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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
A telephone exchange, telephone switch, or central office is a central component of a telecommunications system in the public switched telephone network (PSTN) or in large enterprises. It facilitates the establishment of communication circuits, enabling telephone calls between subscribers. The term "central office" can also refer to a central location for fiber optic equipment for a fiber internet provider. In historical perspective, telecommunication terminology has evolved with time. The term ''telephone exchange'' is often used synonymously with ''central office'', a Bell System term. A central office is defined as the telephone switch controlling connections for one or more central office prefixes. However, it also often denotes the building used to house the inside plant equipment for multiple telephone exchange areas. In North America, the term ''wire center'' may be used to denote a central office location, indicating a facility that provides a telephone with a dial tone ... [...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. 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 sells equipment to Chinese mobile network operators and also provides military communications infrastructure to the People's Liberation Army. History Datang Telecom Group was founded on September 21 1998 by the China Academy of Telecommunications Technology (CATT) and manufactures telecommunications equipment. It has been 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 s ... [...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 landline A landline is a physical telephone connection that uses metal wires or optical fiber from the subscriber's premises to the network, allowing multiple phones to operate simultaneously on the same phone number. It is also referred to as plain old ...s, operating mobile networks (Digital AMPS, TDMA, GSM, Code division multiple access, CDMA, W-CDMA, Personal Digital Cellular, PDC ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ericsson
(), commonly known as Ericsson (), is a Swedish multinational networking and telecommunications company headquartered in Stockholm, Sweden. Ericsson has been a major contributor to the development of the telecommunications industry and is one of the leaders in 5G. Ericsson has over 57,000 granted patents and it is the inventor of Bluetooth technology. The company sells infrastructure, software, and services in information and communications technology for telecommunications service providers and enterprises, including, among others, cellular 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. The company is listed on the Nasdaq Stockholm under the ticker symbols ERIC.A and ERIC.B and on the American Nasdaq under the ticker symbol ERIC. The company was founded in 1876 by Lars Magnus Ericsson and is jointly controlled by the Wallenberg family through its holding company ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hanwha
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 explosivestheir original businessto energy, materials, aerospace, mechatronics, finance, retail, and lifestyle services. In 1992, the company adopted its abbreviation as its new name: "Hanwha". History 1952–1999 Kim Chong-hee founded Korea Explosives Co. in October 1952. Prior to founding the company, Kim worked as a Explosives engineering, gunpowder engineer for the "Chosun Explosives Factory", a Japanese company. Later, he won the bid for the company and its Incheon factory and started the company there. From 1952 to 1963, the Korea Explosives Co. produced industrial explosives domestically, which was needed for construction and engineering of infrastructure. In the same time period, the Korea Explosives Co. started producing nitroglycerin, whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samsung
Samsung Group (; stylised as SΛMSUNG) is a South Korean Multinational corporation, multinational manufacturing Conglomerate (company), conglomerate headquartered in the Samsung Town office complex in Seoul. The group consists of numerous affiliated businesses, most of which operate under the Samsung brand, and is the largest (business conglomerate) in South Korea. Samsung has the world's List of most valuable brands, fifth-highest brand value. Founded in 1938 by Lee Byung-chul as a trading company, Samsung diversified into various sectors, including food processing, textiles, insurance, securities, and retail, over the next three decades. In the late 1960s, Samsung entered the electronics industry, followed by the construction and shipbuilding sectors in the mid-1970s—areas that would fuel its future growth. After Lee died in 1987, Samsung was divided into five business groups: Samsung Group, Shinsegae Group, CJ Group, Hansol Group, and JoongAng Ilbo, JoongAng Group. K ... [...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 w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Korea Telecom
KT Corporation (Hangul: 주식회사 케이티), formerly Korea Telecom, is a South Korean telecommunications company, mobile network operator (MNO) and mobile virtual network operator (MVNO). KT is the third-largest wireless carrier in South Korea, with 13.5 million subscribers as of Q4 2023. 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 asset ... [...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, South 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. 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 automated valet parking technology. As of December 14, 2015, ETRI had about 2,000 employees of which about 1,800 are researchers. Chronology Awards * Ho-Am Prize in Science in 1991 References External links * *ETRI Webzine [...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. Overview 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., 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 alternative ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
