Landline in the context of "Public switched telephone network"

Orange S.A. (French: [ɔʁɑ̃ʒ] ; formerly France Télécom, stylised as france telecom) is a French multinational telecommunications corporation founded in 1988 and headquartered in Issy-les-Moulineaux, near Paris.

Orange has been the corporation's main brand for mobile, landline, internet and Internet Protocol television (IPTV) services since 2006. It traces its origins back to Hutchison Whampoa acquiring a controlling stake in Microtel Communications in 1994 in the United Kingdom. Microtel Communications became a subsidiary of Mannesmann in 1999 and then was acquired by France Télécom in 2000. The former French public telecoms monopoly thus became internationalized following this takeover and has pursued an expansionist policy since. The group now operates in many countries in Europe, Africa and in the French West Indies. Since February 2012, as a result of the company's decision to transfer its fixed-line telephony operations to its Orange brand, all offers marketed by France Télécom are Orange-branded; and on July 1, 2013, France Télécom itself was rebranded Orange S.A.. In 2019, Orange S.A. employed nearly 148,000 people worldwide, including 88,000 in France.

Short Message Service (SMS) is a text messaging service component of most telephone, Internet and mobile device systems. It uses standardized communication protocols that let mobile phones exchange short text messages, typically transmitted over cellular networks.

Developed as part of the GSM standards, and based on the SS7 signalling protocol, SMS rolled out on digital cellular networks starting in 1993 and was originally intended for customers to receive alerts from their carrier/operator. The service allows users to send and receive text messages of up to 160 characters, originally to and from GSM phones and later also CDMA and Digital AMPS; it has since been defined and supported on newer networks, including present-day 5G ones. Using SMS gateways, messages can be transmitted over the Internet through an SMSC, allowing communication to computers, fixed landlines, and satellite. MMS was later introduced as an upgrade to SMS with "picture messaging" capabilities.

PT Telekomunikasi Indonesia (Persero) Tbk (lit. 'Telecommunications Indonesia State-owned Public Limited Company') officially shortened into PT Telkom Indonesia (Persero) Tbk, also simply known as Telkom, is an Indonesian multinational telecommunications conglomerate with its corporate headquarters in Bandung and its operational headquarters in the Telkom Landmark Complex in Jakarta. Telkom is listed on the Indonesia Stock Exchange and has a secondary listing on the New York Stock Exchange—the only Indonesian company, currently listed there (but not the first—the first was Indosat, which delisted from the exchange in 2013). The government of Indonesia owns over half of the Telkom's outstanding shares.

Telkom has major business lines in fixed line telephony, internet, and data communications. It is operated as the parent company of the Telkom Group, which is engaged in a broad range of businesses which consist of telecommunication, multimedia, property, and financial services. Since 2008, Telkom Indonesia began changing its business, focusing on infrastructure, systems, organization and human resources, and the corporate culture, in order to face the rising competition.

Síminn hf. (Icelandic pronunciation: [ˈsiːmɪn], lit. 'The Telephone'; also known as Iceland Telecom Ltd.), previously named Landssíminn ([ˈlan(t)sˌsiːmɪn], lit. 'The National Telephone'), is an Icelandic telecommunications company. It offers communication services for both private and corporate clients, including mobile (4G/5G), landline, internet, IPTV, streaming services and television production.

As a former incumbent state-owned telecom, it was split from Iceland Post (Íslandspóstur) in 1998 and later privatised in 2005. In 2007 its infrastructure arm was split off as Míla, sold off in 2022. Síminn is listed on the Icelandic stock exchange.

In times of crisis and natural disasters, amateur radio is often used as a means of emergency communication when wireline, cell phones and other conventional means of communications fail.

Unlike commercial systems, amateur radio is usually independent of terrestrial facilities that can fail. It is dispersed throughout a community without "choke points" such as cellular telephone sites that can be overloaded.

A telephone line or telephone circuit (or just line or circuit industrywide) is a single-user circuit on a telephone communication system. It is designed to reproduce speech of a quality that is understandable. It is the physical wire or other signaling medium connecting the user's telephone apparatus to the telecommunications network, and usually also implies a single telephone number for billing purposes reserved for that user.

Telephone lines are used to deliver consistent landline telephone service and digital subscriber line (DSL) phone cable service to the premises. Telephone overhead lines are connected to the public switched telephone network. The voltage at a subscriber's network interface is typically 48 V between the ring and tip wires, with tip near ground and ring at –48 V.