Friday, May 3, 2013

What's FTTP, FTTH, FTTB, and FTTD? Fiber Optic Tutorial Series Four

FTTP means Fiber Towards The Premises that is one sort of fiber optic communication delivery where a optical fiber connection is directly go to the customers' premises. The P(premises)could be business, commercial, institutional along with other programs where fiber network connections are given to a campus, group of structures, or high density building having a centrally situated network procedures center. Another FTTx for example FTTN(fiber towards the node), FTTC(fiber towards the curb) still rely on copper wires for "last mile" (final connection) towards the customers' premises which contrasts with FTTP. FTTP could be further categorized into FTTH(fiber towards the home), FTTB(fiber towards the building), etc.

Network construction of FTTP

FTTP network could be split into two major parts: optical portion and electrical portion.

1. Optical portion

Optical area of the FTTP network accounts for transporting optical signal towards the electrical portion (electrical portion is situated within the customer's telecom room). Two fiber designs exists for the FTTP optical portion. They are direct fiber link and shared fiber link.

Direct fiber link may be the easiest form. One fiber can be used for directly hooking up the central office to 1 customer. This kind of connection offers the customer the greatest bandwidth but can also be probably the most costly configuration. Shared fiber link means just one fiber departing the service companies central office is shared by many people clients. Limited to the ultimate moment, the fiber is split up into many individual fiber to every customer.

You will find two major competing technologies for that shared fiber link configuration: active optical network (AON) and passive optical network (PON).

Active Optical Network (AON) is a lot a lot more like traditional Ethernet computer systems. It requires electric powered equipment to buffer and distribute the signal for example switches or hubs. Each signal departing the central office is routed simply to the client intended through the router or switch. However, signals in the clients are buffered through the router in the intersection staying away from colliding.

Passive Optical Network (PON) doesn't use any electric powered equipment to buffer and route the signals. Rather, the sunshine signal from central office is split and given to all clients, even individuals who aren't meant to. When the light signal gets to the electrical portion, where it's transformed into electrical signal through the ONT(see below), the ONT decides whether or not to keep or discard the signal based on its intended destination.

2. Electrical portion

Electrical area of the FTTP network receives optical signal and converts it to traditional electrical signal that is then given to desktop computer systems using a LAN copper wire network. This transforming system is known as an optical network termination(ONT). The building's phone systems, LAN and cable television system will be attached to the ONT.

Other FTTx

FTTB: Fiber Towards The Building. This really is in mention of the fiber optic cable, transporting network data, connected completely from an Isp to some customer's physical building.

FTTD: Fiber Towards The Desk.. FTTD signifies programs where fiber optic connections are distributed in the central office to individual work stations or computer systems in the structure, dwelling, or building.

FTTH: Fiber Towards The Home. FTTH signifies fiber network connections running in the central office to some residence, or really small multi-unit dwelling.

FTTN: Fiber towards the node. FTTN is also known as fiber towards the neighborhood or fiber towards the cabinet (FTTCab). It's a telecommunication architecture according to fiber-optic cables go to a cabinet serving an area.

FTTC: Fiber Towards The Curb. This is known as fibre towards the kerb (FTTK). It's a telecommunications system according to fiber-optic cables go to a platform that serves several clients. All these clients includes a link with this platform via coaxial cable or twisted pair.

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