DVRs are used to record and store video from analog CCTV cameras. They convert the analog signal into a digital format, allowing for easier storage and playback of footage.

DVR systems are typically connected to analog or HD-TVI (High Definition Transport Video Interface) cameras through coaxial cables. The DVR records the footage onto a hard drive for later retrieval and viewing. DVRs work with analog video cameras, which capture and send footage to the system.

NVR systems are used with IP cameras (Internet Protocol cameras), and they record and store video footage from these cameras over a network. NVRs are commonly used in modern CCTV systems due to their higher video quality and scalability.

NVR systems connect to IP cameras over a local area network (LAN) or the internet. Unlike DVRs, the recording process occurs digitally from the camera’s footage, which is already in a digital format, meaning that the system does not need to convert an analog signal.

A Dome Camera is a type of surveillance camera that is typically housed in a dome-shaped casing. This design offers several advantages, such as being discreet and hard to tamper with. The dome shape allows the camera to be mounted on ceilings, providing 360-degree coverage in some cases. Dome cameras are commonly used in both indoor environments, often in places where aesthetics and a low profile are important. 

Types of Dome CCTV Cameras

1. Fixed Dome Cameras:

   • Description: These cameras have a fixed lens and provide a consistent, unchanging view of a designated area.

   • Use: Suitable for monitoring smaller areas or spaces where the camera does not need to be adjusted or re-positioned.
     
     

2. PTZ Dome Cameras (Pan-Tilt-Zoom):

   • Description: These cameras are more advanced, allowing for remote control of pan, tilt, and zoom functions. This means the camera can be moved in various directions and zoomed in on specific areas for closer inspection.

   • Use: Ideal for large areas where detailed, real-time adjustments to the camera's view are necessary.
     
     

3. Infrared (IR) Dome Cameras:

   • Description: These cameras come with infrared LEDs around the lens, allowing for clear night vision and surveillance in low-light or no-light environments.

   • Use: Perfect for nighttime surveillance or places with poor lighting.
     
     

4. HD or IP Dome Cameras:

   • Description: These cameras offer higher resolution (often HD or 4K) and transmit video over a network (Ethernet or Wi-Fi) rather than through traditional coaxial cables. IP cameras typically offer more flexibility in terms of integration with modern security systems.

   • Use: Ideal for situations requiring high-resolution footage or where remote monitoring is needed.
     
     

5. Vandal-Proof Dome Cameras:

   • Description: These dome cameras are designed with strong, tamper-resistant casings, making them ideal for environments where there is a risk of physical damage or tampering, such as parking lots, correctional facilities, or outdoor areas.

   • Use: Best for high-risk locations where security cameras are at risk of being damaged or destroyed.

A bullet CCTV camera is a type of surveillance camera that is shaped like a cylindrical tube, resembling a bullet (hence the name). These cameras are typically mounted on walls or ceilings and are designed to be highly visible, serving as a deterrent to potential intruders. Bullet cameras are commonly used for outdoor surveillance but can be used indoors as well. Their distinct, compact design makes them easier to install in specific areas and gives them the ability to focus on specific points or areas.

Types of Bullet CCTV Cameras

1. Fixed Bullet Cameras:

   • Description: These cameras come with a fixed lens and are designed to provide a constant view of a particular area. The angle of the camera is pre-set and cannot be changed once installed.

   • Use: Ideal for monitoring small to medium areas, such as entrances or driveways, where no movement or zooming is needed.
     
     

2. PTZ Bullet Cameras (Pan-Tilt-Zoom):

   • Description: PTZ bullet cameras allow remote control over the camera’s pan, tilt, and zoom functions. This gives operators the ability to adjust the camera’s focus on the fly.

   • Use: Best for larger areas where surveillance of dynamic environments is required. These cameras are often used in places like parking lots or open fields where a broader field of view is needed.
     
     

3. Infrared (IR) Bullet Cameras:

   • Description: These cameras are equipped with infrared (IR) LEDs, allowing them to capture clear footage even in complete darkness or low-light environments.

   • Use: Perfect for outdoor surveillance during the night, such as for monitoring entrances, streets, or other dark areas where visibility is limited.
     
     

4. Wireless Bullet Cameras:

   • Description: These cameras send video footage wirelessly to the central monitoring system, eliminating the need for cables. They often rely on Wi-Fi or other wireless technologies to transmit data.

   • Use: Ideal for locations where running wires is impractical or where a flexible installation is desired. Common in residential setups or smaller commercial environments.
     
     

5. HD or IP Bullet Cameras:

   • Description: These cameras offer higher resolution images, often in HD (720p, 1080p, or 4K), and transmit video over an IP network (using Ethernet or Wi-Fi). They can be integrated with modern security systems and often provide superior video quality.

   • Use: Excellent for locations where high-definition image quality is critical, such as in business settings or areas with high foot traffic that require detailed surveillance.
     
     

6. Vandal-Proof Bullet Cameras:

   • Description: These cameras are built with tough, impact-resistant casings to withstand tampering or vandalism. They are designed to be durable and are usually installed in areas where the cameras might be exposed to physical damage.

   • Use: Common in high-risk areas, such as parking lots, warehouses, and correctional facilities, where there is a likelihood of intentional damage.
     
     

7. Color Bullet Cameras:

   • Description: These cameras offer color video footage during daylight or well-lit conditions, and some may switch to black-and-white video when lighting is poor.

   • Use: Ideal for areas where you want to capture color footage for better identification, such as in retail stores or around entry points.

A power supply in a CCTV system is the component that provides electrical power to all the cameras and other related devices, such as DVRs (Digital Video Recorders), NVRs (Network Video Recorders), and other system components. It ensures that the cameras function properly by supplying the necessary voltage and current.

In most CCTV systems, especially analog and IP cameras, a reliable power supply is crucial for uninterrupted operation, as it powers the cameras to record video footage, transmit signals, and perform other essential tasks.

Types:

• SMPS

• Plug Driver

• PoE

• PoC