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HS 31 (new developed register system, introduced in 1931, based on a new flat type relay and a 100-point two-motion selector, suitable for small and large exchanges) HS 52 (new developed register system, introduced in 1953, based on a new 120-point selector, which was in fact a 4 x 30-point uniselector with 2 x 4 brushes offset by 180°, no ...
The same year, a small transportable satellite communications earth station was set up in China. Shares of NEC common stock were listed on the Amsterdam Stock Exchange in 1973. NEC also designed an automated broadcasting system for the Japan Broadcasting Corporation in the same year. NEC Electronics (Europe) GmbH was also established.
A telephone exchange is a telephone system for a small geographic area that provides the switching (interconnection) of subscriber lines for calls made between them. Telephone exchanges replaced small telephone systems that connected its users with direct lines between each and every subscriber station.
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]
NEC Laboratories America was created in November 2002 through the merger of NEC Research Institute and NEC USA's Computer and Communications Research Laboratory. [14] NEC Laboratories succeeded in sending over 100 terabits of information per second through a single optical fibre in April 2011, establishing a new world record. [15]
In broadcast studio facilities, the name for the functional part has come to refer to the whole, and a telephone hybrid is the device that packages all the functions needed to connect telephone lines to studio audio systems, providing electrical and physical interface between the telco lines and studio equipment.
Solid-state digital systems were sometimes referred to as electronic private automatic branch exchanges (EPABX). As of 2021, the term PBX is by far the most widely recognized. [citation needed] The abbreviation now applies to all types of complex, in-house telephony switching systems.
EPABX (Electronic Private Automatic Branch Exchange) EPABX is an electronic device used in Offices, Hotels, Industries and many other places for voice communication. It is independent and can work with out any trunk lines (service providers) The main features offered by any EPABX system are: 1. Call transfer 2. Call pick up 3. Call back up 4.
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