1. Analog system.The system used since the CCTV system, CCTV system, devised a system that uses Analog signal cable (Coax cable) cable RG6, RG11.AdvantagesCost: the cost that has a lock system is cheaper than another system IP.More flexible: because there is a wide variety of cameras available, ranging from small to large system system with infrared cameras with area provide options for different types of usage appropriately.Compatibility: the loc system is just another PAL and NTSC signals only. Makes it possible to select different cameras together in the same system.Little problem: because it is an analog system was developed so that is almost in the final moments of the loc system technology, Anaheim. Cause of problems has been edited to. Problems of analog systems, it happens very little.The mechanic installs do not have knowledge of a network, network policy settings may also be installed.The disadvantagesFunction: System lock not listening to another station, as well as IP cameras with analogue cameras, except for very high price only.Security: the analog system is less secure because there is no encryption of data, regardless of whether anyone can view images from CCTV cameras.Distance: unable to support send the contract in terms of sight.The resolution of the image is not so much due to the Analog system is unable to send high-definition video, because of restrictions on the wires.2. the system of IP (Network)CCTV systems are used instead of Analog systems, where the IP system sends signals in Digital format makes the picture sharper. Signal loss does not occur is if there is an error getting system image, it will not show up at all, but if the system correctly, images are obviously based on the quality of the camera that sends images from Analog systems, unlike the photos will have the entire image sharp. Picture blurry and missing images. The cable is used in Digital systems, most are Cat5 cable is.AdvantagesWireless: supports WiFi system works over AnalogOriginal network: IP camera can be used in conjunction with an existing LAN environment without having to travel. The new cables.The camera is very easy to add: If you want to add a camera can do this easily. Without the stick constraint on the part of the limited Channel DVR anymore.High efficiency: because each IP camera work independent Do not send pictures to processing the camera makes picture quality "that" no restraint that DVR anymore.Each has its own IP settings for each camera is simple;Resolution: because it is a Digital system, you can skip the Analog system constraints, this is not possible, that is, across from 576 TVL to 1080p or "Hidefinition" make images with a resolution "very high" compared with Analog systems is that we see a movie from an ordinary Digital VDO system is comparable to a Blue-ray movies at the same time.POE: some models can be delivered with LAN cable wires without increasing travel further separation separately.High security: because it works on the system's ability to Backup data on a Digial Server at any time, and Hacker is unable to "trap" remove data between.The disadvantagesTransmission: because it uses very high, ranging from 500 kbps to Brandwidth 1.5 Mbps makes the system work harder.Costs: expenses are higher than Analog systems. Whether it is equipment, maintenance, but they are likely to decline from before.Use the jump brand is not: because the system has been developed from many make more than 1 standard, it cannot use different Protocal to contact each other, or simply as "cross-brand is not" enough.Integrators need Network knowledge, including knowledge of data management.3. the HD-SDI system.CCTV the SDI Serial Digital Interface stands as a Digital system that used wires. The signal is the same RG6 Coax or conductive signal. This system is capable of transmitting images without the need to compress the signal, because the system that serves to send a signal that has a resolution greater than the resolution. 5 x plain to make sharp picture signal in HD.AdvantagesCan use the system's original Analog signal cables have made savings in Upgrade?High-contrast images.Installer does not require expertise in network systems.The disadvantagesThe price of the camera and the recorder has a price, but it was captured by sungo likely reduced.The camera also has a small phlitklongwongchon off those not yet produced in large systems.
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