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While low-quality domestic kits are cheap, the professional installation and maintenance of high definition CCTV is expensive. [43] Gill and Spriggs did a cost-effectiveness analysis (CEA) of CCTV in crime prevention that showed little monetary saving with the installation of CCTV as most of the crimes prevented resulted in little monetary loss ...
Unlike PCs, most DVRs designed for CCTV purposes are embedded devices that require less maintenance and simpler setup than a PC-based solution, for a medium to a large number of analogue cameras. Some DVRs also allow digital broadcasting of the video signal, thus acting like a network camera.
The Underwriters Laboratories' UL 2610 is a comprehensive safety standard that governs the construction, performance, operation, and maintenance of security alarm systems and units for commercial premises, such as mercantile and banking locations. The standard details requirements for a range of alarm systems including central station burglar ...
An "in-service" or "maintained as" specification, specifies the conditions of a system or object after years of operation, including the effects of wear and maintenance (configuration changes). Specifications are a type of technical standard that may be developed by any of various kinds of organizations, in both the public and private sectors.
An example of this is the deployment of security personnel conducting checks for authorized entry at predetermined points of entry. This form of access control is usually supplemented by the earlier forms of access control (i.e. mechanical and electronic access control), or simple devices such as physical passes.
The vast majority of computer surveillance involves the monitoring of data and traffic on the Internet. [9] In the United States for example, under the Communications Assistance For Law Enforcement Act, all phone calls and broadband Internet traffic (emails, web traffic, instant messaging, etc.) are required to be available for unimpeded real-time monitoring by federal law enforcement agencies.
In Canada, the Underwriters' Laboratories of Canada or ULC provides fire system installation standards. TS 54 -14 is a technical specification (CEN/TS) for fire detection and fire alarm systems (Part 14: Guidelines for planning, design, installation, commissioning, use, and maintenance).
Some usages are Installation Guide, Getting Started Guide, and various How to guides. An example is the Picasa Getting Started Guide. [5] In some business software applications, where groups of users have access to only a sub-set of the application's full functionality, a user guide may be prepared for each group.