IP camera or analog camera? The differences and which to choose

What is the basic difference between the two systems?

An analog camera sends the picture to the recorder over coaxial cable (similar to the round cable used for an antenna). The recorder here is a DVR, and it is what converts the picture to digital. Old analog cameras had low resolution. Analog cameras sold today work with HD technologies called AHD, TVI, or CVI and can give Full HD and higher images.

An IP camera converts the picture to digital inside itself and sends it over the computer network, that is, through a network cable. The recorder is called an NVR . Like a computer on the network, each IP camera has its own address. This is why its settings can be accessed remotely, its software can be updated, and the camera itself can do things like motion detection.

What changes in cabling and installation?

In an analog system, two things go to each camera: a coaxial cable for the picture and a separate power line for electricity. In most installations the two are run together as a combined cable in a single sheath, and the cameras are powered from a central adapter.

In an IP system, a single Cat6 cable is enough. PoE capable switch or NVR is used, the same cable carries both the picture and the power. A single run of copper network cable can be at most 100 meters. If a camera is going to a farther point, a switch or a fiber line goes in between.

HD analog cameras can generally carry the picture a longer distance over a coaxial line. How far it can go depends on the quality of the cable and the technology used; this should be checked against the manufacturer's values before installation.

Image quality and smart features

At the same resolution, a well-adjusted HD analog camera and an IP camera can give similar pictures during the day. The difference shows up more at high resolution and in features. Most very high-resolution models and advanced analytics features are made on the IP side.

Features such as motion detection that tells people and vehicles apart, virtual line crossing, and area intrusion alerts are common on IP cameras. They reduce needless notifications. For example, a tree branch swaying in the wind in the garden does not send an alert to your phone every minute; you get a notification only when a person or vehicle enters.

• If you want to read faces or license plates: IP camera.
• If you want to manage the camera remotely and update software: IP camera.
• If the existing coaxial cable is sound and the budget is limited: HD analog.
• A small shop with four or five cameras and fixed needs: either works.

What should those with an old system do?

If the building has coaxial cables laid years ago, their condition is checked first. If the cable is not crushed, the splices are not oxidized, and the outdoor sheath has not cracked in the sun, new HD analog cameras can work over the same cable. In Şanlıurfa, the outer sheath of cables exposed to the summer sun hardens and cracks over time. These cables come back as interference and dropouts in the picture.

A middle path is the hybrid recorder. These devices, called XVR or hybrid DVR, record both analog and a certain number of IP cameras together. This way the existing cameras keep working while newly added points can be installed as IP. How many IP channels a hybrid device supports varies by model, so check this before buying.

Expert note: If you have decided to replace the cable, run Cat6 directly instead of coaxial. The digging and conduit labor is done once, and you will not need to open the walls again to move the camera to IP in the coming years.

What should you watch on the network security side?

Because an IP camera is a device connected to the network, it should be protected like a computer. Cameras left with the factory password and whose software is not updated for years can stay open to access from outside. An analog camera, on the other hand, does not go onto the network on its own. The only part that connects to the network and is accessed remotely is the DVR, so the same rules apply to it.

The practical steps are simple: change the default password on every device, create a separate user for people who monitor that gives viewing permission only, and keep the software of the recorder and cameras up to date with the versions the manufacturer publishes. Keeping the cameras in a network segment separate from the office's or home's general network also prevents guests and other devices from reaching the cameras.

Camera recordings are considered personal data under Law No. 6698 ( KVKK ). Whichever technology you choose, you need to decide from the start who can access the recordings. We recommend consulting an expert about your legal obligations.

What does the cost depend on?

Deciding by looking at the price per camera is misleading. The total cost is determined by the number of cameras, cable length, wall and ceiling labor, the recorder, disk capacity and, if needed, a switch. In a new building, the cable labor will be done anyway, so the difference between IP and analog gets smaller. In a building where the cable is already in place, an analog system saves labor.

The possibility of adding cameras later also counts. When the channel count of an analog DVR is full, a new device is needed. In an IP system, if the network infrastructure is sufficient, adding cameras is more flexible, and if the NVR capacity is full, a second recorder can be connected to the same network.

Questions to ask when deciding

Start the choice from the need, not from the technology. Write down what you want to see at which point: recognizing who comes through the door, reading the license plate of a car in the parking lot, or only seeing whether there is any movement? These answers determine the camera type, its lens, and its resolution.

Then look at the building. Is there cable, what is its condition, how far are the cameras from the recorder? Does the system need to work during a power outage? In an IP system, powering the PoE switch with a single UPS keeps all the cameras running; in an analog system, the camera adapters also need to be backed up.

When we do an on-site inspection as Desa Bilişim, we first measure the existing cable, then write the two options side by side in the same site survey note. This way you see which option suits you in a quote with figures.

Think about the maintenance side too. In an IP system, it is possible to see a faulty camera over the network and restart it remotely. In an analog system, the fault is often in the cable, connector, or adapter and requires on-site measurement.

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