2 fps is sufficient, 300 cameras can be managed by one server. This means that the performance of the system is used efficiently and can be optimized.
Size of System
For larger installations, a network video management system is easy to scale. When higher recording frame rates or longer recoding times are needed, more processing and/or memory capacity can be added to the PC server managing the video.
  • Even more simply, another PC server can be added, located either at a central location, or at remote locations.

— DETEXI IP-Surveillance Planning – System Scalability — Distributed NVR Network —
System Scalability
Distributed NVR Network — NVR Domain
Taking a cue from existing computer network topologies, a NEW, exciting approach to digital video surveillance management and control has been developed — the Network Video Recorder Domain model — to address scalability and reliability.
Distributed NVR Network — DETEXI NVR Domain
DETEXI security installation has the ability to scale from small business use to enterprise level security operations. With a number of cameras sending information over a long period of time, the only way to deal adequately with the shear volume of files is to share the load over a distributed NVR network.
NVR network consists of several NVRs that are logically attached to the main NVR — DETEXI NVR Domain Controller. Thus, it is possible to control every NVR remotely from the NVR Controller.

Each particular NVR is responsible for its group of cameras and carries the task of recording, touring and alarming functions. NVR Controller learns everything about the NVR’s in the NVR network and their group of cameras.
Monitoring Centers
The DETEXI NVR Domain Controller is the core component for multi-site connectivity. It is indispensable solution for complex distributed environments and monitoring centers.
— DETEXI IP-Surveillance Planning – System Scalability — DETEXI NVR Domain Controller —
System Scalability
DETEXI NVR Domain Controller
The central administration point of the distributed network of NVRs or NVR domain is the DETEXI NVR Domain Controller — part of the DETEXI software.
  • NVR Domain Controller allows to consider the whole NVR Domain consisting of several NVRs as one powerful NVR. Each particular NVR from the domain will be responsible only for recording its own set of cameras and searching its own archive.
  • NVR Domain Controller will authenticate all clients’ access — connections from computers viewing cameras — via the local area network, or the Internet. Domain Controller only needs to maintain the user list. It is not necessary to have a user list for each particular NVR in domain. This centralizes user access control and database management.
  • NVR Domain Controller allows us to consider each particular NVR in the domain like a computer without keyboard, mouse and monitor. The IGLOO * is a good example for this. We can have set of Internet addressable igloos we can remotely control and search.
  • * The IGLOO mobile technical solution is a specialized enclosure and power distribution system designed specifically for outdoor IT deployments. The IGLOO was born out of a need to provide protection for wireless radio equipment, network video equipment and computer systems in extreme climatic conditions.
  • NVR Domain Controller makes the whole system highly scalable and capable to record from ten to hundreds of cameras. Just add one more NVR in the domain and assign a new set of cameras to it. If you have two or more NVRs in different locales, you should explore upgrading with this module.
Scale from small business use to enterprise level security operations
To expand your current security installation to NVR Domain configuration, buy multi-site connectivity licenses
Thus, it becomes possible to control NVR network — the group of several NVRs that are logically attached to the main NVR remotely from the NVR Controller.
If 5 NVRs logically attached to the main NVR are required you’ll need to buy 5 remote site licenses.