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A telephone, colloquially referred to as a phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be easily heard directly. A telephone converts sound, typically and most efficiently the human voice, into electronic signals that are transmitted via cables and other communication channels to another telephone which reproduces the sound to the receiving user. The term is derived from Ancient Greek: τῆλε, romanized: tēle, lit. 'far' and φωνή, together meaning distant voice.
Telephony is the field of technology involving the development, application, and deployment of telecommunication services for the purpose of electronic transmission of voice, fax, or data, between distant parties. The history of telephony is intimately linked to the invention and development of the telephone.
Voice over Internet Protocol (VoIP), also called IP telephony, is a method and group of technologies for voice calls for the delivery of voice communication sessions over Internet Protocol (IP) networks, such as the Internet.
A voicemail system is a computer-based system that allows people to leave a recorded message when the recipient is unable to answer the phone. The caller is prompted to leave a message and the recipient can retrieve said message at a later time.
Vonage Holdings Corp. is an American cloud communications provider operating as a subsidiary of Ericsson. Headquartered in Holmdel Township, New Jersey, the organization was founded in 1998 as Min-X as a provider of residential telecommunications services based on voice over Internet Protocol (VoIP). In 2001, the organization changed its name to Vonage.
Asterisk is a software implementation of a private branch exchange (PBX). In conjunction with suitable telephony hardware interfaces and network applications, Asterisk is used to establish and control telephone calls between telecommunication endpoints such as customary telephone sets, destinations on the public switched telephone network (PSTN) and devices or services on voice over Internet Protocol (VoIP) networks. Its name comes from the asterisk (*) symbol for a signal used in dual-tone multi-frequency (DTMF) dialing.
Voice over wireless LAN (VoWLAN), also voice over Wi‑Fi (VoWiFi), is the use of a wireless broadband network according to the IEEE 802.11 standards for the purpose of vocal conversation. In essence, it is voice over IP (VoIP) over a Wi-Fi network. In most cases, the Wi-Fi network and voice components supporting the voice system are privately owned.
VocalTec Communications Inc. is an Israeli telecom equipment provider. The company was founded in 1985 by Alon Cohen and Lior Haramaty, who patented the first Voice over IP audio transceiver. VocalTec has supplied major customers such as Deutsche Telekom, Telecom Italia, and many others.
Alon Cohen is the co-founder of VocalTec Inc. (1989) and the co-inventor of the Audio Transceiver that enabled the creation of Voice Over Networks products and eventually the VoIP industry. Cohen holds four US patents on different communications technologies. He is currently Executive VP and CTO at Phone.com.
Jeff Pulver is an American Internet entrepreneur and futurist known for his work as an innovator in the field of Voice over Internet Protocol (VoIP). Pulver's early work in VoIP with his company Free World Dialup led to a significant regulatory decision by the Federal Communications Commission in 2004 which classified VoIP as an internet application, rather than as a telephony service which would be subject to government tariffs and regulations, a decision which paved the way for the development of video and voice internet communications.
Convergence Technologies Professional was a certification program designed to ensure that all convergence workers have a proper foundation for using the technologies associated with Voice over IP. Individuals can take the CTP+ exam to demonstrate their knowledge of technologies and best practices including codecs, network planning, troubleshooting, providing quality video, and voice over data networks. The certification was retired in 2011.
Snom Technology GmbH is a German company which manufactures Voice over Internet Protocol (VoIP) telephones, based on the IETF standard Session Initiation Protocol (SIP). Snom's products are targeted at the small- to medium-sized business sector, home offices, Internet service providers, carriers, and original equipment manufacturers. The company, founded in 1996 and headquartered in Berlin, is a wholly owned subsidiary of VTech Holdings Limited, since 2016.
ITXC Corporation was a US-based wholesale provider of voice over IP internet-based phone calls.
Deltathree Inc. is an American company engaged in the business of voice over IP telephony services. The company was one of the first in the world to offer a telephony service over the internet, reducing the cost of international calls by over 90 percent.
MagicJack, often stylized as magicJack, is an Internet-based telephone service (VoIP) provider in the United States and Canada. It offers nationwide VoIP and cellphone services.
TouchWave, Inc., was a privately held Palo Alto, California IP-telephony network switch provider founded in 1997. TouchWave developed a product line called WebSwitch that was designed to replace traditional private telephone exchange systems in small-to-medium-sized companies. WebSwitch was part of a phone system that incorporates communication features provided by the Internet. The rapid success of TouchWave was memorialized with awards and an acquisition by Ericsson Communications for $46M two years after TouchWave was founded. Ericsson continued the TouchWave product line under the name WebCom, but its efforts have been viewed as less than successful.
Cloud communications are Internet-based voice and data communications where telecommunications applications, switching and storage are hosted by a third-party outside of the organization using them, and they are accessed over the public Internet. Cloud services is a broad term, referring primarily to data-center-hosted services that are run and accessed over an Internet infrastructure. Until recently, these services have been data-centric, but with the evolution of VoIP, voice has become part of the cloud phenomenon. Cloud telephony refers specifically to voice services and more specifically the replacement of conventional business telephone equipment, such as a private branch exchange (PBX), with third-party VoIP service.
Elon A. Ganor is an Israeli entrepreneur known for his role as one of the world's first VoIP pioneers. He served as chairman and CEO of VocalTec Ltd, the company behind the creation of "Internet Phone", the world's first commercial software product that enabled voice communication over the internet, known initially as "Internet Telephony" and later as VoIP.
Daniel Nissan is an Israeli-American Internet entrepreneur who had a leading role in the development of VoIP, e-commerce and marketing automation. Since 1993 Nissan has been a senior executive, co-founder and CEO with three companies: VocalTec, who patented the first Voice over IP audio transceiver and released the first VoiP software (1995), NetGrocer, the first online, nationwide ecommerce supermarket (1996), and StructuredWeb, the first marketing automation software for local and channel marketing (1999).
VoIP vulnerabilities are weaknesses in the VoIP protocol or its implementations that expose users to privacy violations and other problems. VoIP is a group of technologies that enable voice calls online. VoIP contains similar vulnerabilities to those of other internet use.
References
- ↑ "Biographies of New Directions in Telecom forum participants". doc.gov.
- ↑ U.S. patent 5,825,771
- ↑ "Internet Telephony October 2006 Publisher's Outlook". Communications and Technology Blog - Tehrani.com.
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