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ITSP
An Internet telephony service provider (ITSP) offers digital telecommunications services based on Voice over Internet Protocol (VoIP) that are provisioned via the Internet. ITSPs provide services to end-users directly or as whole-sale suppliers to other ITSPs. ITSPs use a variety of signaling and multimedia protocols, including the Session Initiation Protocol (SIP), the Media Gateway Control Protocol (MGCP), Megaco, and the H.323 protocol. H.323 is one of the earliest VoIP protocols, but its use is declining and it is rarely used for consumer products. Retail customers of an ITSP may use traditional analog telephone sets attached to an analog telephony adapter (ATA) to connect to the service provider's network via a local area network, they may use an IP phone, or they may connect a private branch exchange (PBX) system to the service via media gateways. ITSPs are also known as voice service providers (VSP). History In the United States, net2Phone began offering consumer VoIP ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SIP Trunking
SIP trunking is a voice over Internet Protocol (VoIP) technology and streaming media service based on the Session Initiation Protocol (SIP) by which Internet telephony service providers (ITSPs) deliver telephone services and unified communications to customers equipped with SIP-based private branch exchange (IP-PBX) and unified communications facilities. Most unified communications applications provide voice, video, and other streaming media applications such as desktop sharing, web conferencing, and shared whiteboard. Domains The architecture of SIP trunking provides a partitioning of the unified communications network into two different domains of expertise: * Private domain: refers to a part of the network connected to a PBX or unified communications server. * Public domain: refers to the part of the network which allows access into the public switched telephone network (PSTN) or public land mobile network (PLMN). The interconnection between the two domains must occur through a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VoIP
Voice over Internet Protocol (VoIP), also called IP telephony, is a method and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. The terms Internet telephony, broadband telephony, and broadband phone service specifically refer to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the Internet, rather than via the public switched telephone network (PSTN), also known as plain old telephone service (POTS). Overview The steps and principles involved in originating VoIP telephone calls are similar to traditional digital telephony and involve signaling, channel setup, digitization of the analog voice signals, and encoding. Instead of being transmitted over a circuit-switched network, the digital information is packetized and transmission occurs as IP packets over a packet-switched network. They transport media streams using special media delivery protocol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Session Initiation Protocol
The Session Initiation Protocol (SIP) is a signaling protocol used for initiating, maintaining, and terminating communication sessions that include voice, video and messaging applications. SIP is used in Internet telephony, in private IP telephone systems, as well as mobile phone calling over LTE (VoLTE). The protocol defines the specific format of messages exchanged and the sequence of communications for cooperation of the participants. SIP is a text-based protocol, incorporating many elements of the Hypertext Transfer Protocol (HTTP) and the Simple Mail Transfer Protocol (SMTP). A call established with SIP may consist of multiple media streams, but no separate streams are required for applications, such as text messaging, that exchange data as payload in the SIP message. SIP works in conjunction with several other protocols that specify and carry the session media. Most commonly, media type and parameter negotiation and media setup are performed with the Session Descripti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Voice Over Internet Protocol
Voice over Internet Protocol (VoIP), also called IP telephony, is a method and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. The terms Internet telephony, broadband telephony, and broadband phone service specifically refer to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the Internet, rather than via the public switched telephone network (PSTN), also known as plain old telephone service (POTS). Overview The steps and principles involved in originating VoIP telephone calls are similar to traditional digital telephony and involve signaling, channel setup, digitization of the analog voice signals, and encoding. Instead of being transmitted over a circuit-switched network, the digital information is packetized and transmission occurs as IP packets over a packet-switched network. They transport media streams using special media delivery protocols ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telecommunications Service
In telecommunication, a telecommunications service is a service provided by a telecommunications provider, or a specified set of user-information transfer capabilities provided to a group of users by a telecommunications system. The telecommunications service user is responsible for the information content of the message. The telecommunications service provider has the responsibility for the acceptance, transmission, and delivery of the message. For purposes of regulation by the Federal Communications Commission under the U.S. Communications Act of 1934 and Telecommunications Act of 1996, the definition of telecommunications service is "the offering of telecommunications for a fee directly to the public, or to such classes of users as to be effectively available directly to the public, regardless of the facilities used." ''Telecommunications'', in turn, is defined as "the transmission, between or among points specified by the user, of information of the user’s choosing, without c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of VoIP Companies
is a list of notable companies providing voice over Internet Protocol (VoIP) services. {, class="wikitable sortable" , - ! Company !! Base of operations !! Country !! Services provided , - , EMAXX , , Concord, Ontario , , Canada , , A-Z voip routes seller , - , Access Communications , , Regina, Saskatchewan , , Canada , , Cable television services , - , AstraQom , , Ottawa, Ontario , , Canada , , VoIP services and integrated communication solutions , - , AudioCodes , , Airport City , , Israel , , Networking products and applications to service providers and enterprises , - , AVM GmbH , , Berlin , , Germany , , DSL, ISDN, Wireless, and VoIP products for communications devices , - , BigAir , , Sydney , , Australia , , DSL services and Australia's National Broadband Network , - , Comwave , , Toronto , , Canada , , Web and Mobile applications, VoIP telephone service, broadband internet providers, and commercial telecommunication service , - , Fastw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inphonex
InPhonex is a telecommunications firm offering telephony services in more than 150 countries. Miami-based InPhonex serves communications service providers, businesses of all sizes, Managed Service Providers (MSPs), value-added resellers (VARs) and consumers, under its own and other brands. Offerings include unified communications (UCaaS), web and mobile applications, services and utilities, such as business phone service, VoIP, hosted PBX, SIP trunking, product creation and provisioning. History InPhonex was created in 2003 by Bill Nesbitt and Kooi Lim to capitalize on the opportunity to spread the revolution of VoIP communications technology. Nesbitt founded Hiway Technologies, which was acquired by Verio in 1998 for $400 million. Lim founded Superclone, which sold more than $150 million in computers and computer components from 1988 to 2004. In 1996 Lim also founded KCL.net, an ISP that provides hosting, collocation, and broadband services to businesses and consumers. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Route
In telecommunications business, a white route is a route where both source and destination are legal termination. This is opposed to a black route, which is a route that is illegal in both ends. Also common in telecom (especially VoIP) is the term grey route, which defines a route that is legal for one country or the party on one end, but illegal on the alternative end. An example of the white/grey/black trichotomy is often seen in telecom routes from the United States to India. In India, a telecom oligopoly is granted to a few large corporations. Hence, all legal ("white") telecom traffic to the country is subject to the rates imposed by these corporations. To overcome this restriction for the purpose of achieving lower costs for consumers, and to make a profit in the process, many small parties set up VoIP routers in homes and offices around India. Telecom traffic from other countries is sent to these VoIP routers via IP and terminated to the local Indian PSTN. This proce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White Route
In telecommunications business, a white route is a route where both source and destination are legal termination. This is opposed to a black route, which is a route that is illegal in both ends. Also common in telecom (especially VoIP) is the term grey route, which defines a route that is legal for one country or the party on one end, but illegal on the alternative end. An example of the white/grey/black trichotomy is often seen in telecom routes from the United States to India. In India, a telecom oligopoly is granted to a few large corporations. Hence, all legal ("white") telecom traffic to the country is subject to the rates imposed by these corporations. To overcome this restriction for the purpose of achieving lower costs for consumers, and to make a profit in the process, many small parties set up VoIP routers in homes and offices around India. Telecom traffic from other countries is sent to these VoIP routers via IP and terminated to the local Indian PSTN. This proc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Business Telephone System
A business telephone system is a multiline telephone system typically used in business environments, encompassing systems ranging in technology from the key telephone system (KTS) to the private branch exchange (PBX). A business telephone system differs from an installation of several telephones with multiple central office (CO) lines in that the CO lines used are directly controllable in key telephone systems from multiple telephone stations, and that such a system often provides additional features related to call handling. Business telephone systems are often broadly classified into key telephone systems, and private branch exchanges, but many hybrid systems exist. A key telephone system was originally distinguished from a private branch exchange in that it did not require an operator or attendant at the switchboard to establish connections between the central office trunks and stations, or between stations. Technologically, private branch exchanges share lineage with centra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Net2Phone
Net2phone provides VoIP and cloud computing-based telephony products and services. The company is a subsidiary of IDT Corporation. History Net2Phone was founded in 1990. On July 30, 1999, during the dot-com bubble, the company became a public company via an initial public offering, raising $81 million. Shares rose 77% on the first day of trading to $26 per share. After completion of the IPO, IDT owned 57% of the company. Within a few weeks, the shares increased another 100% in value, to $53 per share. In March 2000, in a transaction facilitated by IDT CEO Howard Jonas, a consortium of telecommunications companies led by AT&T announced a $1.4 billion investment for a 32% stake in the company, buying shares for $75 each. The transaction was completed in August 2000. AOL had expressed an interest in buying all or part of the company but was not agreeable to the price. In 2000, the company acquired Aplio, an internet appliance maker located in San Bruno, California. In August 2000 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Local Area Network
A local area network (LAN) is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building. By contrast, a wide area network (WAN) not only covers a larger geographic distance, but also generally involves leased telecommunication circuits. Ethernet and Wi-Fi are the two most common technologies in use for local area networks. Historical network technologies include ARCNET, Token Ring and AppleTalk. History The increasing demand and usage of computers in universities and research labs in the late 1960s generated the need to provide high-speed interconnections between computer systems. A 1970 report from the Lawrence Radiation Laboratory detailing the growth of their "Octopus" network gave a good indication of the situation. A number of experimental and early commercial LAN technologies were developed in the 1970s. Cambridge Ring was developed at Cambridge University starting in 1974 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
