CCTV Cameras: Complete Guide to Professional Surveillance for Business & Home
Posted by Gregory DeRouanna on Jan 12, 2021
What Are CCTV Cameras?
CCTV stands for closed-circuit television. In a traditional CCTV system, security cameras transmit video through a private wired surveillance system to a recorder rather than broadcasting footage publicly.
Today, the term CCTV is commonly used more broadly for professional video surveillance, but there is still an important technical distinction between HD-over-coax CCTV cameras and modern IP network cameras.
At CCTV Security Pros, CCTV cameras primarily refers to wired cameras that connect to a compatible DVR through coaxial cabling and BNC connections. Modern versions can provide HD or 4K video, night vision, audio on supported models, local DVR recording and supported remote viewing.
Are CCTV Cameras Still Used?
Yes. Modern CCTV cameras remain a practical professional surveillance option, particularly for properties that already have compatible coaxial camera cable installed. Instead of discarding usable wiring, a property may be able to upgrade older analog cameras and recorders to newer HD or 4K-capable CCTV equipment after compatibility is confirmed.
The Evolution of CCTV Camera Technology
Older CCTV systems were associated with low-resolution analog video recorded to tapes or early digital recorders. Those systems served an important purpose, but image quality, storage capacity and remote access were limited compared with modern surveillance equipment.
Today's professional CCTV equipment can use the same basic coax-based architecture while providing substantially improved video quality and recorder capabilities. A compatible HD-over-coax camera sends its video to a modern CCTV DVR recorder , which stores video on internal surveillance hard drives.
This creates an upgrade path for many existing installations: keep compatible cable runs where appropriate while replacing outdated cameras and the recorder with modern equipment.
Why Choose Wired CCTV Security Cameras?
A modern wired CCTV system can be an excellent fit when reliability, local recording and existing coax infrastructure are important.
How Does a CCTV Camera System Work?
A professional CCTV system is built around several components working together.
Analog CCTV vs. Modern HD-Over-Coax Cameras
Traditional analog CCTV cameras were built around relatively low-resolution video. Modern HD and 4K CCTV cameras can provide a major image-quality improvement while retaining a coax-based wired system design.
This makes HD-over-coax particularly attractive when a building already contains suitable camera cable. However, the cable, connectors, camera video format and DVR compatibility should always be verified before upgrading.
CCTV Cameras vs. IP Security Cameras
Both are professional wired surveillance technologies, but they use different infrastructure.
| Feature | HD-Over-Coax CCTV | IP / PoE |
|---|---|---|
| Camera Connection | Coax / BNC | Ethernet network |
| Recorder | DVR | NVR |
| Typical New Cable | Coax / Siamese | Cat5e / Cat6 |
| Best Upgrade Scenario | Compatible coax already installed | New network-based installation |
| Local Recording | Yes | Yes |
| Remote Viewing | Supported systems | Supported systems |
For most completely new professional installations, a PoE IP security camera system is often the more flexible platform.
For a property with good existing coax infrastructure, modern CCTV can be the practical upgrade because usable cable runs may remain in place.
CCTV DVR Recorders
The DVR is the recording center of a modern HD-over-coax CCTV system. Compatible cameras connect to the recorder's BNC video inputs, while surveillance footage is stored on internal hard drives.
A professional CCTV DVR can provide tools for live viewing, playback, video search, evidence export and supported remote access.
Choose the recorder channel capacity based on how many cameras you use today and how many you may want to add later.
HD and 4K CCTV Cameras
Modern coax surveillance is no longer limited to the grainy video associated with early CCTV. Compatible HD-over-coax technology can provide high-definition and 4K camera options.
Higher resolution can provide more recorded image detail, but resolution should be considered alongside camera placement, lens choice, lighting and viewing distance.
A properly placed lower-resolution camera can sometimes provide more useful evidence than a higher-resolution camera installed too far away or pointed at an excessively wide scene.
CCTV Cameras with Night Vision
Nighttime performance is an important part of professional surveillance. Many modern CCTV cameras use built-in infrared illumination to provide visibility after dark, while selected models can provide enhanced low-light or supported color-night functionality.
Actual night performance depends on the camera, mounting location, ambient lighting, subject distance and reflective objects within the scene.
Bullet CCTV Cameras
Bullet cameras are one of the most recognizable CCTV camera styles. Their directional housing makes it easy to see where the camera is aimed, which can also provide a visible surveillance presence.
They are commonly used at building exteriors, entrances, parking areas, driveways, loading areas and other locations where a defined direction of view is needed.
Dome CCTV Cameras
Dome-style CCTV cameras provide a compact design that works well for entrances, office areas, retail spaces, hallways and many protected outdoor applications.
Depending on the camera, dome-style housings can also provide additional protection in areas where the camera may be exposed to physical contact.
PTZ CCTV Cameras
PTZ cameras provide motorized pan, tilt and zoom capabilities for applications where an operator or supported automation needs to reposition the camera view.
They can be useful for large yards, parking areas and commercial properties, but fixed cameras should still cover critical evidence locations continuously because a PTZ camera records only the direction it is facing at any given moment.
CCTV Cameras for Business
Commercial properties often need cameras covering several different types of locations. A single business might need exterior cameras, entrance cameras, warehouse cameras and interior cameras connected to one recorder.
CCTV Cameras for Home
CCTV systems can also provide professional wired surveillance for homes, particularly when the property already contains coax camera cabling.
Typical residential locations include entrances, garages, driveways, backyards and side access points. Local DVR recording allows multiple cameras to be reviewed from a centralized system.
24/7 CCTV Camera Recording
A compatible CCTV DVR can be configured for continuous, scheduled or supported motion-based recording. Continuous recording is especially useful when a business wants an uninterrupted record of activity.
Video retention depends on camera count, resolution, frame rate, compression, recording schedule and installed hard-drive capacity.
Remote Viewing for CCTV Cameras
Although the camera video is recorded locally, compatible DVR systems can provide remote access to supported live and recorded surveillance footage through phones and computers.
Internet connectivity is generally required for off-site viewing, but a properly configured DVR can continue recording locally during a temporary internet outage.
CCTV Cameras Without Required Monthly Cloud-Storage Fees
CCTV Security Pros systems are designed around local DVR recording. Your primary surveillance footage can be stored on hard drives inside the recorder without requiring a monthly cloud-storage subscription for standard local recording.
Should You Upgrade an Older CCTV System?
An older CCTV installation may be a strong candidate for an upgrade when the existing cable is still in good condition but the camera resolution, recorder or remote-viewing capabilities are outdated.
Before purchasing replacement equipment, confirm:
- Camera video format
- DVR compatibility
- Existing coax cable condition
- BNC connector condition
- Camera power requirements
- Required recording resolution
- Available recorder channels and storage capacity
Choosing a Complete CCTV Camera System
A complete CCTV camera system pairs compatible cameras with a DVR, recording storage and the required cabling or accessories.
Choose camera count based on the number of views that need surveillance—not simply the square footage of the property.
Why Buy CCTV Cameras from CCTV Security Pros?
CCTV Security Pros has supplied professional surveillance equipment since 2008. Our team can help customers determine whether an existing coax installation can be upgraded, select compatible cameras and DVRs, and configure a system around the property being protected.
CCTV Camera FAQs
What does CCTV mean?
CCTV stands for closed-circuit television and traditionally refers to video transmitted through a private surveillance system rather than broadcast publicly.
Are CCTV cameras still worth buying?
Yes. Modern HD-over-coax CCTV cameras are particularly useful when compatible coax wiring is already installed and a property wants to upgrade image quality and recording equipment.
Can CCTV cameras record in 4K?
Compatible modern CCTV camera and DVR combinations can support 4K video. Always verify the camera resolution and video format against the DVR before purchasing.
What is the difference between a DVR and NVR?
A DVR is generally used with compatible coax-based CCTV cameras, while an NVR is generally used with compatible IP or PoE network cameras.
Can I reuse old CCTV wiring?
Often, but not automatically. Existing coax, connectors and power wiring should be inspected and compatibility with the new cameras and DVR should be confirmed first.
Can CCTV cameras be viewed remotely?
Compatible DVR systems can provide authorized access to supported live and recorded video from phones and computers when properly connected and configured.
Do CCTV cameras require internet?
Internet service is not normally required for basic local DVR recording. Internet connectivity is generally needed for remote viewing away from the property.
Do CCTV systems require monthly fees?
Local DVR recording does not require a monthly cloud-storage subscription for standard recording. Internet service or optional third-party services can involve separate costs.
Are IP cameras better than CCTV cameras?
For many completely new installations, IP and PoE systems provide a flexible modern platform. HD-over-coax CCTV remains a strong choice when compatible coax infrastructure is already installed and worth retaining.
Can CCTV cameras record 24/7?
Compatible DVR systems can be configured for continuous recording as well as supported scheduled or motion-based recording modes.
Upgrade or Build a Professional CCTV Camera System
Whether you are replacing older analog cameras, reusing compatible coax wiring or building a new HD-over-coax surveillance system, CCTV Security Pros can help you choose compatible cameras, DVR capacity and recording storage.
Shop CCTV Cameras Shop CCTV Systems Call 888-653-2288