CCTV Security Cameras

CCTV Security Cameras

HD CCTV over Coax — CVI / TVI / AHD (2MP • 4MP • 5MP • 8MP/4K)

Upgrade your CCTV to modern HD CCTV without re-wiring. A2Z’s multi-format cameras support CVI, TVI, and AHD (many also include CVBS) and deliver 2MP/1080p, 4MP, 5MP, and even 8MP (4K) Ultra HD. Keep existing RG59/RG6 Siamese runs, pair with a Hybrid DVR/XVR, and phase in IP later as needed, on the same platform. HD CCTV Security Cameras can even work via CAT5e/CAT6 cables along with adapters, and are a great option for long cable runs.

Need a turnkey kit? See CCTV Security Camera Systems. Comparing to PoE and analytics? Visit IP Security Cameras. Planning storage/compatibility? The Support Hub has FAQs, calculators, and guides.

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Buyer’s Guide to Modern CCTV (HD-over-Coax) Cameras

Today’s CCTV centers on multi-format HD-over-Coax—CVI, TVI, and AHD—so you can achieve crisp HD video while reusing existing coax. Many cameras are “4-in-1,” combining CVI/TVI/AHD with CVBS for backward compatibility, enabling phased upgrades without downtime. Common resolutions include 2MP (1080p), 4MP, 5MP, and 8MP (4K), with modern encoding that helps maximize storage and remote-viewing performance.

HD-over-Coax vs. IP — When to choose each

Choose HD-over-Coax when reusing RG59/RG6, keeping labor low, or upgrading a working analog site to 2–8MP with minimal disruption.
Choose HD-over-Coax for longer single-run distances over coax and straightforward point-to-point wiring.
Choose IP when you want PoE single-cable installs, scalability, multi-streaming, and advanced analytics/AI. See IP Security Cameras.

Key decisions

Resolution: 2MP/1080p for general coverage; 4MP–5MP for added detail; 8MP/4K for wide scenes and forensic clarity.
Format & compatibility: Multi-format CVI/TVI/AHD simplifies mixed fleets and phased migrations; many models also provide CVBS for legacy spot monitors.
Lens & field of view: Fixed lenses keep installs quick; varifocal (for example, 2.7–13.5 mm) lets you fine-tune identification zones and plate-capture angles.
Low-light & WDR: Integrated IR, smart IR, and true WDR handle parking lots, storefront glass, backlighting, and nighttime scenes.
Housing & mounting: Weather ratings (IP66/IP67) and vandal-resistant housings protect outdoor and public-facing devices; junction boxes and mounts keep cable management clean.
Audio & I/O: Some models add mic support or alarm I/O for event triggers and site deterrence.
Recording & retention: Pair with a Hybrid DVR/XVR using efficient codecs (for example, H.265/H.265+), motion rules, and schedules to maximize days on disk.

Use-case playbook

Home & Residential

Turrets or domes for doors/driveways; bullets for visible deterrence. True WDR helps with backlit porches and garage glare.

Small Business & Office

Turrets and domes inside; bullets outside. Prioritize entrances, corridors, cash/asset areas. Use schedules and smart events to stretch retention.

Retail & Hospitality

Emphasize entrances, POS, and aisles. True WDR near storefront glass; LPC at lot entrances supports incident follow-up.

Campus & Commercial

Mix fixed coverage with PTZs for response; place LPC on choke points (gates/garages). Standardize on multi-format cameras to simplify service.

Industrial & Infrastructure

Rugged housings, surge protection, and thoughtful mounting are key. Bullets for long approaches; domes/turrets in process areas; PTZs for yards and perimeter tours.

Wiring & installation notes

Reuse existing RG59/RG6 where feasible; confirm connector quality and power budget for IR-heavy models.
Need UTP? Run HD-over-Coax over CAT5e/CAT6 with video baluns; label format settings (CVI/TVI/AHD) per camera for easy service swaps.
Add surge protection and weather-rated junction boxes outdoors; protect pigtails and terminations.
Align bitrate, frame rate, and recording schedules with retention goals and remote bandwidth limits.
Hard-to-wire sites can use point-to-point wireless bridges or 4G/5G backhaul; for remote/no-power locations see Solar Security Camera Systems.

Storage & retention planning

Size storage based on cameras, bitrate, frame rate, and recording mode (motion/continuous/schedules). H.265/H.265+ on the recorder can reduce disk usage significantly. For quick sizing and layout help, use calculators and guides in the Support Hub.

Compatibility & legacy terms

Legacy analog specs such as 960H or TVL reflect pre-HD eras. Modern systems use CVI/TVI/AHD and megapixel resolutions (2MP/1080p, 4MP, 5MP, 8MP/4K). If you’re replacing older cameras, an XVR keeps the system usable during transition while you phase in higher-resolution or IP devices.

Resources

Looking for step-by-step help? Visit the Support Hub for FAQs, calculators, and guides on topics like CVI vs TVI vs AHD, storage and retention, and LPC setup.