CCTV cameras explained: what CCTV means, the main types of CCTV camera, the features that matter, India's new security rules and how to choose for a site.
CCTV means closed circuit television: video sent to a private set of screens and recorders, not to the public.
The term covers analogue cameras on a DVR and IP cameras on an NVR. Most new projects are IP.
The housing names the type. The sensor, lens and night picture decide the quality.
Choose resolution by the detail the job needs on the target, not by the number on the box.
In India, CCTV cameras must be tested against MeitY's Essential Requirements and registered with BIS before sale. Ask for proof.
Wired CCTV records without Wi-Fi or internet. Only remote viewing needs a connection.
The biggest weakness of CCTV is footage nobody watches. AI and rules turn cameras into a system that acts.
Search for CCTV camera and most of the first page is shops: price lists, discount banners and lists of the best camera under a price. In India the term is one of the most searched in all of security, far more than in the US or the UK.
Shops answer which box to buy. They rarely answer what decides whether a system works: which type suits each spot, how much detail the job needs, what happens when the internet drops, what the law expects, and who will watch. This guide answers those questions.
A CCTV camera is a video camera that sends its picture over a closed, private link to a limited set of monitors and recorders, rather than broadcasting it to the public. CCTV stands for closed circuit television. CCTV cameras are used for security, safety and monitoring in homes, businesses, cities and public buildings.
A complete CCTV system has four parts: cameras, the cabling or network that carries their video, a recorder that stores it, and the screens or software where people watch and search it.
It is called closed circuit because the signal travels only to a fixed, private set of screens and recorders. Broadcast television is open to anyone with a receiver. Closed circuit television is not.
The idea is almost a century old. Wikipedia's history of closed circuit television records an early system built in 1927 by the Russian physicist Leon Theremin, and a 1942 Siemens system in Germany that watched rocket launches. The name stuck as cameras moved to computer networks, because the video still stays inside a private system that only authorised people can reach.
Security camera is the umbrella term for any camera used to protect people and property. CCTV is the traditional name for cameras wired to a private recording system. An IP camera is a CCTV camera that sends digital video over a computer network.
Security camera. Any camera used for protection, from a doorbell camera to a city junction camera. The term describes purpose, not technology.
CCTV camera. Traditionally an analogue camera on a coaxial cable to a DVR, a digital video recorder. In everyday use, especially in India and the UK, CCTV now means any fixed surveillance camera, analogue or IP.
IP camera. A network camera with its own processor. It compresses its own video and sends it over Ethernet or Wi-Fi to an NVR, a network video recorder, or to video management software. Consumer Wi-Fi cameras are IP cameras too. Our complete guide to IP cameras explains how they work.
There are about ten common types of CCTV camera. Most are named for their shape, a few for what they do. Pick the type for the location, then judge the picture.
Bullet cameras. A long cylinder on a wall bracket, pointing in one obvious direction. Bullets suit perimeters, driveways and long corridors, often with strong infrared and a longer lens. They deter, but are easier to knock off aim.
Dome cameras. The camera sits under a tinted dome, usually on a ceiling. People cannot easily tell where it points, and vandal resistant domes survive a hard knock. Our bullet versus dome guide compares the two in detail.
Turret cameras. Also called eyeball cameras: a ball shaped lens unit sits in a shallow, open housing with no dome cover. That matters at night. A dome cover can bounce the camera's own infrared back into the lens, and it collects dust and raindrops. A turret has nothing in front of the lens, so its night pictures are usually cleaner.
Turrets mount on a ceiling or a wall and aim easily, because the ball swivels in its housing. They suit offices, shops, schools, hotel corridors and sheltered outdoor walls. The trade: the exposed lens is easier to tamper with than a vandal rated dome, and spiders like the open housing. For indoor spots where nobody is likely to attack the camera, a turret is the sensible default.
PTZ cameras. Pan, tilt and zoom: an operator, a preset tour or automatic tracking moves the view. One PTZ can cover a car park that would need several fixed cameras, but it only sees where it points. Our PTZ camera guide goes deeper.
Fisheye and 360 degree cameras. One ceiling camera covers a whole room, and software flattens the circular picture into normal views. They give awareness, not identification at distance. Our fisheye camera guide explains the trade.
Thermal cameras. They see heat, not light, so they detect people and vehicles in total darkness, smoke and light fog, at long range. They do not show faces or plates. Our thermal camera guide goes deeper.
Box cameras. A rectangular body with an interchangeable lens, so installers can fit the exact lens for the job, such as a long zoom at a gate.
ANPR and LPR cameras. Number plate cameras with a narrow view, a fast shutter and infrared tuned to read plates on moving vehicles, day and night. ANPR means automatic number plate recognition; LPR means licence plate recognition. Our licence plate reader guide covers the camera and the software.
Covert cameras. Small cameras hidden in a smoke detector, a clock or behind a pinhole. They have narrow, legitimate uses, such as investigating theft at a till, and strict legal limits in most countries. Take advice first.
Wireless and Wi-Fi cameras. They send video over Wi-Fi or another radio link instead of a cable, but still need power from a socket, a battery or a solar panel. They are quick to fit, but Wi-Fi can drop or be jammed, so wire every camera that matters.
For new projects, choose IP. Choose HD analogue mainly to upgrade an existing coaxial installation cheaply.
Analogue CCTV. The camera sends video down a coaxial cable to a DVR, which converts and records it. HD analogue formats, known as AHD, HD-TVI and HD-CVI, carry high definition video over the same coax. They are simple, but each camera needs its own cable run, and features depend on the DVR.
IP CCTV. Each camera is a small computer on the network, sending compressed video to an NVR or to video management software. One cable can carry video, control and power, using Power over Ethernet. IP brings higher resolutions, analytics on the camera and open standards such as ONVIF.
Hybrid. A hybrid recorder, often sold as an HVR or XVR, accepts both, so a site can move to IP gradually. Our NVR vs DVR comparison covers recorders.
Judge these features before the brand or the megapixel count.
Resolution and pixels per metre. Megapixels describe the whole picture. What matters is how many pixels land on the target at the working distance. A 4MP camera on a doorway can show more facial detail than an 8MP camera covering a car park. Our guide to SD, HD and 4K resolution sets out the pixel densities needed to detect, recognise and identify a person.
Low light and infrared. Most CCTV cameras switch to black and white infrared at night, while low light sensors, often sold as starlight, keep colour in dim light. Our night vision camera guide covers the choices.
Wide dynamic range (WDR). WDR keeps detail when a scene is bright and dark at once, such as a sunlit doorway.
Lens and field of view. A wide lens covers more and shows less detail. A varifocal lens lets the installer adjust the view on site.
Weather and vandal ratings. The IP rating, defined in the international standard IEC 60529, measures protection against dust and water: IP66 withstands powerful water jets, and IP67 temporary immersion. The IK rating measures impact resistance, and IK10 is the toughest common grade. In India, check the operating temperature range too.
Power over Ethernet (PoE). One cable carries video and power, up to about 100 metres per run, and one UPS can keep many cameras running through a power cut. Our PoE guide covers power budgets.
Compression and storage. H.265 needs considerably less bandwidth and storage than H.264 for a similar picture. A memory card slot lets the camera keep recording if the network or recorder fails.
Audio. A microphone and speaker allow listening and two way talk. Recording audio carries stricter legal rules than video, so enable it deliberately.
ONVIF and RTSP. ONVIF is the industry standard that lets cameras and software from different makers work together. RTSP is the common way to pull a live stream. A camera that supports both is not locked to one maker's recorder.
There is no official top ten, and most rankings online are advertising. Brands commonly sold in India include, in alphabetical order, Axis, Bosch, CP Plus, Dahua, Godrej, Hanwha Vision, Hikvision, Honeywell, i-PRO (formerly Panasonic's security camera business), Sparsh and Uniview. Each makes strong and basic models, so four checks matter more than the badge.
Registration and testing. In April 2024, India's Ministry of Electronics and Information Technology (MeitY) amended its Compulsory Registration Order to add Essential Requirements for the security of CCTV cameras, as MediaNama reported at the time. Covered cameras are tested against those requirements under the STQC Directorate's CCTV testing and evaluation scheme, and registered with the Bureau of Indian Standards (BIS) before sale. The requirements cover tamper resistance, access control, encrypted transmission, software updates, strong passwords and penetration testing. Ask for the registration of each model.
Firmware support. Choose a maker that publishes security updates and supports the model for years.
Openness. ONVIF and RTSP support let you change recorder or software later without replacing cameras.
Local service. Spares, warranty handling and trained installers count as much as the specification sheet.
Yes. A wired CCTV system records to its DVR or NVR over its own cables, with no Wi-Fi or internet at all. A connection is needed only to view cameras or receive alerts away from the site.
Does a CCTV camera record if the Wi-Fi is off? Wired cameras keep recording. Wi-Fi cameras with a memory card usually keep recording to the card, though they stop sending video to the recorder. Cameras that record only to the maker's cloud stop until the connection returns.
At many Indian sites, power matters more than Wi-Fi. Put the recorder, the PoE switch and the router on a UPS, and a short power cut will not leave a gap in the footage.
Yes. Video surveillance of your own property and of public areas is broadly legal in the US. Audio is where people go wrong, and the rules vary by state. This is general information, not legal advice.
The Reporters Committee for Freedom of the Press explains that federal law requires only one party's consent to record a conversation, while about 11 states primarily require everyone's consent. That is why many businesses leave audio off. Cameras where people expect privacy, such as bathrooms and changing rooms, are off limits.
Elsewhere the rules differ. In India, footage of identifiable people is personal data under the Digital Personal Data Protection Act, 2023. In the UK and Europe, data protection law applies to most business CCTV. Everywhere, put up clear signs, set a retention period and limit who can see the footage.
The main disadvantage of CCTV is that it records far more than anyone watches, so it often explains an incident afterwards rather than preventing it. It also raises privacy concerns, leaves blind spots, needs maintenance and adds cyber risk.
Footage nobody watches. A person watching a wall of screens loses attention quickly, and most cameras are never viewed live.
Privacy. Poor placement, long retention and loose access turn a safety tool into a liability.
Blind spots. Pillars, stacked goods, parked vehicles and poor lighting create gaps that intruders learn.
Maintenance. Lenses get dirty, infrared attracts insects and spider webs, hard disks fail and cameras get knocked off aim. A camera that has failed silently gives false comfort.
Cyber risk. Default passwords, old firmware and recorders open to the internet invite attackers. Our video surveillance cybersecurity guide covers the fixes.
1. Write down the job of each camera: detect anyone at the fence, recognise people at reception, identify faces at the entrance, read plates at the gate. The job sets everything else.
2. Walk the site by day and at night. Note light, glare, trees and cable routes.
3. Pick the type for each spot: bullets on the perimeter, turrets and domes indoors, a PTZ for a large yard, fisheye for open rooms, ANPR at vehicle gates, thermal where darkness or distance defeats ordinary cameras.
4. Size the resolution and lens from the job and the distance.
5. Judge the night picture and the WDR. Many incidents happen in poor light.
6. Match the environment: IP66 or IP67 outdoors, a vandal rated housing within reach of people, and a temperature range that suits your summer.
7. Plan cable, power and backup: PoE where you can, runs within about 100 metres, and a UPS for the recorder and switches.
8. Plan recording: days to keep, H.265 where supported, and storage for continuous recording on key cameras.
9. Check security and paperwork. In India, ask for BIS registration against MeitY's Essential Requirements. Everywhere, insist on current firmware, unique passwords and cameras on their own network.
10. Insist on openness. Choose cameras that work over ONVIF and RTSP on your own network, not only through the maker's cloud account.
11. Decide who watches, and which software turns recordings into action.
A CCTV system is the set of cameras, cabling, recorders, software and screens that captures, stores and shows video from a site to authorised people. In security, CCTV does four jobs: it deters, detects, verifies alarms and provides evidence.
Cameras capture. Recorders store: a DVR for analogue cameras, an NVR for IP cameras, each with a fixed number of channels. A video management system (VMS) is software that brings many cameras and recorders, across brands and sites, into one place for live view, search, evidence, AI analytics and automated response.
A small shop needs a recorder and a screen. Once a site has dozens of cameras or a control room, the VMS decides whether the cameras are any use.
Visylix does not make or sell cameras. It is an automated AI video surveillance platform, built in India, that works with the CCTV cameras you already own and turns them into a system that watches, decides and acts.
Your cameras and recorders, as they are. Visylix finds ONVIF cameras across the network, connects directly over RTSP, and plays back footage already stored on NVRs from Hikvision, Dahua, Uniview, I8H, Bosch and Panasonic, and on models sold under the CP Plus, Honeywell, Sparsh and Godrej names. Analogue cameras join through the DVR they are already wired to.
It watches. 22 AI analytics built in house, including intrusion detection, line crossing, number plate recognition, face recognition, fire and smoke, PPE and camera tampering.
It decides and acts. Sudarshan rules combine conditions, time sequences and schedules, then raise alarms in the operator console, play a talkdown warning through the camera speaker, fire siren and door strike relays, or send signed webhooks and SIEM events. Operators can also listen and speak through a camera with two way audio.
Radha, the AI copilot, answers plain questions in English, Hindi and Hinglish, with 111 tools: find footage, follow a plate across cameras, or start a PTZ patrol tour by name.
The control room. Live view in any modern browser in under a second over WebRTC, video walls up to 6x6, PTZ autotracking, and an evidence player that opens offline, sealed with SHA-256 so anyone can check the footage is untouched.
On your own servers. Visylix ships as a Docker image on your hardware, on premise or fully air gapped. Video never leaves the building.
Plans. Starter (₹4,999 or $49 per month) and Pro (₹9,999 or $99 per month) include unlimited cameras on the VMS licence. AI analytics are a separate subscription, billed per camera per month, on the cameras you choose. Talk to us for AI pricing.
CCTV cameras earn their place as a visible deterrent at entrances and perimeters; as evidence after theft, damage or an accident; for checking an alarm before anyone is sent; and, with AI and rules on top, as an automated system that detects and responds while people are busy elsewhere.
They disappoint when cameras are chosen by megapixels instead of the job; when nobody checked the night picture; when footage is kept with no clear purpose or retention period; when cheap devices sit on the internet with default passwords; and when a wall of screens is expected to replace attention, so nobody sees an incident until the next morning.
A CCTV camera is a video camera that sends its picture over a private link to recorders and screens, rather than broadcasting it. The main types are bullet, dome, turret, PTZ, fisheye or 360 degree, thermal, box, ANPR, covert and wireless cameras. Most are named for their housing. Pick the type for the location, then judge the sensor, lens and night picture.
CCTV stands for closed circuit television. It is called closed circuit because the video travels only to a fixed, private set of monitors and recorders, unlike broadcast television, which anyone can receive. The name dates from early systems that ran on dedicated cables to a single monitor, and it stuck when cameras moved to digital networks.
Security camera is the umbrella term for any camera used for protection, including doorbell and Wi-Fi home cameras. CCTV traditionally means cameras wired to a private recording system: first analogue cameras on a DVR, now usually IP cameras on an NVR. In everyday speech the terms overlap, and most business security cameras are CCTV cameras.
There is no official ranking. Brands commonly sold in India include, in alphabetical order, Axis, Bosch, CP Plus, Dahua, Godrej, Hanwha Vision, Hikvision, Honeywell, i-PRO, Sparsh and Uniview. Judge the model rather than the badge: BIS registration against MeitY's security requirements, regular firmware updates, ONVIF and RTSP support, a clean night picture and good local service.
For most homes, wired turret or dome cameras at each entrance, with good night vision, recording to a small NVR or a memory card. Turrets usually give cleaner night pictures than domes. Wi-Fi cameras suit a flat or a single room. Keep cameras pointed at your own property, and put the recorder and router on a UPS.
A wired CCTV camera keeps recording to its DVR or NVR without Wi-Fi or internet. A Wi-Fi camera with a memory card usually keeps recording to the card, but stops sending video to the recorder. A camera that records only to the maker's cloud stops recording until the connection returns. Viewing from outside the site always needs a connection.
Generally yes, for video of your own property and of public areas. Audio is stricter: federal law needs only one party's consent to record a conversation, but about 11 states primarily require everyone's consent. Cameras are off limits where people expect privacy, such as bathrooms and changing rooms. Rules vary by state, so take local legal advice.
The biggest disadvantage is that CCTV records far more than anyone watches, so it often explains an incident afterwards instead of stopping it. Other drawbacks are privacy concerns, blind spots, maintenance, storage costs and cyber risk from networked cameras left on default passwords. AI analytics and automated rules address the first problem. Good design and housekeeping address the rest.
Yes. Visylix does not sell cameras. It connects to the cameras you own over ONVIF and RTSP, plays back footage on existing NVRs, including models sold under the Hikvision, Dahua, Uniview, CP Plus, Honeywell, Sparsh and Godrej names, and brings analogue cameras in through your DVR. It adds 22 AI analytics, automated rules and the Radha copilot, all on your own servers.