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1980s MirTone intercom system. An intercom, also called an intercommunication device, intercommunicator, or interphone, is a stand-alone voice communications system for use within a building, small collection of buildings or portably within a small coverage area, which functions independently of the public telephone network. [1]
Such systems work similarly to normal wired intercom designs, with intercom stations using wires to connect to electrical outlets in rooms. This method of intercom connection is most useful in offices and homes served by a single electrical service. Products are available from a variety of manufacturers including Westinghouse and GE. [6] [7]
Microsoft Office InterConnect 2004 / 2007 (full version with all features) Microsoft Office InterConnect was released first in 2004, with Microsoft Office InterConnect 2004 and Microsoft Office InterConnect Lite, and another version was released in 2007, and was a part of the 2007 Microsoft Office System. Some updates were released for this ...
The "United" version of NX-2A replaced the intercabling connection blocks with wire wrap connections so that switches could be installed or expanded without having custom cable harnesses provided by North Electric. Switcher Family (NX-2A pre-installed in a trailer for rapid installation or portable/emergency use)
The principal switching and control modules were constructed on printed circuit boards, called Key Telephone Units (KTU). KTUs provided many system features, such as various types of line interfaces, dial intercom, music-on-hold, and alarms. Each central office telephone line connected to the system required at least one KTU.
The central office lines provide connections to the public switched telephone network (PSTN) and the concentration aspect of a PBX permits the shared use of these lines between all stations in the organization. Its intercommunication ability allows two or more stations to directly connect while not using the public switched telephone network.
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