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List Of Telephone Switches
This list of telephone switches is a compilation of telephone switches used in the public switched telephone network (PSTN) or in large enterprises. American Digital Switching * Centura 2000 Alcatel This lists Alcatel switches before the merger with Lucent Technologies. * 1000 E10 / S12 (during the 1990s the E10 and S12 systems were converted into a single product line) * E10 versions: ** E10A (E10N3)- Original switch introduced in 1972 one of the earliest deployments of TDM switching in the world. ** E10B (E10N1)- Major revision in the 1980s which eventually saw ISDN capabilities. Common in France, Ireland, China, India and elsewhere. ** E10B3 - major revision in the 1990s. Common in France & Ireland ** OCB-283 - Another name for more modern versions of E10B and often the name used in India to distinguish it from older versions. ** E10-MT formerly Thomson MT-25 found mostly in France, and MT20 too. ** E10-Five E10B adapted for the North American environment as a class-5 switch. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telephone Switch
telephone exchange, telephone switch, or central office is a telecommunications system used in the public switched telephone network (PSTN) or in large enterprises. It interconnects telephone subscriber lines or virtual circuits of digital systems to establish telephone calls between subscribers. In historical perspective, telecommunication terms have been used with different semantics over time. The term ''telephone exchange'' is often used synonymously with ''central office'', a Bell System term. Often, a ''central office'' is defined as a building used to house the inside plant equipment of potentially several telephone exchanges, each serving a certain geographical area. Such an area has also been referred to as the exchange or exchange area. In North America, a central office location may also be identified as a ''wire center'', designating a facility to which a telephone is connected and obtains dial tone. For business and billing purposes, telecommunication carriers defin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Datang Telecom
Datang Telecom Group (officially Datang Telecom Technology & Industry Group) is a Chinese state-owned telecommunications equipment group headquartered in Beijing, China. The group was founded in September 1998 by the China Academy of Telecommunications Technology (CATT) and manufactures telecommunications equipment. It is best known for its leading role in developing the Chinese TD-SCDMA 3G mobile telecommunications standard through its subsidiary DT Mobile (formerly known as Datang Mobile). Datang Telecom Group also provides military communications infrastructure to the People's Liberation Army. History Datang Telecom Group was the trading name of the China Academy of Telecommunications Technology since September 1998. The academy itself was founded in 1957. In 1998 a limited company Datang Telecom Technology was also incorporated and floated in the Shanghai Stock Exchange on 21 October 1998. In April 2007, Datang secured a 36.6% share of China Mobile's first large-scale TD-SC ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fujitsu
is a Japanese multinational information and communications technology equipment and services corporation, established in 1935 and headquartered in Tokyo. Fujitsu is the world's sixth-largest IT services provider by annual revenue, and the largest in Japan, in 2021. The hardware offerings from Fujitsu are mainly of personal and enterprise computing products, including x86, SPARC and mainframe compatible server products, although the corporation and its subsidiaries also offer a diversity of products and services in the areas of data storage, telecommunications, advanced microelectronics, and air conditioning. It has approximately 126,400 employees and its products and services are available in approximately 180 countries. Fujitsu is listed on the Tokyo Stock Exchange and Nagoya Stock Exchange; its Tokyo listing is a constituent of the Nikkei 225 and TOPIX 100 indices. History 1935 to 2000 Fujitsu was established on June 20, 1935, which makes it one of the oldest operating ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AXE Telephone Exchange
The AXE telephone exchange is a product line of circuit switched digital telephone exchanges manufactured by Ericsson, a Swedish telecom company. It was developed in 1974 by Ellemtel, a research and development subsidiary of Ericsson and Televerket. The first system was deployed in 1976. AXE is not an acronym, but an Ericsson product code. The AXE is the digital successor to the AKE analogue telephone exchange and ARF/ARM family of crossbar switches. The design is modular with an APZ dual processor running in sync mode, an APT switching part and an APG I/O part. It is used for connecting local landlines, operating mobile networks ( TDMA, GSM, CDMA, W-CDMA, PDC), international telephony traffic and signaling. AXE based equipment are being used as BSC/TRC, MSC, HLR, SCP, FNR, TSC, STP and wireline nodes. The brain of the AXE system is a dual processor system called APZ. It runs in parallel sync mode making it fault redundant. The family of APZs started with APZ 210 03 in 1976; ... [...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] |
Hanwha
, former_name = Korea Explosives Group , type = Public , traded_as = , industry = Conglomorate , founded = , founder = Kim Chong-hee , hq_location_city = Seoul , hq_location_country = South Korea , area_served = Global , key_people = Kim Seung-yeon( Chairman and CEO) , revenue= ₩72,890,000,000,000 (2020) , operating_income = ₩2,927,888,000,000(Hanwha Corp. only) , net_income = ₩19,327,000,000(Hanwha Corp. only) , num_employees = 43,690 , num_employees_year = 2020 , subsid = , owners = Estate of Kim Seung-yeon (32.02%)Hanwha through treasury stock (8.08%)National Pension Service (8.67%) , homepage = https://www.hanwha.co.kr/ (Korean) https://www.hanwha.com (English) , footnotes = , intl = Hanwha Group () is a large business conglomerate ('' chaebol'') in South Korea. Founded in 1952 as Korea Explosives Co. (), the group has grown into a large multi-profile business conglomerate, with diversified holdings stretching from explosives, their origi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samsung
The Samsung Group (or simply Samsung) ( ko, 삼성 ) is a South Korean multinational manufacturing conglomerate headquartered in Samsung Town, Seoul, South Korea. It comprises numerous affiliated businesses, most of them united under the ''Samsung'' brand, and is the largest South Korean (business conglomerate). Samsung has the eighth highest global brand value. Samsung was founded by Lee Byung-chul in 1938 as a trading company. Over the next three decades, the group diversified into areas including food processing, textiles, insurance, securities, and retail. Samsung entered the electronics industry in the late 1960s and the construction and shipbuilding industries in the mid-1970s; these areas would drive its subsequent growth. Following Lee's death in 1987, Samsung was separated into five business groups – Samsung Group, Shinsegae Group, CJ Group and Hansol Group, and JoongAng Group. Notable Samsung industrial affiliates include Samsung Electronics (the wor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LGIC
Ligand-gated ion channels (LICs, LGIC), also commonly referred to as ionotropic receptors, are a group of transmembrane ion-channel proteins which open to allow ions such as Na+, K+, Ca2+, and/or Cl− to pass through the membrane in response to the binding of a chemical messenger (i.e. a ligand), such as a neurotransmitter. When a presynaptic neuron is excited, it releases a neurotransmitter from vesicles into the synaptic cleft. The neurotransmitter then binds to receptors located on the postsynaptic neuron. If these receptors are ligand-gated ion channels, a resulting conformational change opens the ion channels, which leads to a flow of ions across the cell membrane. This, in turn, results in either a depolarization, for an excitatory receptor response, or a hyperpolarization, for an inhibitory response. These receptor proteins are typically composed of at least two different domains: a transmembrane domain which includes the ion pore, and an extracellular domain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Korea Telecom
KT Corporation (Hangul: 주식회사 케이티), formerly Korea Telecom, is a South Korean telecommunications company. KT is the second-largest wireless carrier in South Korea, with 16.493 million subscribers as of Q4 2017. The formerly fully-state-owned firm (the government's National Pension Service currently owns 12.19% shares and is the largest shareholder) is South Korea's first telecommunications company and is a major supplier of the local landline and broadband internet market, serving about 90 percent of the country's fixed-line subscribers and 45 percent of high-speed Internet users. After selling its wireless affiliate Korea Mobile Telecom in 1994, KT returned to the wireless market with the creation of PCS carrier KTF in January 1997. The company's merger with KTF, its wireless subsidiary, in 2009 made it the country's ninth largest chaebol (conglomerate) with nearly 24 trillion won in assets as of 2009. In January 2011, KT launched unified brand "Olleh" for b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electronics And Telecommunications Research Institute
The Electronics and Telecommunications Research Institute () is a Korean government-funded research institution in Daedeok Science Town in Daejeon, Republic of Korea. Overview Established in 1976, ETRI is a non-profit government-funded research institute. In the 1980s, ETRI developed TDX (Time Division Exchange) and 4M DRAM (Dynamic Random Access Memory). In the 1990s, ETRI commercialized Code-division multiple access Code-division multiple access (CDMA) is a channel access method used by various radio communication technologies. CDMA is an example of multiple access, where several transmitters can send information simultaneously over a single communication .... In the 2000s, ETRI developed Terrestrial DMB, WiBro, and 4G LTE Advanced, for mobile communications. ETRI is one of the leading research institutes in the wireless communication domain with more than 2,500 patents filed. ETRI developed ship-area network technology, portable automatic language interpretation, and au ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dial Gate VoIP Softswitch
Dial-Gate VoIP Softswitch is a SIP-based IP- PBX software for businesses, first released in 2006 by Canadian VoIP PBX solution provider Dialexia. The software serves as a web-based softswitch and billing server for VoIP and PSTN networks. On June 3, 2014, the Dialexia development team announced in a client newsletter that support for Dial-Gate Softswitch versions 3.9 and earlier would cease effective September 1, 2014. The company advised customers to migrate to a currently-supported operating system in order to receive future security updates & technical support. Software overview The Dial-Gate billing platform provides users with advanced real-time monitoring, pre-/post-paid billing, rate/route table management, and CDR report generation. It is integrated with Microsoft Exchange Server to provide voicemail unification, instant messaging and VideoOverIP. On November 19, 2014, Dialexia issued a press release announcing the integration of WebRTC WebRTC (Web Real-Time Communi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dialexia
Dialexia Communications, Inc. is a privately held Canadian corporation headquartered in Montréal, Quebec, that develops, manufactures, and sells VoIP-based Telecommunication products and services. The company specializes in the development of webRTC-enabled PBX software for organizations in specific sectors of activity, notably education & hospitality. Dialexia software enables users to connect multiple phones (e.g., extension (telephone), extensions, ring groups, etc.), share lines among several phones and implement business PBX telephone phone features such as voicemail, caller ID, call forwarding & call recording into their virtual PBX. In a November 2014 press release, Dialexia announced the addition of WebRTC capabilities to its line of PBX software products. Founded in Montreal in 2001, the company is a member of the Board of Trade of Metropolitan Montreal. History Soon after its establishment, Dialexia released Dial-Office IP-PBX, an IP PBX platform designed as an al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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