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Electro-magnetic locks are a popular way to add security to a property. They don't require keys, eliminating the risk of unauthorized access to your building or office. EM locks also save the cost of replacing locks every time someone leaves the company. EM locks, prevent visitors from entering certain working areas of the building, where only a select group of employees are allowed entry.
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A public address, or loudspeaker, system that is used to make annoucments, notify or summon people. In large buildings, paging systems commonly are divided into a number of zones, or coverage areas. Key telephone systems commonly feature voice-over paging, which allows an authorized user to page through the intercom system, which works through the speakers built into the telephone sets.