CVI — in full, HDCVI (High Definition Composite Video Interface) — is Dahua’s technology for sending HD and 4K video over standard coaxial cable. It carries video, audio and camera control down the one coax run, and PoC (Power over Coax) models power the camera through the same cable, so a single existing cable can do everything. For anyone with an older analogue system, that is the point of CVI: the picture upgrades to HD or 4K without rewiring the building.
Current HDCVI generations include Starlight low-light sensors, full-colour models and Smart Dual Light cameras that switch between infrared and white light. On the recording side, today’s Penta-brid XVRs accept CVI alongside older analogue, AHD, TVI and IP — so a CVI system can grow into a mixed or fully IP one later.
Browse every coax model on the Dahua analog cameras page (organised by resolution), recorders on the DVR and XVR pages, and CVI PTZ models on the PTZ page. A few of the current-generation CVI cameras we stock:
Zenith Security Co. is a UK security equipment supplier, operating since 2012. Orders placed before 2:30pm are normally dispatched for delivery within 1–2 working days to England, Scotland and Wales, with free delivery on orders over £499 — or collect from our Wolverhampton trade counter at Unit 3, Park View Centre, 243 Dudley Road, WV2 3JU (Mon–Fri 9:00am–4:30pm, Sat 10:00am–4:00pm · 01902 902251). We are a supplier rather than an installer: we’ll help you choose before you buy and can recommend a qualified trade installer where needed. Trade installers can apply for a trade account for trade pricing.
