Editorial note: Original educational article prepared for Rihuum readers. Check vendor documentation and local regulations before making material technical or financial decisions.
Define what the system must help you see
A CCTV project should begin with security objectives. The system may need to identify people at an entrance, observe activity in a car park, monitor a cash point or reconstruct an incident. Each objective requires a different field of view, camera position and image detail.
Write a camera schedule that links every location to a purpose. “Cover the compound” is too vague. “Identify a person entering the pedestrian gate during day and night” can be tested and accepted.
Conduct a day-and-night site survey
Walk the site with the people responsible for security and operations. Mark entrances, assets, blind spots, lighting changes, public areas and places where privacy is expected. Check mounting surfaces, cable routes, network points and access for maintenance.
Return or review the site under night conditions. Bright lights, vehicle headlights, reflections and complete darkness can change image quality. A camera that appears suitable during the day may fail when an incident is most likely.
Match camera type and lens to the scene
Fixed cameras suit stable views. Varifocal lenses help adjust framing. Pan-tilt-zoom cameras can follow activity but should not replace fixed coverage of critical points, because they may be looking elsewhere during an event.
Wide views show context but provide fewer pixels on a person or vehicle. Identification points need tighter framing. Choose resolution together with lens, distance, lighting and recording settings rather than relying on megapixel labels alone.
Plan recording and retention
Storage depends on camera count, resolution, frame rate, compression, motion, recording schedule and retention period. Calculate expected usage and include a safety margin. Decide whether recording is continuous, motion-based or event-driven according to the risk.
Important footage should be exportable in a usable format with accurate date and time. Restrict deletion and maintain a procedure for preserving evidence after an incident. Retention should follow legal and organisational requirements rather than an arbitrary maximum.
Design the network securely
IP cameras are network devices and should not be exposed directly to the internet. Place surveillance equipment on a separated network where possible, change default credentials and disable unused services. Use strong named administrator accounts.
Estimate bandwidth between cameras, recorders and viewing stations. Remote viewing should use an approved secure method. Update firmware through a controlled process and keep an inventory of device models, addresses and installation locations.
Provide dependable power
Cameras, switches, recorders and displays require stable power. Use appropriate surge protection and an uninterruptible power supply sized for the required runtime. In locations with prolonged outages, integrate a generator, inverter or other backup source.
Test what happens during power loss and restoration. A system that reboots unpredictably or loses network switches may leave gaps. Document shutdown and recovery behaviour.
Respect privacy and access control
Do not position cameras in private spaces. Use signage where required and define who may view live video, search recordings and export evidence. Access should be logged and reviewed.
Remote viewing on personal phones can create uncontrolled copies and shared passwords. Provide authorised accounts and remove access promptly when roles change. Surveillance should be proportionate to the security purpose.
Commission and maintain the system
Acceptance testing should verify every objective during relevant lighting conditions. Check identification views, timestamps, recording continuity, search, export, alerts and backup power. Give the client a camera schedule, network diagram, credentials handover and maintenance plan.
Clean lenses, check storage health, confirm recording and inspect camera alignment on a schedule. Construction, vegetation and everyday movement can gradually block a view. Maintenance protects the original investment.
- Review every camera live and from recorded playback.
- Test night images and vehicle headlights.
- Export a sample clip and play it on another device.
- Test UPS runtime and restoration.
- Confirm user permissions and password ownership.
Frequently asked questions
How many cameras does a property need?
The number follows the defined risks and required views. A site survey is more reliable than a camera-per-square-metre rule.
Is a higher megapixel camera always better?
No. Lens, lighting, distance, compression and placement determine whether useful detail is captured.
Can CCTV prevent every incident?
No. It supports deterrence, awareness and evidence, but should be combined with lighting, access control, procedures and response.
Official references and further reading
Use these primary or official resources to confirm time-sensitive technical details.