CCTV is still the most common and cost-effective way to secure a home or workplace physically. This tutorial covers the core steps of installing a CCTV system, from choosing equipment to final setup.
Step 1: Choosing camera type — Analog/AHD vs. IP
Analog/AHD cameras connect to a DVR via coaxial cable, are simpler and cheaper to install, and are sufficient for most homes and shops. IP cameras connect to an NVR via network cable (usually powered over the same cable via PoE), offer higher image quality, and suit larger or more professional projects.
Step 2: Choosing the right DVR or NVR
The DVR/NVR's channel count should be at least equal to your current camera count, and ideally a bit more for future expansion. Calculate hard drive capacity based on camera count, recording quality, and how long you need to retain footage (typically 15–30 days).
Step 3: Planning camera placement
Before any cabling, review the building layout and identify main entry points (doors, parking), blind spots, and each camera's field of view. Typical mounting height is 2.5–3 meters — high enough to make tampering difficult, while still keeping faces identifiable.
Step 4: Cabling
For analog/AHD cameras, coaxial cable is used (typically RG59, with a separate power cable or a combined cable). For IP cameras, Cat5e or Cat6 network cable with a PoE switch or PoE injector is enough — a single cable carries both data and power.
Step 5: Connecting to the DVR/NVR and initial setup
After physically connecting all cameras, enter the DVR/NVR menu, set the date and time, configure each channel's recording quality and frame rate, and format the hard drive (on first setup).
Step 6: Remote access
Most modern DVR/NVRs allow live viewing from anywhere via a mobile app or port forwarding on the router. For security, always change the device's default password — these devices are a common attack target when left on factory settings.
Summary
Proper CCTV installation combines networking knowledge (for IP cameras), cabling skills, and an understanding of physical security principles — exactly what's covered, alongside networking and cybersecurity, in my in-person hardware courses.
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