CCTV Systems

AHD, IP and Smart CCTV Systems

We specialise in a range of technologies that include AHD, IP and Smart CCTV systems designed to meet the specific requirements of both residential and business customers. As a forward-thinking company, we stay ahead in the CCTV industry embracing technological advancements and providing creative solutions to address the increasing demands for security and surveillance.

Leading Brands and Comprehensive Solutions

We proudly partner with industry-leading brands such as Hikvision, Dahua, Provision, UniView, EZVIZ, and Ring. These reputable names ensure that the systems we supply and install are built on quality and reliability. Our comprehensive range of solutions caters to a diverse clientele, spanning from homes to businesses of all sizes.


From Analogue to AHD: A Journey of Advancement

The journey from the era of Analogue cameras to the realm of Analogue High Definition (AHD) has been transformative. Analogue cameras have gracefully stepped aside to make room for the enhanced capabilities of AHD systems. The upgrade process from Analogue to AHD is remarkably straightforward owing to the shared use of coaxial cabling. A seamless swap-out of equipment is all that’s needed to transition to the superior quality and clarity that AHD cameras provide.


The Power of IP: Digital Excellence

In the realm of CCTV, Internet Protocol (IP) cameras stand out as a testament to digital innovation. These cameras are a world apart from AHD systems, boasting their own configurable IP addresses. This unique feature allows direct internet connectivity without the need for a Network Video Recorder (NVR). Access to IP cameras are secured through personalised usernames and passwords. The resolution offered by IP cameras far surpasses that of AHD enabling impressive digital zoom capabilities that ensure no detail goes unnoticed.

CCTV Systems by Stemar Security Systems

Embracing the Future with Smart Cameras

Smart cameras have captured the imagination of the market, particularly in the residential sector. Stemar Security Systems are at the forefront of this trend offering cutting-edge smart camera solutions. These intelligent cameras come equipped with their own mobile apps that keep you in the loop with instant push notifications upon motion detecting. What’s more, two-way communication allows you to engage with the surroundings remotely. These cameras are not just observers; the various models offer active defence that include voice recordings, built-in sirens, strobe and spot lights triggered by motion and seamlessly recorded to Cloud, SD cards or NVR’s.

Partnering with Progress

As the CCTV landscape evolves, Stemar Security Systems evolves with it. We’re not just witnessing the industry’s technological advancements – we’re actively shaping them. With our dedication to staying at the forefront of innovation, you can trust us to deliver the latest in surveillance technology for your peace of mind and security.

Explore our range of AHD, IP and Smart CCTV systems and embark on a journey towards enhanced security and surveillance. Contact us today to discover how we can tailor a solution to meet your unique needs.

The Difference Between AHD and IP CCTV Systems

AHD (Analogue High Definition) and IP (Internet Protocol) are two different technologies used in CCTV (Closed Circuit Television) cameras. Each has its own set of advantages and disadvantages and the choice between them depends on various factors including the specific requirements of the installation. Here’s a comparison of the two:

AHD (Analogue High Definition) CCTV Cameras


  1. Cost-Effective: AHD cameras are often more budget-friendly, making them a popular choice for smaller installations or those with budget constraints.
  2. Compatibility: AHD cameras can often be used with existing analogue systems, allowing for upgrades without a complete overhaul.
  3. Simplicity: Installation and setup of AHD systems can be simpler compared to IP systems, especially for those familiar with traditional analog CCTV systems.


  1. Resolution Limitations: While AHD provides higher resolution than traditional analogue cameras, it typically doesn’t match the resolution capabilities of IP cameras.
  2. Limited Features: AHD systems may have fewer advanced features compared to IP systems, such as analytics and advanced motion detection.

IP (Internet Protocol) CCTV Cameras


  1. High Resolution: IP cameras generally offer higher resolution and image quality, providing more detail and clarity in video footage.
  2. Advanced Features: IP cameras often come with advanced features such as analytics, facial recognition and remote access. They may also support integration with other security systems.
  3. Scalability: IP systems are highly scalable, allowing for the addition of more cameras and features as needed.
  4. Network Integration: IP cameras can be easily integrated into existing network infrastructures enabling remote monitoring and management without the need of an NVR.


  1. Cost: IP cameras and associated equipment are typically more expensive than their AHD counterparts.
  2. Complexity: Installation and setup can be more complex, requiring networking expertise. This complexity can also make troubleshooting more challenging.

In summary, the choice between AHD and IP CCTV cameras depends on factors such as budget, required features, scalability and existing infrastructure. Both technologies have their merits and the best choice varies based on the specific needs of the installation.

Remote Viewing of CCTV Systems

Remote viewing for CCTV systems is to the ability to access and monitor the live or recorded video feed from surveillance cameras at a location from a remote location. This feature has become increasingly popular and is facilitated by advancements in technology, networking and the integration of CCTV systems with the internet. Here’s an overview of how remote viewing works for CCTV systems:

  1. Internet Connectivity: To enable remote viewing, the CCTV system must be connected to the internet. This can be achieved through various means, such as a broadband or cellular connection.
  1. Network Configuration: The CCTV system is configured to allow remote access. This involves setting up network protocols, security measures, and permissions to ensure that authorized users can access the system remotely.
  1. Mobile Apps or Web Interface: Users can access the live or recorded video feeds remotely using dedicated mobile applications or web interfaces provided by the CCTV system’s manufacturer. These applications are typically available for smartphones, tablets, and computers.
  1. User Authentication: Remote viewing systems are secured with user authentication mechanisms such as usernames and passwords. Some advanced systems may also use two-factor authentication for enhanced security.
  1. Dynamic Domain Name System (DDNS): To facilitate remote access when the internet connection has a dynamic IP address, DDNS services are often employed. DDNS allows users to access the CCTV system using a domain name instead of a numeric IP address.
  1. Port Forwarding: In cases where the CCTV system is behind a router or firewall, port forwarding may be required. This process involves directing network traffic from a specific port on the router to the CCTV system allowing external access.
  1. Security Measures: Security is a crucial consideration when implementing remote viewing. Encryption protocols, secure connections (HTTPS) and regular software updates help protect the CCTV system from unauthorised access.

Benefits of Remote Viewing:

  1. Real-Time Monitoring: Users can monitor their premises in real-time, enabling a quick response to any security incidents.
  1. Flexibility: Remote viewing provides flexibility, allowing users to check the CCTV footage from anywhere with an internet connection.
  1. Convenience: It offers convenience for business owners, homeowners, and security personnel who can remotely check on their properties without being physically present.
  1. Evidence Retrieval: In the event of an incident, recorded footage can be accessed remotely and used as evidence if needed.

CCTV Cameras used for Intrusion Detection

Tripwire CCTV cameras, also known as tripwire intrusion detection systems, are a type of security technology designed to detect and alert against unauthorised movement in a specific area.

Virtual tripwires in CCTV cameras work through the use of intelligent software and algorithms. Instead of physical wires, these systems create virtual boundaries or lines within the monitored area. When an object or person crosses these virtual lines, the system detects the intrusion and triggers a response, such as sounding an alarm, sending alerts or activating other security measures. Here’s a more detailed explanation of how virtual tripwires work:

  1. Camera Placement:

   – The CCTV cameras are strategically placed to cover the area of interest. These cameras can be fixed or pan-tilt-zoom (PTZ) cameras that can be adjusted to monitor different sections of the space.

  1. Configuration:

   – Users or security personnel configure the virtual tripwires by defining specific lines or zones within the camera’s field of view. This is typically done through the camera’s software interface or a centralised management system.

  1. Intelligent Video Analytics:

   – The cameras are equipped with intelligent video analytics software that continuously analyses the video feed in real-time.

   – The software can distinguish between normal environmental changes (such as moving leaves or shadows) and actual intrusions.

  1. Virtual Line Crossing Detection:

   – The virtual tripwires are essentially lines or zones drawn on the video feed. These can be horizontal, vertical or even complex patterns depending on the system’s capabilities.

   – When an object or person crosses one of these virtual lines which includes a directional option, the software detects the movement.

  1. Triggering an Event:

   – Once a virtual tripwire is crossed, the system triggers an event. This event can vary based on the configuration and user preferences.

   – Common responses include sending real-time alerts to security personnel, sounding alarms, recording video footage or activating other security measures.

  1. Adjustable Sensitivity:

   – Virtual tripwire systems often come with adjustable sensitivity settings. Users can fine-tune the system to ignore certain types of movements or set it to be more or less sensitive depending on the environment.

  1. Filtering False Alarms:

   – Advanced virtual tripwire systems use filtering mechanisms to reduce false alarms. This may involve additional analysis of the detected object’s size, speed and direction to determine whether it poses a real threat.

  1. Integration with Other Systems:

   – Virtual tripwire systems can be integrated with other security systems, such as access control systems, to provide a more comprehensive security solution.

  1. Real-time Monitoring and Alerts:

   – Users can monitor the system in real-time, either locally or remotely. In the case of an intrusion, the system can send immediate alerts allowing for a quick response to potential security threats.

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