A cable gland is a mechanical fitting used to securely attach and seal electrical cables when they enter equipment or enclosures. It protects cables from pulling, twisting, dust, moisture, and vibration. Cable glands also help maintain proper grounding and strain relief, improving overall safety.

Cable glands are commonly used in electrical panels, machines, outdoor installations, and industrial machinery. They are developed using different materials such as plastic, brass, or stainless steel for installation in various types of environments. Using the right cable gland ensures perfect cable management and reliable performance of electrical systems, as well as increases the lifespan of expensive cables.

Cable Gland

A card reader is an electronic device used to read data stored on access cards such as RFID, proximity, or smart cards. It is commonly used in access control systems to allow or restrict entry to secured areas. When a valid card is scanned, the reader sends a signal to unlock doors or activate systems.

Card readers are most commonly used in large spaces to restrict entry to limited users like offices, hotels, schools, and industrial facilities. They improve security by allowing only authorized personnel to enter specific areas. Card readers are also designed to help in attendance tracking, monitoring movement, creating visiting records, and managing access efficiently.

Card Reader

A ceiling speaker is an audio device installed in ceilings to play sound evenly across a room. It is commonly used for public address systems, background music, and announcements in offices, malls, airports, and schools. Ceiling speakers save space and provide a clean, professional look.

These speakers deliver clear and balanced sound without taking up much wall or floor space. Ceiling speakers can be connected to the amplifiers and other sound systems for easy control. These speakers are best for large areas where consistent and smooth audio quality is needed, along with neat and tidy installations. 

Ceiling Speaker

A circuit breaker (CB) is an electrical safety device designed to protect wiring, equipment, and people from damage caused by overloads, short circuits, or electrical faults. It automatically interrupts the flow of electricity when it detects unsafe current levels. Unlike fuses, circuit breakers can be reset after tripping, making them reusable and convenient for ongoing protection in electrical systems.

Circuit breakers make electrical systems more secure and reliable. They are most commonly used in homes, offices, and industrial facilities to protect expensive machinery. These circuit breakers not only protect the lower circuits but also distribute loads evenly to the branch circuits, preventing overloads. They are sourced and installed in electrical systems based on their power ratings and total load handling capacity.

Circuit Breaker (CB)

Cloud storage is a digital method of storing data on remote internet-based servers instead of local devices like hard drives or memory cards. It allows users to upload, save, and access files such as videos, images, documents, and backups from anywhere using an internet connection. In security systems, cloud storage is often used to save CCTV footage safely off-site.

Cloud storage saves your data to a digital platform, which you can access remotely from anywhere with the right credentials. In CCTV surveillance systems, cloud storage can also be used to securely store the recorded footage. These platforms are highly secure, holding all your backup in a data loss and theft-preventive space. It also supports business projects, serving as a central database to share and access project files.

Cloud Storage

A Central Monitoring System (CMS) is a centralized platform used to monitor, control, and manage multiple security or operational systems from one location. It collects data from different devices such as CCTV cameras, alarms, access control systems, fire sensors, and intrusion detection equipment. The CMS displays all information on a single dashboard, making it easier for operators to track activities in real time and respond quickly to alerts or incidents.

CMS is widely used in large facilities like office buildings and commercial places like shopping malls with control rooms. It helps improve security, reduce manual effort, and ensure faster decision-making. CMS enhances safety, provides a clear understanding of the situation, and helps manage things efficiently with centralized monitoring and reporting.

CMS (Central Monitoring System)

A CMS Client is a software application used to access and operate a Central Monitoring System (CMS) from a computer or mobile device. It acts as the user interface that allows operators to view live video, receive alerts, manage alarms, and control connected security systems such as CCTV cameras, access control units, and intrusion sensors. The CMS client connects to the central server over a network.

CMS Clients are most commonly used in areas where security teams monitor the entire building or property from a common place, like a security control room. These monitoring systems are highly secure, and only an authorized user can manage the controls from a single site. As these systems are established for security, they are also programmed for recording event logs, playback security footage, and real-time notifications.

CMS Client

A communication module is an electronic component that enables devices to send and receive data with other systems or networks. It acts as a link between equipment such as sensors, controllers, cameras, or alarms and a central monitoring system or server. Communication modules can use different technologies, including Ethernet, Wi-Fi, GSM, 4G/5G, RS485, or Bluetooth, depending on the application.

Communication modules ensure real-time data transfer, remote monitoring, and allow other systems to integrate easily. In alarm and surveillance setups, communication modules help transmit alert messages conveying alerts, status updates, and video data reliably. They are widely used in security, industrial automation, and IoT systems. Choosing the right module is essential to improve connectivity and the performance of the system.

Communication Module

A conduit is a protective tube or channel used to route and safeguard electrical wires and cables. It helps prevent damage from moisture, heat, dust, chemicals, and physical impact. Conduits are commonly installed in walls, ceilings, floors, and underground to keep wiring organized and secure. They are made from materials such as PVC, metal, or flexible plastic, depending on the installation requirements.

Conduits protect the users from electrical shocks by covering the electrical wiring. The live wires cannot come in contact with users or with other live wires, which can cause fire hazards. Conduits are durable coverings that help to upgrade and inspect the electrical systems easily. Most commonly, they are essential for commercial and industrial spaces where heavy transmission lines are used.

Conduit

A contact sensor is a basic but crucial device used in security and intrusion detection systems. It consists of two parts: a magnet and a sensor switch. These parts are installed on doors, windows, or gates. When the door or window is closed, the magnet keeps the sensor circuit complete. When it is opened, the circuit breaks and sends an alert signal.

Contact sensors are very reliable as they depend on the physical contact of doors and windows to complete the circuit. These sensors are mainly used in commercial and industrial facilities, but can also be installed in residential security systems. They play a crucial role in preventing intrusion and alerting about the entry and exit of users, even if they are authorized.

Contact Sensor

A control panel is a central unit used to manage, monitor, and control electrical or electronic systems. It receives signals from connected devices such as sensors, switches, alarms, cameras, or machines and processes the information to take required actions. Control panels are widely used in security systems, industrial automation, fire alarms, and building management systems.

They help organize wiring, improve system reliability, and ensure smooth operation. In security and electrical setups, a control panel plays a critical role in coordination, safety, and efficient system control. Electrical panels contain wiring and connections in a very organized way. They come in various sizes with varying numbers of fuses and circuit breakers based on the total electrical load they are designed to handle.

Control Panel

An access controller is the main decision-making unit in an access control system. It receives data from input devices such as card readers, biometric scanners, keypads, or fire alarms and checks this information against programmed access rules. Based on this verification, the controller decides whether to grant or deny access and then sends commands to door locks, turnstiles, or exit devices.

Access controllers have varying capacities to handle different numbers of entry points. High-capacity devices are used in large spaces where they can handle access to numerous doors. It is a single unit that helps control and improve the security of a large place from a central point. These devices can help verify credentials, customize access for a user, and allow or deny entry in real-time. Moreover, they are designed to be integrated with other security systems, like CCTV, to improve security.

Controller (Access Control)

Coverage area refers to the physical space or zone that a security device, network system, or signal can effectively monitor or reach. In surveillance systems, it means the area a camera can clearly view and record. For sensors and alarms, the coverage area indicates the range within which movement or intrusion can be detected. In networking, it describes how far a Wi-Fi signal or access point can provide a stable connection.

Coverage area defines the connectivity range of a device within which it will function. This is a crucial term for professionals and users to establish effective security or network systems around a property. When calculated perfectly, the systems have no blind spots or weak signal zones that interrupt the user experience.

Coverage Area

A covert camera is a hidden surveillance camera designed to record video without being easily noticed. It is often disguised as everyday objects such as smoke detectors, clocks, routers, or wall fixtures. Covert cameras are used to monitor areas discreetly where visible cameras might be avoided or tampered with. They help capture natural behavior without alerting people to the presence of surveillance.

Covert cameras also have advanced features that enhance their monitoring ability. These features include night vision, remote live monitoring, and motion detection, which prevent intrusion. Most commonly, you will find covert cameras for discrete recordings in offices, retail stores, commercial places, and even industrial facilities.

Covert Camera

In a DVR (Digital Video Recorder) or NVR (Network Video Recorder), a channel refers to a single input or connection point used to connect one camera to the recording system. Each channel supports one camera stream, meaning a 4-channel DVR or NVR can connect and manage up to four cameras, while a 16-channel system supports sixteen cameras. Channels are an important factor when planning a surveillance setup.

The total number of channels in NVR or DVR defines how many CCTV cameras can be connected to it, and the number of areas that can be monitored. Users will have to choose the right type of video recorder with the right number of channels to monitor their properties efficiently. It will reduce the chance of system overload and allow users to expand the surveillance zone later when needed.

What is Channel (DVR/NVR)?

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Glossary Terms Starting with "C"