public switched telephone network (pstn)
91BT Group — Infobox Company company name = BT Group plc company company type = Public (lse|BT.A NYSE|BT) foundation = 1 October 1981 (as British Telecommunications) location = London, England, UK key people = Sir Michael Rake, Chairman Ian Livingston, Chief… …
92IP PBX — An IP (Internet Protocol) PBX (Private branch exchange) is a business telephone system designed to deliver voice over a data network and interoperate with the normal Public Switched Telephone Network (PSTN). VoIP (Voice over Internet Protocol)… …
93Radio — is the transmission of signals, by modulation of electromagnetic waves with frequencies below those of visible light.Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of… …
94Echo cancellation — The term echo cancellation is used in telephony to describe the process of removing echo from a voice communication in order to improve voice quality on a telephone call. In addition to improving subjective quality, this process increases the… …
95СТО НП АВОК 8.2-2008: Комплекс систем интеллектуализации малоэтажных и коттеджных зданий — Терминология СТО НП АВОК 8.2 2008: Комплекс систем интеллектуализации малоэтажных и коттеджных зданий: 3.19 IP телефония : Вид услуги телефонной связи, который позволяет при наличии доступа к Интернету или локальным ресурсам компании провайдера… …
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96E.164 — is an ITU T recommendation that defines the international public telecommunication numbering plan used in the PSTN and some other data networks. It also defines the format of telephone numbers. E.164 numbers can have a maximum of fifteen digits… …
97Truphone — Infobox generic color = light blue name = Quick facts| img1 = Truphone logo.jpg width1 = 220px cap1 = Internet telephony on mobile phones| hdr1 = Truphone lbl1 = Developed by: row1 = Software Cellular Network Ltd lbl2 = Functionality: row2 =… …
98Signaling (telecommunications) — In telecommunication, signaling (signalling in British spelling) has the following meanings: the use of signals for controlling communications the information exchange concerning the establishment and control of a telecommunication circuit and… …
99Routing — This article is about routing in networks. For other uses, see Routing (disambiguation). Routing is the process of selecting paths in a network along which to send network traffic. Routing is performed for many kinds of networks, including the… …
100Telkom SA — Infobox Company company name = Telkom SA, Ltd. company company type = Public company slogan = Touch Tomorrow. foundation = Johannesburg, South Africa, 1991 location = Pretoria, South Africa key people = Reuben J September, CEO num employees =… …
