Locksmith Staten Island intercom services

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24 hour intercom service Staten Island NY. Available for all your intercom and Locksmith needs: we specialize in sales service and installations. When contacting us you will have a quick response to all your lock needs in Staten Island queens ny!

Intercoms

An intercom (intercommunication device), talkback or doorphone is a stand-alone electronic communications system intended for limited or private dialogue. Intercoms can be portable but are generally mounted permanently in buildings and vehicles. Intercoms can incorporate connections to walkie talkies, telephones, cell phones and to other intercom systems over phone or data lines and switch electronic or electro-mechanical devices such as signal lights and door latches.

Intercoms are not to be confused with "Telephone Door Entry" systems, where the 'Intercom' facility is an option available on a system in which instruments within a building can be used to intercommunicate with each other (usually a single-dwelling), or where apartments can communicate internally with a resident porter.

    

Permanent systems

Traditional intercom systems are composed entirely of analogue electronics components but many new features and interfacing options can be accomplished with new intercom systems based on digital connections. Video signals can be interlaced with the more familiar audio signals. Digital intercom stations can be connected using Cat 5 cable and can even use existing computer networks as a means of interfacing distant parties.

Portable systems

Portable intercoms are commonly used by special event production crews and professional sports teams. Performing arts venues such as theaters and concert halls often have a combination of permanently mounted and portable intercom elements. Motorsports race tracks often have both portable and permanent intercom stations mounted at critical points around the racecourse for use by race officials and emergency medical technicians.

Operation

This device was a 'shear' magnetic lock, as opposed to the original (and now ubiquitous) 'direct pull' electromagnetic locks and was an improvement on a 1984 patent cited in the same document.