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2. Network video recorder - Wikipedia

   en.wikipedia.org/wiki/Network_Video_Recorder

   Simple NVR-based camera system. A network video recorder (NVR) is a specialized computer system that records video [1] to a disk drive, USB flash drive, memory card, or other mass storage device. An NVR itself contains no cameras, but connects to them through a network, typically as part of an IP video surveillance system.

3. Professional video over IP - Wikipedia

   en.wikipedia.org/wiki/Professional_video_over_IP

   Within the security products industry, IP-based Closed Circuit Television (CCTV) has made gains over the analog market. Key components of IP-based CCTV remain consistent with analog technologies: image capture, with a combination of IP-based cameras or analog cameras using IP-based encoders; image transmission; Storage and Retrieval, which uses ...

4. Wireless security camera - Wikipedia

   en.wikipedia.org/wiki/Wireless_security_camera

   Analog wireless is found in three frequencies: 900 MHz, 2.4 GHz, and 5.8 GHz. Currently, the majority of wireless security cameras operate on the 2.4 GHz frequency. Most household routers, cordless phones, video game controllers, and microwaves operate on the 2.4 GHz frequency and may cause interference with a wireless security camera.

5. IP camera - Wikipedia

   en.wikipedia.org/wiki/IP_camera

   An Internet Protocol camera, or IP camera, is a type of digital video camera that receives control data and sends image data via an IP network. They are commonly used for surveillance , but, unlike analog closed-circuit television (CCTV) cameras, they require no local recording device, only a local area network .

6. Home security - Wikipedia

   en.wikipedia.org/wiki/Home_security

   Surveillance cameras used in houses are IP cameras or closed circuit. IP cameras connect over the internet and stream to users’ phones using a Wi-Fi connection. Closed-circuit, or CCTV cameras, stream through wired or wireless links. [9] These cameras stream live footage to users, allowing them to watch for suspicious activity.

7. Voice over IP - Wikipedia

   en.wikipedia.org/wiki/Voice_over_IP

   1991: Speak Freely, a voice-over-IP application, was released to the public domain. [92] [93] 1992: The Frame Relay Forum conducts development of standards for voice over Frame Relay. 1992: InSoft Inc. announces and launches its desktop conferencing product Communique, which includes VoIP and video.