ZyXEL Communications IES-1248-51 Guía de usuario descargar pdf (Pagina 45)

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Chapter 1 Introducing the IES-1248-51V

IES-1248-51V User’s Guide

1.5 Technical Reference

PON

A Passive Optical Network (PON) sends data through fiber optical cables from a

service provider to the premises. “Passive” means that no power is required once

the data, which is transmitted as light, enters the cables.

GEPON

GEPON also called EPON (Ethernet PON) is a PON compliant to the IEEE 802.3ah

standard. The fiber transmission speed can reach up to 1.25 Gbps. Up to 32 split

ratio simplifies network installation and maintenance.

ONU

In a PON, an Optical Network Unit (ONU) is a fiber optical modem that allows a

subscriber or client to receive very high-speed Internet access over an optical

network. It extends fiber optic cables from the service provider to the premises,

such as an office building or residence.

OLT

In a PON, an Optical Line Terminal (OLT) is placed at broadband service provider’s

central office, where it receives voice, video, and other data from the service pro-

vider’s networking servers. It then converts and transmits this data as light across

a fiber optical network, where it is received and translated on the opposite end by

one or more Optical Network Units (ONUs).

FTTx

Fiber-To-The-x (FTTx) refers to networking infrastructure that extends from a

service provider to the x, where x can one of many locations: Office (FTTO), Home

(FTTH), Desk (FTTD), Building (FTTB) or even Curb (FTTC), to name a few. In an

FTTO connection, the Optical Network Unit (ONU) is often placed inside the

building, whereas in FTTH or FTTC the fiber ends at an end-user’s house (or

somewhere nearby), or at a curb-side unit.

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