GPON ONUs The Alcatel-Lucent GPON ONU products are subscriber/customer co-located edge

devices that use GPON technology to extend a fiber optic cable from a P-OLT shelf

at a CO to a subscriber residence, including single-family residences (SFU),

multi-dwelling residences (MDU) such as an apartment building, and small office

home office applications. The ONUs terminate the GPON physical and transmission

convergence layer and provide the specific service interworking function required at

the subscriber residence (for example, High Speed Interface, POTS, DS1 CES and

so on).

The Alcatel-Lucent GPON ONU products provide the following functions and

services:

• network demarcation for all services

• voice interworking function from the analog POTS lines to the VoIP/Ethernet

layers

• interworking functions between the GEM and Ethernet layers

• interworking functions between the PON optical overlay and the RF video

interface

• CES encapsulation of DS1/E1 using the MEF-8 packetization format for

transport across the layer 2 Ethernet PON

• mux and demux functions to the PON

• optical to electrical conversion

• located at subscriber residence

All Alcatel-Lucent GPON ONUs were developed using the following GPON ITU-T

standards:

• G.984.1 (GPON Service requirements)

• G.984.2 (GPON PMD layer)

• G.984.2 (GPON PMD layer) amendment 1

• G.984.3 (GPON TC Layer)

• G.984.3 (GPON TC Layer) amendment 1 and 2

• G.984.4 (GPON OMCI)

• G.984.4 (GPON OMCI) amendments 1 and 2

• G.988 (OMCI)

• OIG Implementers Guide

Indoor ONU The indoor ONU terminates services at the subscriber premises and is used for

subscribers living in single-family residences. The indoor ONU is suitable for

installation on a desktop or for attaching to an interior wall.

Note — As already stated in chapter “GPON Network Architecture”,

the term ONT (Optical Network Termination) is an implementation of

the more general used term ONU (Optical Network Unit). This

document uses the general term for all Optical Network devices