Integrated Services Digital Network (ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the digitalised circuits of the public switched telephone network. Work on the standard began in 1980 at Bell Labs and was formally standardized in 1988 in the CCITT "Red Book". By the time the standard was released, newer networking systems with much greater speeds were available, and ISDN saw relatively little uptake in the wider market. One estimate suggests ISDN use peaked at a worldwide total of 25 million subscribers at a time when 1.3 billion analog lines were in use. ISDN has largely been replaced with digital subscriber line (DSL) systems of much higher performance.
Telecommunications in Uruguay includes radio, television, telephones, and the Internet.
Telecommunications in Israel are the most developed in the Middle East. Israel's system consists of coaxial cables, optical fibers, and microwave radio relay. Prior to the 1990s, Israel's telecommunication market was dominated by Bezeq, a government-owned corporation. During the 1990s, the Israeli telecommunication industry transitioned from government owned monopolies to diversified private competition by a range of new companies. As of 2014, the telecommunications sector in Israel had revenues over ₪15 billion, representing about 2% of the GDP.
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 landline is a telephone connection that uses metal wires from the owner's premises also referred to as: POTS, Twisted pair, telephone line or public switched telephone network (PSTN).
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.
A naked DSL, also known as standalone or dry loop DSL, is a digital subscriber line (DSL) without a PSTN service — or the associated dial tone. In other words, only a standalone DSL Internet service is provided on the local loop.
The 21st Century Network (21CN) programme is the data and voice network transformation project, under way since 2004, of the UK telecommunications company BT Group plc. It was intended to move BT's telephone network from the AXE/System X Public Switched Telephone Network (PSTN) to an Internet Protocol (IP) system. As well as switching over the PSTN, BT planned to deliver many additional services over their new data network, such as on-demand interactive TV services.
BT Broadband is a broadband service offered by BT Consumer; a division of BT Group in the United Kingdom. It was formerly known as BT Total Broadband, BT Yahoo! Broadband and BT Openworld. With the introduction of BT Infinity, the Broadband package now refers to the legacy ADSL broadband products, such as ADSL Max and ADSL2+.
Jajah was a VoIP provider, founded by Austrians Roman Scharf and Daniel Mattes in 2005. The Jajah headquarters was located in Mountain View, CA, USA, and Luxembourg. Jajah maintained a development centre in Israel. On 23 December 2009, it was announced that Jajah had been bought by Telefónica through its subsidiary Telefónica Europe. In December 2013, Telefónica announced that Jajah would shut down at the end of January 2014.
Exetel is an Australian ISP which provides ADSL, web hosting, VoIP, and other internet services to customers across Australia. Exetel's headquarters are in offices in Sydney, and its switching centres are distributed in capital city secure data centre facilities around mainland Australia.
Moldtelecom is a Moldovan state-owned telecommunications company headquartered in Chişinău. In September 2023, Moldtelecom held a dominant position in the fixed-line telephony market (89%). However, its market share was lower in other sectors: broadband internet (56.4%), pay television (55%) and mobile telephony (9%).
Sipgate, stylised as sipgate, is a European VoIP and mobile telephony operator.
Wi-Fi calling refers to mobile phone voice calls and data that are made over IP networks using Wi-Fi, instead of the cell towers provided by cellular networks. Using this feature, compatible handsets are able to route regular cellular calls through a wireless LAN (Wi-Fi) network with broadband Internet, while seamlessly change connections between the two where necessary. This feature makes use of the Generic Access Network (GAN) protocol, also known as Unlicensed Mobile Access (UMA).
International telephone calls are those made between different countries. These telephone calls are processed by international gateway exchanges (switches). Charges for these calls were high initially but declined greatly during the 20th century due to advances in technology liberalization. Originally they were placed via long-distance operators. The calls were transmitted by cable, communications satellite, radio, and more recently, fiber optics and Voice over Internet Protocol (VoIP). International direct dialling was introduced in the 1970s, so calls can be dialed by country code without an operator.
The BT Smart Hub is a family of wireless residential gateway router modems distributed by BT for use with their own products and services and those of wholesale resellers but not with other Internet services. Since v 5 Home/Smart Hubs support the faster Wi-Fi 802.11ac standard, in addition to the 802.11b/g/n standards. All models of the Home Hub prior to Home Hub 3 support VoIP Internet telephony via BT's Broadband Talk service, and are compatible with DECT telephone handsets. Since the Home Hub 4, all models have been dual band.
BT Wholesale and Ventures was a division of United Kingdom telecommunications company BT Group that provided voice, broadband, data, hosted communication, managed network and IT services to communications providers (CPs) in Great Britain. It was merged with BT's Business and Public Sector division to form BT Enterprise in October 2018.
The 3GPP has defined the Voice Call Continuity (VCC) specifications in order to describe how a voice call can be persisted, as a mobile phone moves between circuit switched and packet switched radio domains.
The United Kingdom has been involved with the Internet throughout its origins and development. The telecommunications infrastructure in the United Kingdom provides Internet access to homes and businesses mainly through fibre, cable, mobile and fixed wireless networks, with the UK's 140-year-old copper network, maintained by Openreach, set to be withdrawn by December 2025.
As in many other countries, the United Kingdom is retiring its part of the global circuit-switched public switched telephone network.
