A successful CCTV installation is not measured by camera count. It is measured by whether the system produces useful evidence at the right place and time. Good results begin with a site survey and risk assessment, followed by lens, angle, lighting, storage, and network choices tied to a clear objective.
Define the Objective Before the Camera
Separate general observation, motion detection, recognition, and identification at critical points such as entrances or cash areas. Each objective requires different pixel density and framing. A wide image does not necessarily contain usable detail.
What a CCTV Site Survey Should Cover
- Entrances, exits, corridors, and high-risk locations.
- Mounting heights, fields of view, and changing obstructions.
- Day and night lighting, glare, and strong backlight.
- Cable routes, network points, power, and grounding.
- NVR or server location, ventilation, and physical protection.
- Recording retention and permissions for viewing and export.
Camera and Lens Selection
A fixed camera suits a defined view, while a changing open area may sometimes justify PTZ with an operating plan. Wide lenses cover more area with less detail; narrower lenses improve identification at distance. Evaluate infrared range, WDR, weather protection, and impact resistance for the installation environment.
Calculate Storage Before Buying
Storage depends on camera count, resolution, frame rate, compression, recording hours, retention period, and scene activity. Request a written calculation with room for growth and define continuous or motion-based recording. Backing up important incidents is separate from everyday recording capacity.
Network, Power, and Cybersecurity
For IP systems, segment the camera network where practical, use unique passwords, update firmware, and disable unnecessary services. Calculate the PoE power budget, protect core equipment with a UPS, and do not expose remote access directly to the internet without a secure method.
Privacy Is Part of the Design
Aim cameras only at necessary areas and avoid spaces where people reasonably expect privacy. Set access, retention, and export policies. Review applicable legal and regulatory requirements before using audio or sensitive analytics.
Acceptance Tests Before Handover
- Review each camera by day, at night, and against glare.
- Export real footage and verify timestamps and playback quality.
- Test power and network failure, alerts, and storage limits.
- Document camera names, addresses, cable routes, and access roles.
- Receive a maintenance plan for cleaning, drives, and batteries.
Our surveillance and CCTV installation service starts with a survey and finishes with documented testing and user training.
Frequently Asked Questions
How many cameras does a site need?
Floor area alone cannot answer this. Objectives, entrances, viewing angles, obstacles, and required detail determine the count.
Is higher resolution always better?
No. Resolution matters, but lens choice, lighting, position, frame rate, and compression may matter more to usable evidence.
How long should footage be retained?
Business need, policy, and applicable requirements define the period, then storage is calculated using actual recording settings.
For a professional site survey and coverage plan, contact AISMISR.
