"Fiber broadband" redirects here. For the overhead version of data and internet transmission, see Broadband over power lines.
FTTB, FTTC, FTTD, FTTH, FTTK, FTTN, and FTTP all redirect here. For airports with those ICAO codes, see List of airports in Chad.
A schematic illustrating how FTTX (Node, Curb, Building, Home) architectures vary with regard to the distance between the optical fiber and the end user. The building on the left is the central office; the building on the right is one of the buildings served by the central office. Dotted rectangles represent separate living or office spaces within the same building.
Fiber to the x (FTTX; also spelled "fibre") or fiber in the loop is a generic term for any broadband network architecture using optical fiber to provide all or part of the local loop used for last miletelecommunications. As fiber optic cables are able to carry much more data than copper cables, especially over long distances, copper telephone networks built in the 20th century are being replaced by fiber.[1]
FTTX is a generalization for several configurations of fiber deployment, arranged into two groups: FTTP/FTTH/FTTB (fiber laid all the way to the premises/home/building) and FTTC/N (fiber laid to the cabinet/node, with copper wires completing the connection).
Residential areas already served by balanced pair distribution plant call for a trade-off between cost and capacity. The closer the fiber head, the higher the cost of construction and the higher the channel capacity. In places not served by metallic facilities, little cost is saved by not running fiber to the home.
Fiber to the x is the key method used to drive next-generation access (NGA), which describes a significant upgrade to the broadband available by making a step change in speed and quality of the service. This is typically thought of as asymmetrical with a download speed of 24Mbit/s plus and a fast upload speed.[2]Ofcom have defined super-fast broadband as "broadband products that provide a maximum download speed that is greater than 24Mbit/s–this threshold is commonly considered to be the maximum speed that can be supported on current generation (copper-based) networks."[3]
FTTP (fiber-to-the-premises): This term is used either as a blanket term for both FTTH and FTTB, or where the fiber network includes both homes and small businesses
FTTH (fiber-to-the-home): Fiber reaches the boundary of the living space, such as a box on the outside wall of a home. Passive optical networks and point-to-point Ethernet are architectures that are capable of delivering triple-play services over FTTH networks directly from an operator's central office.[4][5] Typically providing between 1 and 10Gbit/s
FTTB (fiber-to-the-building, -business, or -basement): Fiber reaches the boundary of the building, such as the basement in a multi-dwelling unit, with the final connection to the individual living space being made via alternative means, similar to the curb or pole technologies
FTTD can mean two different things:
(fiber-to-the-desktop or -desk): In an office, fiber connection is installed from the main computer room to a desk or fiber media converter near the user's desk
(fiber-to-the-door): Fiber reaches outside the flat
FTTR can mean three different things:
(fiber-to-the-radio): Fiber runs to the transceivers of base stations
(fiber-to-the-router): Fiber connection is installed from the router to the ISP's fiber network
(fiber-to-the-room): Fiber connection is extended from the router to each room in the home
FTTO (fiber-to-the-office): Fiber connection is installed from the main computer room/core switch to a special mini-switch (called FTTO Switch) located at the user's workstation or service points. This mini-switch provides Ethernet services to end user devices via standard twisted pair patch cords. The switches are decentralised and located all over the building, but managed from one central point
FTTF can mean five different things:
(fiber-to-the-factory): fiber runs to factory buildings
(fiber-to-the-farm): fiber runs to agricultural farms
(fiber-to-the-feeder): a synonym of FTTN
(fiber-to-the-floor): fiber reaches a junction box at a floor of a building
(fiber-to-the-frontage): This is very similar to FTTB. In a fiber to the front yard scenario, each fiber node serves a single subscriber. This allows for multi-gigabit speeds using XG-fast technology. The fiber node may be reverse-powered by the subscriber modem[6]
FTTM can mean four different things:
(fiber-to-the-machine): In a factory, fiber runs to machines
(fiber-to-the-mast): Fiber runs to wireless masts
(fiber-to-the-mobile): Fiber runs to base stations
(fiber-to-the-multi-dwelling-unit): FTTP to apartment buildings
FTTT can mean three different things:
(fiber-to-the-terminal): In an office, fiber runs to desktop equipment
(fiber-to-the-tower): Fiber reaches base stations
(fiber-to-the-tent): For example, at hacker camps such as BornHack in Denmark.[7]
FTTW (fiber-to-the-wall or -workgroup): In an office, fiber runs to small switches near a group of users
FTTA can mean two different things:
(fiber-to-the-amplifier): Fiber runs to street cabinets
(fiber-to-the-antenna): Fiber runs up antenna towers
FTTCS (fiber-to-the-cell-site): fiber reaches the base station site
FTTE / FTTZ (fiber-to-the-telecom-enclosure or fiber-to-the-zone): is a form of structured cabling typically used in enterprise local area networks, where fiber is used to link the main computer equipment room to an enclosure close to the desk or workstation. FTTE and FTTZ are not considered part of the FTTX group of technologies, despite the similarity in name.[8]
FTTdp (fiber-to-the-distribution-point): This is very similar to FTTC / FTTN but is one-step closer again, moving the end of the fiber to within meters of the boundary of the customers premises in the last possible junction box, known as the "distribution point". This allows for near-gigabit speeds[9]
FTTL (fiber-to-the-loop): general term
FTTN / FTTLA (fiber-to-the-node, -neighborhood, or -last-amplifier): Fiber is terminated in a street cabinet, possibly miles away from the customer premises, with the final connections being copper. FTTN is often an interim step toward full FTTH (fiber-to-the-home) and is typically used to deliver 'advanced' triple-play telecommunications services
FTTC / FTTK (fiber-to-the-curb/kerb, -closet, or -cabinet): This is very similar to FTTN, but the street cabinet or pole is closer to the user's premises, typically within 300m (1,000ft), within range for high-bandwidth copper technologies such as wired Ethernet or IEEE 1901power line networking and wireless Wi-Fi technology. FTTC is occasionally ambiguously called FTTP (fiber-to-the-pole), leading to confusion with the distinct fiber-to-the-premises system. Typically providing up to 100Mbit/s
FTTS can mean three different things:
(fiber-to-the-screen or -seat): On an airplane, fiber reaches the IFE screens
(fiber-to-the-street): The customer is connected using copper to the fiber passing near the building, up to 200m (700ft) away. This is a compromise between FTTB and FTTC. Typically providing up to 500Mbit/s
(fiber-to-the-subscriber): This is a synonym for FTTP
To promote consistency, especially when comparing FTTH penetration rates between countries, the three FTTH Councils of Europe, North America, and Asia-Pacific agreed upon definitions for FTTH and FTTB in 2006,[10] with an update in 2009,[11] 2011[12] and another in 2015.[13] The FTTH Councils do not have formal definitions for FTTC and FTTN.
Benefits
While fiber optic cables can carry data at high speeds over long distances, copper cables used in traditional telephone lines and ADSL cannot. For example, the common form of Gigabit Ethernet (1Gbit/s) runs over relatively economical category 5e, category 6 or 6A unshielded twisted-pair copper cabling but only to 100m (300ft). However, 1Gbit/sEthernet over fiber can easily reach tens of kilometers. Therefore, FTTP has been selected by every major communications provider in the world to carry data over long 1Gbit/s symmetrical connections directly to consumer homes. FTTP configurations that bring fiber directly into the building can offer the highest speeds since the remaining segments can use standard Ethernet or coaxial cable.
Fiber is often said to be "future-proof" because the data rate of the connection is usually limited by the terminal equipment rather than the fiber, permitting substantial speed improvements by equipment upgrades before the fiber itself must be upgraded. Still, the type and length of employed fibers chosen, e.g. multimode vs. single-mode, are critical for applicability for future connections of over 1Gbit/s.
FTTC (where fiber transitions to copper in a street cabinet) is generally too far from the users for standard Ethernet configurations over existing copper cabling. They generally use very-high-bit-rate digital subscriber line (VDSL) at downstream rates of 80Mbit/s, but this falls extremely quickly when the distance exceeds 100m (300ft).
Fiber to the premises
Fiber to the premises (FTTP) is a form of fiber-optic communication delivery in which an optical fiber is run in an optical distribution network from the central office all the way to the premises occupied by the subscriber. The term "FTTP" has become ambiguous and may also refer to FTTC where the fiber terminates at a utility pole without reaching the premises.
Fiber-optic cable being pulled underneath the streets of New York CityAn optical fiber jack (cover removed) in a residence with FTTH service
Fiber to the premises can be categorized according to where the optical fiber ends:
FTTH (fiber-to-the-home) is a form of fiber-optic communication delivery that reaches one living or working space. The fiber extends from the central office to the subscriber's living or working space.[12] Once at the subscriber's living or working space, the signal may be conveyed throughout the space using any means, including twisted pair, coaxial cable, wireless, power line communication, or optical fiber.
FTTB (fiber-to-the-building or -basement) is a form of fiber-optic communication delivery that necessarily applies only to those properties that contain multiple living or working spaces. The optical fiber terminates before actually reaching the subscribers living or working space itself, but does extend to the property containing that living or working space. The signal is conveyed the final distance using any non-optical means, including twisted pair, coaxial cable, wireless, or power line communication.[12]
An apartment building may provide an example of the distinction between FTTH and FTTB. If a fiber is run to a panel inside each subscriber's apartment unit, it is FTTH. If instead, the fiber goes only as far as the apartment building's shared electrical room (either only to the ground floor or to each floor), it is FTTB.
Fibre-to-the-home cable.
This cable is outdoor-grade. Approximate diameters: Outer sheath: 5mm, outer white paper wrapper: ⌀2.5mm, inner white plastic sheath: ⌀890μm, blue sheath: ⌀250μm, optical fiber: ⌀150μm
Fiber to the curb/cabinet/node
Inside an FTTN or FTTC fiber cabinet. The left side contains the fiber and a DSLAM, and the right side contains the copper and punch down blocks for a form of DSL such as VDSL
Fiber to the curb/cabinet (FTTC) is a telecommunications system based on fiber-optic cables run to a platform that serves several customers. Each of these customers has a connection to this platform via coaxial cable or twisted pair. The "curb" is an abstraction and can just as easily mean a pole-mounted device or communications closet or shed. Typically any system terminating fiber within 300m (1,000ft) of the customer premises equipment would be described as FTTC.[15]
Fiber to the node or neighborhood (FTTN), sometimes identified with and sometimes distinguished from fiber to the cabinet (FTTC),[16] is a telecommunication architecture based on fiber-optic cables run to a cabinet serving a neighborhood. Customers typically connect to this cabinet using traditional coaxial cable or twisted pair wiring. The area served by the cabinet is usually less than one mile in radius and can contain several hundred customers.
FTTN allows delivery of broadband services such as high-speed internet. High-speed communications protocols such as broadband cable access (typically DOCSIS) or some form of digital subscriber line (DSL) are used between the cabinet and the customers. Data rates vary according to the exact protocol used and according to how close the customer is to the cabinet.
Unlike FTTP, FTTN often uses existing coaxial or twisted-pair infrastructure to provide last mile service and is thus less costly to deploy. In the long term, however, its bandwidth potential is limited relative to implementations that bring the fiber still closer to the subscriber.
A variant of this technique for cable television providers is used in a hybrid fiber-coaxial (HFC) system. It is sometimes given the acronym FTTLA (fiber-to-the-last-amplifier) when it replaces analog amplifiers up to the last one before the customer (or neighborhood of customers).
FTTC allows delivery of broadband services such as high-speed internet. Usually, existing wire is used with communications protocols such as broadband cable access (typically DOCSIS) or some form of DSL connecting the curb/cabinet and the customers. In these protocols, the data rates vary according to the exact protocol used and according to how close the customer is to the cabinet.
Where it is feasible to run new cable, both fiber and copper Ethernet are capable of connecting the "curb" with a full 100Mbit/s or 1Gbit/s connection. Even using relatively cheap outdoor category 5 copper over hundreds of meters, all Ethernet protocols including power over Ethernet (PoE) are supported[citation needed]. Most fixed wireless technologies rely on PoE, including Motorola Canopy, which has low-power radios capable of running on a 12VDC power supply fed over several tens of meters of cable.
Power line networking deployments also rely on FTTC. Using the IEEE P1901 protocol (or its predecessor HomePlug AV) existing electric service cables move up to 1Gbit/s from the curb/pole/cabinet into every AC electrical outlet in the home—coverage equivalent to a robust Wi-Fi implementation, with the added advantage of a single cable for power and data.
By avoiding new cable and its cost and liabilities, FTTC costs less to deploy. However, it also has historically had lower bandwidth potential than FTTP. In practice, the relative advantage of fiber depends on the bandwidth available for backhaul, usage-based billing restrictions that prevent full use of last-mile capabilities, and customer premises equipment and maintenance restrictions, and the cost of running fiber that can vary widely with geography and building type.
In the United States and Canada, the largest deployment of FTTC was carried out by BellSouth Telecommunications. With the acquisition of BellSouth by AT&T, deployment of FTTC will end. Future deployments will be based on either FTTN or FTTP. Existing FTTC plant may be removed and replaced with FTTP.[17]Verizon, meanwhile, announced in March 2010 they were winding down Verizon FiOS expansion, concentrating on completing their network in areas that already had FiOS franchises but were not deploying to new areas,[18] suggesting that FTTH was uneconomic beyond these areas.
Verizon also announced (at CES 2010) its entry into the smart home and power utility data management arenas, indicating it was considering using P1901-based FTTC or some other existing-wire approach to reach into homes, and access additional revenues from the secure AES-128 bandwidth required for advanced metering infrastructure. However, the largest 1Gbit/s deployment in the United States, in Chattanooga, Tennessee, despite being conducted by power utility EPB,[19] was FTTH rather than FTTC, reaching every subscriber in a 600-square-mile area. Monthly pricing of US$350 reflected this generally high cost of deployment. However, Chattanooga EPB has reduced the monthly pricing to US$70/month.[20]
Historically, both telephone and cable companies avoided hybrid networks using several different modes of transport from their point of presence into customer premises. The increased competitive cost pressure, availability of three different existing wire solutions, smart grid deployment requirements (as in Chattanooga), and better hybrid networking tools (with major vendors like Alcatel-Lucent and Qualcomm Atheros, and Wi-Fi solutions for edge networks, IEEE 1905 and IEEE 802.21 protocol efforts and SNMP improvements) all make FTTC deployments more likely in areas uneconomic to serve with FTTP/FTTH. In effect FTTC serves as a halfway measure between fixed wireless and FTTH, with special advantages for smart appliances and electric vehicles that rely on PLC use already.
Since 2007, Italian access providers Fastweb,[21]Vodafone, and Wind participated in an initiative called Fiber for Italy, with the aim of creating a countrywide fiber-to-the-home network in Italy. The pilot taking place in the Italian capital, Rome, has seen symmetrical bandwidth of 100Mbit/s.[22] Telecom Italia, which refused to take part in the Fiber for Italy initiative, had an even more ambitious plan to bring fiber-to-the-home and fiber-to-the-business to 138 cities by 2018.[23]
By the end of December 2010, the total number of fiber-to-the-home enabled homes had passed 2.5million, with more than 348,000 subscribers.[23][clarification needed])
In September 2010, the European Commission published a new "Recommendation for Regulated Access to NGA Networks" along with a list of measures to promote the deployment of fast broadband and next-generation access networks.[24]
Portugal Telecom plans to complete its fiber-to-the-home nationwide roll out by 2020. Currently 200Mbit/s down, 100Mbit/s up costs €22 per month.[25]
Between September 2017 and March 2019, the number of European FTTH and FTTB subscribers increased by nearly 16%. By 2025, the total number of premises passed by FTTH and FTTB infrastructure is expected to reach 187million throughout Europe.[26]
Active Line Access is an evolving standard for the provision of services over FTTP networks in the United Kingdom proposed by the regulator Ofcom and developed by the Network Interoperability Consultative Committee.[28]
FTTS, FTTH and FTTB
Most FTTH deployments follow one of four primary architecture types: centralized split, distributed split, star architecture, or daisy-chaining. Fiber network developers choose architectures based on a variety of factors, such as the physical geography of the local environment, number of anticipated subscribers, and labor force skill. [29]
FTTN and FTTC
FTTC during installation in Germany
FTTN/C is seen as an interim step towards full FTTH and in many cases triple-play services delivered using this approach to provide up to around 100Mbit/s have been proven to grow subscriber numbers and ARPU considerably[30][31][32] FTTN/C is currently used by a number of operators, including AT&T in the United States, Germany's Deutsche Telekom, Greece's OTE, Swisscom, TIM in Italy, Proximus in Belgium, nbn™ in Australia, and Canadian operators Telus, Cogeco and Bell Canada.
Optical distribution networks
Direct fiber
The simplest optical distribution network architecture is direct fiber: each fiber leaving the central office goes to exactly one customer. These networks can support a lot of bandwidth, but they cost more because of the fiber and the equipment in the central office.[33]
Direct fiber is generally favored by new entrants and competitive operators. A benefit is that no layer 2 networking technologies are excluded, whether passive optical network (PON), active optical network (AON), or other. Any form of regulatory remedy is possible using this topology.[34]
Shared fiber
More commonly, each fiber leaving the central office is actually shared by many customers. It is not until such a fiber gets relatively close to the customers that it is split into individual customer-specific fibers. AONs and PONs both achieve this split.
Active optical network
Comparison showing how a typical AON (a star network capable of multicasting) handles downstream traffic differently from a typical PON (a star network having multiple splitters housed in the same cabinet)
AONs rely on electrically powered network equipment to distribute the signal, such as a switch or router. Normally, signals need an optical-electrical-optical transformation in the AON. Each signal leaving the central office is directed only to the customer for whom it is intended.
Incoming signals from the customers avoid colliding at the intersection because the powered equipment there provides buffering. Active Ethernet (a type of Ethernet in the first mile) is a common AON, which uses optical Ethernet switches to distribute the signal, incorporating the customers' premises and the central office into a large switched Ethernet network. Ethernet in the first mile deployments follow a point to point or star network topology and are often based on Fast Ethernet speeds of up to 100Mbit/s.[35]
Such networks are identical to Ethernet computer networks used in businesses and academic institutions, except that their purpose is to connect homes and buildings to a central office rather than to connect computers and printers within a location. Each switching cabinet can handle up to 1,000 customers, although 400–500 is more typical.
A passive optical network (PON) is a point-to-multipoint FTTP network architecture in which unpowered optical splitters are used to enable a single optical fiber to serve up to 128 customers. A PON reduces the fiber and central office equipment required compared with point-to-point architecture. Because of this, and because it needs no powered splitters or other active components from the moment it leaves the ISP's facilities until it reaches the customer, many ISPs prefer this technology.[36]
The downstream signal coming from the central office is broadcast to each customer premises sharing a fiber. Encryption is used to prevent eavesdropping. Upstream signals are combined using a multiple-access protocol, usually time-division multiple access (TDMA).
Ethernet point-to-point
Point-to-Point Protocol over Ethernet (PPPoE) is a common way of delivering triple- and quad-play (voice, video, data, and mobile) services over both fiber and hybrid fiber-coaxial (HFC) networks. Active PPPoE uses dedicated fiber from an operator's central office all the way to the subscribers' homes, while hybrid networks (often FTTN) use it to transport data via fiber to an intermediate point to ensure sufficiently high throughput speeds over last-mile copper connections.
This approach has become increasingly popular in recent years with telecoms service providers in both North America (AT&T, Telus, for example) and Europe's Fastweb, Telecom Italia, Telekom Austria and Deutsche Telekom, for example. Google has also looked into this approach, amongst others, as a way to deliver multiple services over open-access networks in the United States.[37]
Electrical network
Once on private property, the signal is typically converted into an electrical format.
The optical network terminal (ONT, an ITU-T term) or unit (ONU, an identical IEEE term) converts the optical signal into an electrical signal using thin film filter technology. These units require electrical power for their operation, so some providers connect them to backup batteries in case of power outages to ensure emergency access to telecommunications. The optical line terminations "range" the optical network terminals or units in order to provide TDMA time slot assignments for upstream communication.
For FTTH and for some forms of FTTB, it is common for the building's existing Ethernet, phone, and cable TV systems to connect directly to the optical network terminal or unit. If all three systems cannot directly reach the unit, it is possible to combine signals and transport them over a common medium such as Ethernet. Once closer to the end user, equipment such as a router or network interface controller can separate the signals and convert them into the appropriate protocol.
For FTTC and FTTN, the combined internet, video and telephone signal travels to the building over existing telephone or cable wiring until it reaches the end-user's living space, where a VDSL or DOCSIS modem converts data and video signals into Ethernet protocol, which is sent over the end-user's category 5 cable.
Digital subscriber line is a family of technologies that are used to transmit digital data over telephone lines. In telecommunications marketing, the term DSL is widely understood to mean asymmetric digital subscriber line (ADSL), the most commonly installed DSL technology, for Internet access.
A digital subscriber line access multiplexer is a network device, often located in telephone exchanges, that connects multiple customer digital subscriber line (DSL) interfaces to a high-speed digital communications channel using multiplexing techniques. Its cable internet (DOCSIS) counterpart is the cable modem termination system.
Internet access is a facility or service that provides connectivity for a computer, a computer network, or other network device to the Internet, and for individuals or organizations to access or use applications such as email and the World Wide Web. Internet access is offered for sale by an international hierarchy of Internet service providers (ISPs) using various networking technologies. At the retail level, many organizations, including municipal entities, also provide cost-free access to the general public.
A passive optical network (PON) is a fiber-optic telecommunications network that uses only unpowered devices to carry signals, as opposed to electronic equipment. In practice, PONs are typically used for the last mile between Internet service providers (ISP) and their customers. In this use, a PON has a point-to-multipoint topology in which an ISP uses a single device to serve many end-user sites using a system such as 10G-PON or GPON. In this one-to-many topology, a single fiber serving many sites branches into multiple fibers through a passive splitter, and those fibers can each serve multiple sites through further splitters. The light from the ISP is divided through the splitters to reach all the customer sites, and light from the customer sites is combined into the single fiber. Many fiber ISPs prefer this system.
TransACT is the trading name of TransACT Capital Communications, an Australian telecommunications company based in Canberra which provides broadband internet access, fixed telephony, cable television services, and mobile phone services in Canberra and a subset of these services in Queanbeyan, throughout South-east New South Wales and in Victoria.
In the field of telecommunications, the concept of triple play service refers to the provision of three essential services — high-speed broadband Internet access, television, and latency-sensitive telephone services — all delivered over a single broadband connection. This approach emphasizes the convergence of multiple services by a single supplier, aiming to enhance user convenience and streamline service delivery.
In telecommunications, cable Internet access, shortened to cable Internet, is a form of broadband internet access which uses the same infrastructure as cable television. Like digital subscriber line and fiber to the premises services, cable Internet access provides network edge connectivity from the Internet service provider to an end user. It is integrated into the cable television infrastructure analogously to DSL which uses the existing telephone network. Cable TV networks and telecommunications networks are the two predominant forms of residential Internet access. Recently, both have seen increased competition from fiber deployments, wireless, mobile networks and satellite internet access.
The Multimedia over Coax Alliance (MoCA) is an international standards consortium that publishes specifications for networking over coaxial cable. The technology was originally developed to distribute IP television in homes using existing cabling, but is now used as a general-purpose Ethernet link where it is inconvenient or undesirable to replace existing coaxial cable with optical fiber or twisted pair cabling.
The physical-layer specifications of the Ethernet family of computer network standards are published by the Institute of Electrical and Electronics Engineers (IEEE), which defines the electrical or optical properties and the transfer speed of the physical connection between a device and the network or between network devices. It is complemented by the MAC layer and the logical link layer. An implementation of a specific physical layer is commonly referred to as PHY.
Ethernet in the first mile (EFM) refers to using one of the Ethernet family of computer network technologies between a telecommunications company and a customer's premises. From the customer's point of view, it is their first mile, although from the access network's point of view it is known as the last mile.
The prevalent means of connecting to the Internet in Germany is DSL, introduced by Deutsche Telekom in 1999. Other technologies such as Cable, FTTH and FTTB (fiber), Satellite, UMTS/HSDPA (mobile) and LTE are available as alternatives.
Broadband Internet in Israel has been available since the late 1990s in theory, but it only became practically accessible to most customers in 2001. By 2008, Israel had become one of the few countries with developed broadband capabilities across two types of infrastructure—cable and DSL—reaching over 95% of the population. Actual broadband market penetration stands at 77%, ranked 7th in the world. In 2010, Israel was ranked 26th in The Economist's Digital Economy Rankings. In 2022, Israel was ranked first for digital quality of life by Surfshark.
In Romania, there are 18.8 million connections to the Internet. Romania's country code is .ro. The .eu domain is also used, as it is shared with other European Union member states. There were over 600 000 domains registered under .ro at the end of 2012.
A video-ready access device (VRAD) provides digital subscriber line access and high-definition television programming to customers subscribed to IPTV services such as AT&T's U-verse, Bell Canada's Bell Fibe TV, Claro Puerto Rico's Claro TV, and Telus's Optik TV. VRAD equipment manufactured by Alcatel-Lucent can be configured to support between 48 and 864 lines per box. The VRAD boxes are composed of circuit boards providing service, fed by fiber-optic cable.
10G-PON is a 2010 computer networking standard for data links, capable of delivering shared Internet access rates up to 10 Gbit/s over dark fiber. This is the ITU-T's next-generation standard following on from GPON or gigabit-capable PON. Optical fibre is shared by many subscribers in a network known as FTTx in a way that centralises most of the telecommunications equipment, often displacing copper phone lines that connect premises to the phone exchange. Passive optical network (PON) architecture has become a cost-effective way to meet performance demands in access networks, and sometimes also in large optical local networks for fibre-to-the-desk.
The National Broadband Network (NBN) is an Australian national wholesale open-access data network. It includes wired and radio communication components rolled out and operated by NBN Co, a government-owned corporation. Internet service providers, known under NBN as retail service providers or RSPs, contract with NBN to access the data network and sell fixed Internet access to end users.
EPON Protocol over Coax, or EPoC, refers to the transparent extension of an Ethernet passive optical network (EPON) over a cable operator's hybrid fiber-coax (HFC) network. From the service provider's perspective the use of the coax portion of the network is transparent to EPON protocol operation in the optical line terminal (OLT) thereby creating a unified scheduling, management, and quality of service (QoS) environment that includes both the optical and coax portions of the network. The IEEE 802.3 Ethernet Working Group initiated a standards process with the creation of an EPoC Study Group in November 2011. EPoC adds to the family of IEEE 802.3 Ethernet in the First Mile (EFM) standards.
Physical media refers to the physical materials that are used to store or transmit information in data communications. These physical media are generally physical objects made of materials such as copper or glass. They can be touched and felt, and have physical properties such as weight and color. For a number of years, copper and glass were the only media used in computer networking.
G.fast is a digital subscriber line (DSL) protocol standard for local loops shorter than 500 meters, with performance targets between 100 Mbit/s and 1 Gbit/s, depending on loop length. High speeds are only achieved over very short loops. Although G.fast was initially designed for loops shorter than 250 meters, Sckipio in early 2015 demonstrated G.fast delivering speeds over 100 Mbit/s at nearly 500 meters and the EU announced a research project.
AT&T Internet is an AT&T brand of broadband internet service. Previously, AT&T Internet was branded as U-verse Internet and bundled with U-verse TV, which was spun off into the newly independent DirecTV in 2021. AT&T Internet plans powered by fiber-optic cable use the AT&T Fiber brand.
↑ EPB, website of a non-profit agency of the City of Chattanooga, established in 1935 to provide electric power to the greater Chattanooga area. Retrieved 12 July 2013.
↑ EPBFI, a website for EPB Fiber Optics. Retrieved 3 June 2014.
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