Paging Systems

Paging Systems

 

internal communications systems used at enterprises or institutions to summon employees or to transmit business information to them. There are two types of systems: wired and wireless.

Wired paging systems may transmit visual, acoustic, or voice signals. In a system that transmits visual signals, the signal is displayed on an indicator board or by means of signaling lamps of a specific color; such a system is used chiefly in manufacturing areas where the noise level is high. In systems using acoustic signals, employees are usually summoned by means of a bell, chiefly in “supervisor-to-secretary” systems. In a voice system, the message may be transmitted on a public-address system with loudspeakers located on the premises of an enterprise and in the work areas. A variant of this system uses a loudspeaker attachment on a telephone apparatus that makes it possible to call an employee without his having to lift the receiver. Voice systems are used for dispatcher communications in industrial enterprises and institutions and at construction sites.

The principle of operation and the facilities of a wireless paging system are similar to those of a radio communications system. Such a system permits employees to be found quickly on the premises of an enterprise without disturbing other people, and it can also be used to exchange brief messages while the two speakers remain at their work positions. Wireless paging systems may be either of the very high frequency (VHF) or the inductive type. The VHF systems consist of a central transmitter and small transceivers, each of which is tuned to a specific frequency in the VHF range. Inductive systems transmit signals with a low-frequency power amplifier that is connected to a closed wire loop laid out around the perimeter of an enterprise. When an employee is called, the electromagnetic field created by the loop induces an electromotive force in the antenna of the individual receiver. For selective calling, each receiver is tuned to a specific frequency. Wireless paging systems are used in institutions and at industrial enterprises; they also have applications in transportation.

I. S. DEMIDOV

References in periodicals archive ?
InformaCast Fusion reaches people on mobile platforms, as well as through in-building devices that many organizations already have in place, including desk phones, overhead paging systems, IP speakers, digital signage, and computer desktops.
Based on its franchise, Now Telecom would be able to build, operate and maintain mobile radio systems such as radio paging systems, cellular phone systems, personal communications networks and trunked radio systems.
Based on its franchise, NOW Telecom is granted a franchise to construct, establish, operate, and maintain mobile radio systems such as radio paging systems, cellular phone systems, personal communication network (PCN), and trunked radio systems.
The FXI-1A interfaces phone systems to paging systems in a variety of ways.
"With our legacy paging systems, after the install is complete, you're tied into X number of paging zones," Hoffman said.
Request for registration of contractors regarding the supply & maintenance of a wide variety of IT and office equipment including telephone exchanges, electronic gates, computers, copiers, telefax machines & related operating consumables, copying paper, office furniture and steel safes, toner for printers, control cameras, photographic cameras and paging systems. Registration forms are to download from www.sfdegypt.org .
CDI Technology specialises in the provision of point-of-sale, telecommunications and paging systems to the catering and hotel industry in southeastern Michigan and western Ohio.
Switching to IP modernizes analog intercom and paging systems by capitalizing on the rising IP convergence trend that combines audio, video, and data onto the local area and wide area networks.
Issues such as stock-outs and return stations reaching full capacity will trigger an automated alert via e-mail, various paging systems or other mobile devices.
DALLAS -- Wireless paging systems are increasingly being used by retail pharmacies to improve the way patients are notified when their prescriptions can be picked up at pharmacy counters, a company that provides the systems says.
With the new technology available today, 100-decibel door alarms and loud paging systems really aren't necessary.