A metropolitan area network (MAN) is a computer network that interconnects users with computer resources in a geographic region of the size of a metropolitan area. The term MAN is applied to the interconnection of local area networks (LANs) in a city into a single larger network which may then also offer efficient connection to a wide area network. The term is also used to describe the interconnection of several LANs in a metropolitan area through the use of point-to-point connections between them.
Free-space optical communication (FSO) is an optical communication technology that uses light propagating in free space to wirelessly transmit data for telecommunications or computer networking. "Free space" means air, outer space, vacuum, or something similar. This contrasts with using solids such as optical fiber cable.
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.
A metropolitan-area Ethernet, Ethernet MAN, carrier Ethernet or metro Ethernet network is a metropolitan area network (MAN) that is based on Ethernet standards. It is commonly used to connect subscribers to a larger service network or for internet access. Businesses can also use metropolitan-area Ethernet to connect their own offices to each other.
Ciena Corporation is an American networking systems and software company based in Hanover, Maryland. The company has been described by The Baltimore Sun as the "world's biggest player in optical connectivity". The company reported revenues of $3.63 billion and more than 8,000 employees, as of October 2022. Gary Smith serves as president and chief executive officer (CEO).
The following outline is provided as an overview of and topical guide to telecommunication:
40 Gigabit Ethernet (40GbE) and 100 Gigabit Ethernet (100GbE) are groups of computer networking technologies for transmitting Ethernet frames at rates of 40 and 100 gigabits per second (Gbit/s), respectively. These technologies offer significantly higher speeds than 10 Gigabit Ethernet. The technology was first defined by the IEEE 802.3ba-2010 standard and later by the 802.3bg-2011, 802.3bj-2014, 802.3bm-2015, and 802.3cd-2018 standards. The first succeeding Terabit Ethernet specifications were approved in 2017.
RAD is a privately held corporation, headquartered in Tel Aviv, Israel that designs and manufacturers specialized networking equipment.
Circuit emulation service (CES) is a telecommunication technology used to send information over asynchronous data networks like ATM, Ethernet or MPLS, so that it is received error-free with constant delay, similar to a leased line.
Overture Networks was a company that designed, manufactured, and marketed networking and telecommunications equipment. It was "a leading developer of converged packet access platforms for Carrier Ethernet services." Overture was headquartered in Research Triangle Park (RTP), North Carolina and also maintained offices in Westford, MA and Bangalore, India.
Carrier Ethernet is a marketing term for extensions to Ethernet for communications service providers that utilize Ethernet technology in their networks.
The 10 Gbit/s Ethernet Passive Optical Network standard, better known as 10G-EPON allows computer network connections over telecommunication provider infrastructure. The standard supports two configurations: symmetric, operating at 10 Gbit/s data rate in both directions, and asymmetric, operating at 10 Gbit/s in the downstream direction and 1 Gbit/s in the upstream direction. It was ratified as IEEE 802.3av standard in 2009. EPON is a type of passive optical network, which is a point-to-multipoint network using passive fiber-optic splitters rather than powered devices for fan-out from hub to customers.
BATM Advanced Communications Ltd. is a technology company principally engaged in development, production and marketing of data and telecommunication products in the field of local and wide area networks, as well as the development, production and distribution of laboratory diagnostic equipment in the medical sector. The company is listed on the London Stock Exchange and is a constituent of the FTSE techMARK 100 Index.
ADVA Optical Networking SE was a European telecommunications vendor that provides network equipment for data, storage, voice and video services. It was founded in 1994 by Brian Protiva. On August 30, 2021, it was announced that ADVA and Adtran Holdings would be merging, continuing business under the name Adtran.
Orckit-Corrigent was an Israel-based supplier of telecommunications networking equipment and products that facilitated the delivery of Carrier Ethernet and TDM migration applications for telecommunication providers.
Comcast Business is a subsidiary of Comcast, which, through several iterations, has handled the sales, marketing, and delivery of internet, phone, and cable television to businesses. In 2012, Comcast Business grew by 34%, the fastest growth of any of Comcast's products in 2012, reaching $2.4 billion in revenue. In 2013, Comcast Business generated $3.2 billion in revenue, an increase of 26% over 2012 revenue.
NeoPhotonics Corporation is an American public corporation based in San Jose, California. It was founded in 1996. The company develops, manufactures and sells optoelectronic products that transmit, receive and switch high speed digital optical signals for communications networks, These products include transceivers, tunable lasers, high bandwidth receivers, optical semiconductors, photonic integrated circuits, and 100 gigabit per second and above modules." These are each "cost-effective components that handle massive amounts of data at very high speeds".
Ashwin Gumaste is an Indian computer engineer and institute chair professor at the department of computer science and engineering of the Indian Institute of Technology, Bombay. He is known for his work on Carrier Ethernet Switch routers—the largest technology transfer between any IIT and industry.
Inphi Corporation is an American company that produces 10G-800G high-speed analog and mixed-signal semiconductor components and optical subsystems to networking original equipment manufacturers (OEMs), optical module, cloud and telecom service providers. Its headquarters are located in Santa Clara, California. Inphi develops linear transimpedance amplifiers, modulator drivers, optical physical layer devices, coherent DSPs, and silicon photonic-based subsystems for long haul, metro, and data center applications. As of April 20, 2021, the company was acquired by Marvell Technology, Inc.
Tejas Networks is an optical, broadband and data networking products company based in India. The company designs develops and sells its products to telecom service providers, internet service providers, utilities, security and government entities in 75 countries. The company has built many IPs in multiple areas of telecom networking and has emerged as an exporter to other developing countries including Southeast Asia and Africa.
