VisorDISK

During 2004, Telsec released the VisorDISK product line, network video and audio recording servers that add local and remote recording capabilities to its VisorNET video and audio transmission units. The VisorDISK units have been designed to hold up to two standard IDE hard drives, which with today's standards means that each VisorDISK can hold up to 0.5 Terabytes (500GB) of storage space for digital audio and video recording purposes.

The VisorDISK is an NVR (Network Video Recorder) that has been designed to receive and archive any audio or video stream coming from the VisorNET transmission equipment. The VisorNET handles all camera and audio inputs, compressing all the information and transmitting it through the network for monitoring (to a central location that will receive video alarms as well as live video and audio) or archiving purposes (to a VisorDISK unit).

Being a Network Video Recorder allows the VisorDISK to be ANYWHERE in the network and not necessarily in the same location than the transmission units. Moreover, one single VisorDISK can serve and handle multiple VisorNET transmission units.

For larger centralized recording applications, where a large number of transmission equipment is sending information simultaneously to the central for archiving purposes, the VisorDISK system can be installed in "state of the art" hard drive servers that will hold up to 4 Terabytes of storage space.

1.	No need to wire all cameras to a central point: With traditional DVRs all cameras had to run into the DVR which would typically be at a central location. With the VisorNET/VisorDISK system, cameras only need to be wired to the closest VisorNET, allowing for a distributed architecture (ideal for large setups such as airports, campus, office buildings, malls....).
2.	Better usage of your hard drive space: With the VisorDISK NVR approach, a very large number of cameras can share the same hard drives thus making a better usage of the storage space, specially in event driven or activity driven recording scenarios.
3.	Easy central maintenance: Digital recording systems do require some level of maintenance, specially in what hard drives are concerned (hard drive failures, defragmentation...). With the VisorDISK network video recording solution, all storage media con be installed in one central location, thus easing all maintenance operations.
4.	Higher reliability: Hard drive failure problems and maintenance issues are much higher that those of a stand alone, non-PC based video transmission unit like the VisorNET equipment. By separating the VisorNET video transmission equipment from the VisorDISK network recording server, you are ensuring that regardless any maintenance or hard drive related issues there might be, your video security system is going to be running, sending video alarms and live video to the monitoring site or center.
5.	Higher level of security for the recording media: The VisorDISK units can be installed anywhere in the network, in a different place than the cameras or the transmission units. This allows to place the VisorDISK in a more secluded and higher security place than the rest of the equipment, increasing the safety of all recorded information.
6.	Recordings are not exposed to the network: The VisorDISK units do not need to be directly exposed to the network. Unlike many other NVR solutions, Telsec's VisorDISK is programmed to be accessed through the VisorNET transmission equipment. This means that the recordings are not directly accessible to the network and are not exposed to the attacks of hackers who target PC based systems.
7.	Local recording backup option: Telsec has designed its VisorNET and VisorDISK unit to solve one of the most talked about issues with centralized NVR systems: "And what if the internet is down?". In this case, a local and economic VisorDISK can be installed on-site with enough hard drive space to archive all video for several hours and until the internet connection is restored. At that point in time all recordings will be uploaded through the network and to the central VisorDISK server.