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Introduction to FTTx System

Posted By: technopediasite

The application of PON technology for providing broadband connectivity in the access network to homes, multiple-occupancy units, and small businesses commonly is called Fiber-to-the-x. This application is given the designation FTTx.

FTTx networks

FTTH networks belong to the family of FTTx transmission systems within the world of telecommunications. These networks, which are considered broadband, have the ability to transport large amounts of data and information at very high bit rates up to a point close to the end user.

The FTTx family comprises a set of technologies based on transport of digital signals through optical fiber as transmission medium. Different levels of scope, depending on the degree of optical fiber closer to the end user, which arise as a result of a greater or lesser price reduction of these systems.

All FTTx networks support a logical network configuration of tree, star, bus and ring, and all with the ever present possibility of using active components depending on the location of users or end customers.

Depending on the degree of penetration of FTTx, these networks can be classified into the following:

FTTB, fiber-to-the-business, refers to the deployment of optical fiber from a central office switch directly into an enterprise.

 FTTC, fiber-to-the-curb, describes running optical fiber cables from central office equipment to a communication switch located within 1000 ft (about 300 m) of a home or enterprise. Coaxial cable, twistedpair copper wires (e.g., for DSL), or some other transmission medium is used to connect the curbside equipment to customers in a building.

 FTTH, fiber-to-the-home, refers to the deployment of optical fiber from a central office switch directly into a home. The difference between FTTB and FTTH is that typically, businesses demand larger bandwidths over a greater part of the day than do home users. As a result, a network service provider can collect more revenues from FTTB networks and thus recover the installation costs sooner than for FTTH networks.

 FTTN, fiber-to-the-neighborhood, refers to a PON architecture in which optical fiber cables run to within 3000 ft (about 1 km) of homes and businesses being served by the network.

 FTTO, fiber-to-the-office, is analogous to FTTB in that an optical path is provided all the way to the premises of a business customer.

 FTTP, fiber-to-the-premises, has become the prevailing term that encompasses the various FTTx concepts. Thus FTTP architectures include FTTB and FTTH implementations. An FTTP network can use BPON, EPON, or GPON technology.

The use of fiber optics as medium of transmission to homes, and so, to end users, ensures network completely adapted to the needs of both current and future. The reuse of this physical infrastructure saves money over time despite strong outlay in initial phase, amortizing it in a short time.

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