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VSaaS or Video Surveillance as a Service is a ‘Cloud’ or offsite version of the NVR, DVR or dedicated Video Server (a ‘Cloud NVR’ or ‘Cloud VMS’) created to eliminate the high expense, risk and limitations of onsite CCTV Video Management Systems.

A Private Branch Exchange (PBX) is traditionally an ‘Onsite’ box of electronics that runs the software that makes the desk phones (extensions) in a business phone system function. In 2021 thanks to VoIP (Voice Over Internet Protocol), this software can also reside ‘Offsite’ and be delivered via the Internet - this is known as a 'Cloud PBX'.

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