|
TXK
TXK (Telephone eXchange Crossbar) was a range of Crossbar exchanges used by the British Post Office telephone network, subsequently BT, between 1964 and 1994. TXC was used as the designation at first, but this was later changed as TXC sounded too much like TXE the code used for later electronic exchanges. Prior to this the GPO had standardised on Strowger for automatic switching and had resisted the adoption of Crossbar, preferring to wait for its electronic switching research to bear fruit. The development of electronic systems however took longer than anticipated and the British equipment manufacturers, particularly Automatic Telephone & Electric (ATE), which later became part of the Plessey group feared that continuing to focus the bulk of their production on Strowger equipment would harm their export sales as Crossbar had already become popular throughout the world. In response to this, ATE, and later Plessey, developed their own crossbar system, the 5005, and pushed for th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Txk2
TXK (Telephone eXchange Crossbar) was a range of Crossbar exchanges used by the British Post Office telephone network, subsequently BT, between 1964 and 1994. TXC was used as the designation at first, but this was later changed as TXC sounded too much like TXE the code used for later electronic exchanges. Prior to this the GPO had standardised on Strowger for automatic switching and had resisted the adoption of Crossbar, preferring to wait for its electronic switching research to bear fruit. The development of electronic systems however took longer than anticipated and the British equipment manufacturers, particularly Automatic Telephone & Electric (ATE), which later became part of the Plessey group feared that continuing to focus the bulk of their production on Strowger equipment would harm their export sales as Crossbar had already become popular throughout the world. In response to this, ATE, and later Plessey, developed their own crossbar system, the 5005, and pushed for th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crossbar Switch
In electronics and telecommunications, a crossbar switch (cross-point switch, matrix switch) is a collection of switches arranged in a matrix configuration. A crossbar switch has multiple input and output lines that form a crossed pattern of interconnecting lines between which a connection may be established by closing a switch located at each intersection, the elements of the matrix. Originally, a crossbar switch consisted literally of crossing metal bars that provided the input and output paths. Later implementations achieved the same switching topology in solid-state electronics. The crossbar switch is one of the principal telephone exchange architectures, together with a rotary switch, memory switch, and a crossover switch. General properties A crossbar switch is an assembly of individual switches between a set of inputs and a set of outputs. The switches are arranged in a matrix. If the crossbar switch has M inputs and N outputs, then a crossbar has a matrix with ''M'' × ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Broughton, Lancashire
Broughton is a village and civil parish in the City of Preston, Lancashire, England, approximately north of Preston city centre. According to the 2001 census it had a population of 1,735, decreasing to 1,722 at the 2011 Census. The parish is included in Preston Rural East ward of Preston city council, and the Preston Rural division of Lancashire County council. The parish (officially Broughton-in-Amounderness) was part of Preston Rural District throughout its existence from 1894 to 1974. In 1974 the parish became part of the Borough of Preston, which became a city in 2002. History The manor of Broughton was originally part of the land owned by Earl Tostig and was later held by Uhtred, a Saxon thegn whose family took the name Singleton. In the reign of King John the manor was seized by Theobald Walter, but was restored to William Singleton by Henry III in 1261. It 1325 it was the home of Gilbert de Singleton. In the 16th century it was sold to the Langtons. The estate was g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colindale
Colindale is a district in the London Borough of Barnet; its main shopping street on the A5 forming the borough boundary with neighbouring Brent. Colindale is a suburban area, and in recent years has had many new apartments built. It's also the location of the 1960s-1970s Grahame Park housing estate, built on former parts of Hendon Aerodrome. It is situated about northwest of Charing Cross, directly northwest of Hendon, to the south of Edgware and east of Queensbury. History Formerly in the borough and ancient parish of Hendon, the area was essentially the dale between Mill Hill and The Burroughs. By the middle of the 20th century, it had come to include that part of the Edgware Road between The Hyde and Burnt Oak. The area was originally called Collin Deep after the 16th-century family of John Collin. Until the 20th century, Colindale was without any buildings save for a large house called Colindale Lodge, Colindale Farm and a few cottages. A spelling with two Ls, 'Collin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ericsson
(lit. "Telephone Stock Company of LM Ericsson"), commonly known as Ericsson, is a Swedish multinational networking and telecommunications company headquartered in Stockholm. The company sells infrastructure, software, and services in information and communications technology for telecommunications service providers and enterprises, including, among others, 3G, 4G, and 5G equipment, and Internet Protocol (IP) and optical transport systems. The company employs around 100,000 people and operates in more than 180 countries. Ericsson has over 57,000 granted patents. Ericsson has been a major contributor to the development of the telecommunications industry and is one of the leaders in 5G. The company was founded in 1876 by Lars Magnus Ericsson and is jointly controlled by the Wallenberg family through its holding company Investor AB, and the universal bank Handelsbanken through its investment company Industrivärden. The Wallenbergs and the Handelsbanken sphere acquired their v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
System X (telephony)
System X is the digital switching system installed in telephone exchanges throughout the United Kingdom, from 1980 onwards. History Development System X was developed by the Post Office (later to become British Telecom), GEC, Plessey, and Standard Telephones and Cables (STC), and was first shown in public in 1979 at the Telecom 79 exhibition in Geneva, Switzerland. STC withdrew from the project in 1982. In 1988, the telecommunications divisions of GEC and Plessey merged to form GPT, with Plessey subsequently being bought out by GEC and Siemens. In the late 1990s, GEC acquired Siemens' 40% stake in GPT. GEC renamed itself Marconi in 1999. When Marconi was sold to Ericsson in January 2006, Telent plc retained System X and continues to support and develop it as part of its UK services business. Implementation The first System X unit to enter public service was in September 1980 and was installed in Baynard House, London and was a 'tandem junction unit' which switched tele ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Araldite
Araldite is a registered trademark of Huntsman Advanced Materials (previously part of Ciba-Geigy) referring to their range of engineering and structural epoxy, acrylic, and polyurethane adhesives. Swiss manufacturers originally launched Araldite DIY adhesive products in 1946. The first batches of Araldite epoxy resins, for which the brand is best known, were made in Duxford, England in 1950. Araldite adhesive sets by the interaction of an epoxy resin with a hardener. Mixing an epoxy resin and hardener together starts a chemical reaction that produces heat - an exothermic reaction. It is claimed that after curing the bond is impervious to boiling water and to all common organic solvents. Araldite is available in many different types of pack, the most common containing two different tubes, one each for the resin and the hardener. Other variations include double syringe-type packages which automatically measure equal parts for mixing. History Aero Research Limited (ARL), founded in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Four-wire Circuit
In telecommunication, a four-wire circuit is a two-way circuit using two paths so arranged that the respective signals are transmitted in one direction only by one path and in the other direction by the other path. The four-wire circuit gets its name from the fact that is uses four conductors to create two complete electrical circuits, one for each direction. The two separate circuits (channels) allow full- duplex operation with low crosstalk. In telephony a four-wire circuit was historically used to transport and switch baseband audio signals in the phone company telephone exchange before the advent of digital modulation and the electronic switching system eliminated baseband audio from the telco plant except for the local loop. The local loop is a two-wire circuit for one reason only: to save copper. Using half the number of copper wire conductors per circuit means that the infrastructure cost for wiring each circuit is halved. Although a lower quality circuit, the local loop al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eltham
Eltham ( ) is a district of southeast London, England, within the Royal Borough of Greenwich. It is east-southeast of Charing Cross, and is identified in the London Plan as one of 35 major centres in Greater London. The three wards of Eltham North, South and West have a total population of 35,459. 88,000 people live in Eltham. History Origins Eltham developed along part of the road from London to Maidstone, and lies almost due south of Woolwich. Mottingham, to the south, became part of the parish on the abolition of all extra-parochial areas, which were rare anomalies in the parish system. Eltham College and other parts of Mottingham were therefore not considered within Eltham's boundaries even before the 1860s. From the sixth century Eltham was in the ancient Lathe of Sutton at Hone. In the Domesday Book of 1086 its hundred was named ''Gren[u/v]iz'' (Greenwich), which by 1166 was renamed ''Blachehedfeld'' Blackheath, Kent (hundred), (Blackheath) because it had become t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Croydon
Croydon is a large town in south London, England, south of Charing Cross. Part of the London Borough of Croydon, a local government district of Greater London. It is one of the largest commercial districts in Greater London, with an extensive shopping district and night-time economy. The entire town had a population of 192,064 as of 2011, whilst the wider borough had a population of 384,837. Historically an ancient parish in the Wallington hundred of Surrey, at the time of the Norman conquest of England Croydon had a church, a mill, and around 365 inhabitants, as recorded in the Domesday Book of 1086. Croydon expanded in the Middle Ages as a market town and a centre for charcoal production, leather tanning and brewing. The Surrey Iron Railway from Croydon to Wandsworth opened in 1803 and was an early public railway. Later 19th century railway building facilitated Croydon's growth as a commuter town for London. By the early 20th century, Croydon was an important industria ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ealing
Ealing () is a district in West London, England, west of Charing Cross in the London Borough of Ealing. Ealing is the administrative centre of the borough and is identified as a major metropolitan centre in the London Plan. Ealing was historically in the county of Middlesex. Until the urban expansion of London in the late 19th century and early 20th centuries, it was a rural village. Improvement in communications with London, culminating with the opening of the railway station in 1838, shifted the local economy to market garden supply and eventually to suburban development. By 1902 Ealing had become known as the "Queen of the Suburbs" due to its greenery, and because it was halfway between city and country. As part of the growth of London in the 20th century, Ealing significantly expanded and increased in population. It became a municipal borough in 1901 and part of Greater London in 1965. It is now a significant commercial and retail centre with a developed night-time econom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wood Green
Wood Green is a suburban district in the borough of Haringey in London, England. Its postal district is N22, with parts in N8 or N15. The London Plan identifies it as one of the metropolitan centres in Greater London, and today it forms a major commercial district of North London. Formerly lying within the western part of Tottenham and within the county of Middlesex, it became part of both Haringey and Greater London in 1965. Wood Green lies directly to the east of Alexandra Palace. It is from Charing Cross in central London. Toponymy The name Wood Green derives from ‘Woodlegh’ or 'Woodlea', a Saxon word meaning open ground near a wood, which in this case relates to an opening in Tottenham Wood, an extensive area of woodland which formerly covered most of this area and westward to Muswell Hill. The earliest surviving written record of ‘Woodlegh’ is a reference in documentation dating from 1256, which relates to a grant for Ducketts Manor, (a sub-manor of Tottenham) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Crossbar Switch")
.jpg "Click for more on -> Ealing")
