IP surveillance have no limited in scalability and can be from one to thousands of units,IP surveillance also can supply unlimited real-time user selctable frame rate output.More coat-effective infrastructure: Most of existing device by twisted-pair access, which for IP surveillance a good preparation and only access network line can easily get all. Remote controlled: All the video information no meter real-time or recorded, you can get it for anywhre.Intelligent cameras: dynamic monitoring, emergency management、alarm input、delay output、log management and other built-in feature allows camera can be intelligent choose when send the information and give who, even can choose what frame rate and resolution to send.Lower system cost: IP surveillance system is the most most economical choice, it based on standard network protocol, which make it compare to the DVR advantage to be prominent. Restore image information only need a hard disk, it is very easy install and maintain.

Any kind of new technology and followed promotion will be a period time to adapt the market, also called market education period. The new technology more complex or with the existing technology distance more lager so the market education period is more longer, during this time we should take means of step-by-step gradually learn more knowledge of IP surveillance, only in this way we can eliminate some misconceptions and confused. IP surveillance is undoubtedly a complex new technology especially the inside IP part of it which take the traditional security concept to IT area. In this sense, new technology is faced both opportunities and challenges. In fact the direct competitors of IP surveillance is DVR, DVR make people mistakenly believe it is represent the most mature technology.

No. The camera works fine also in local network without the internet connection. If the remote users are in the same local network, it’s not necessary to connect the IP cameras to the internet.

Network Video Server (DVS), IP CAMERA (IPCAM).

Closed-circuit television (CCTV) is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors

IP CAMERAAn Internet protocol camera, or IP camera, is a type of digital video camera commonly employed for surveillance, and which unlik analog closed circuit television (CCTV) cameras can send and receive data via a computer network and the Internet. Although most cameras that do this are webcams, the term "IP camera" or "netcam" is usually applied only to those used for surveillance.A video server is a computer based device (also called a "host") dedicated to delivering video.A digital video recorder (DVR), sometimes referred to by the merchandising term personal video recorder (PVR), is a consumer electronics device or application software that records video in a digital format to a disk drive, USB flash drive, SD memory card or other local or networked mass storage device.

Wireless security cameras are closed-circuit television (CCTV) cameras that transmit a video and audio signal to a wireless receiver through a radio band. Many wireless security cameras require at least one cable or wire for power; "wireless" refers to the transmission of video/audio. However, some wireless security cameras are battery-powered, making the cameras truly wireless from top to bottom.

NVRs are similar to DVRs but with several distinct differences. An NVR's video input is from a network, as opposed to a direct connection to a video capture card or tuner. The main distinction being video on a DVR is encoded and processed at the DVR, while video on an NVR is encoded and processed at the camera, then streamed to the NVR for storage or remote viewing.

1 Centralized IP cameras, which require a central Network Video Recorder (NVR) to handle the recording, video and alarm management.2 Decentralized IP cameras, which do not require a central Network Video Recorder (NVR), as the cameras have recording functionality built-in and can thus record directly to digital storage media, such as flash drives, hard disk drives or network attached storage.

Failure-resistant (systems that protect against loss of data due to drive failure).Failure-tolerant (systems that protect against loss of data access due to failure of any single component).Disaster-tolerant (systems that consist of two or more independent zones, either of which provides access to stored data).

IP cameras can be used in professional security systems and enable live video to be viewed remotely by authorized personnel. The IP cameras are easily integrated into larger, complex systems, but can also function as stand-alone solutions in entry-level surveillance applications. IP cameras can be used for surveillance of sensitive areas, such as buildings, casinos, banks and shops. Video of those areas can be monitored from relevant control rooms, at police stations and by security managers from a variety of locations. IP cameras are also effective substitutes for analog cameras in traditional law enforcement applications, such as keeping public places safe. IP cameras can be used for access control. People as well as vehicles can be recorded with time stamps that are easy to locate and review. The images can be stored in a remote location, making it impossible to steal the information.

RAID (redundant array of independent disks, originally redundant array of inexpensive disks)is a storage technology that combines multiple disk drive components into a logical unit.

The "Digital Time Code Embedded" function is embedded in MPEG data stream. Therefore, the exact time each frame is recorded will be stored. It is very useful when users want to find the video at an exact time or a certain time interval. If an IP camera doesn?⑩t support this function, users have to search for the whole video stream by looking through the video, which takes a lot of time. Some cameras provide software solution to simulate this function. However, this is not as accurate. Video streams with Digital Time Code Embedded are so-called "Smart Video", and can enable a lot of useful applications at client site. The other advantage of Digital Time Code Embedded is that it provides watermark on the video streams. Since the time code is written in the video stream, if the video is modified by others, the time code will disappear from the video stream, and therefore, the time code can act lik a watermark for the video stream and users will find if the video is modified by unauthorized people.

Dynamic DNS or DDNS is a method of updating, in real time, a Domain Name System (DNS) to point to a changing IP address on the Internet. This is used to provide a persistent domain name for a resource that may change location on the network.

If an IP camera can support DDNS (Dynamic Domain Name Server), users can set the IP camera at a virtual domain name (such as cam1.kitchen.Taipei.xxx.xxx) at dynamic IP, and be able to view this IP camera anywhre that has access to the internet.