q-Tech QSW-9010, Руководство по настройке CLI

Страница: 8 / 101

User Manual
1. GPON properties 8
www.qtech.ru
1. GPON PROPERTIES
GPON (Gigabit Passive Optical Network) is a PON (Passive Optical Network) technology, is a series of
ITU-T G.984.x&G.988 standards Gigabit PON. GPON access is used to support higher bandwidth.
1.1. Introduction
GPON Technology highlight:

Longer transmission distances: using optical fiber transmission, the access layer coverage
radius of 20km, the maximum logical distance 60km.

Higher bandwidth: theoretical maximum downlink bit rate single user rate of 2.5Gbit / s,
maximum uplink rate 1.25Gbit / s.

QoS (Quality of Service) guarantee full service access: bearer GEM (GPON Encapsulation
Mode) frames, quality of service well.

PLC characteristics: Help to save fiber resources, reduce the number of central office
optical equipment, and reduce operating and maintenance costs.
1.2. Reference Standards and Protocols

ITU-T G.984.1: General characteristics, mainly about the basic properties and the main
GPON technology protection.

ITU-T G.984.2: Physical Media Dependent (PMD) layer specification, mainly about the
GPON physical layer parameters, such as the various physical parameters of the optical
module, comprising of Tx power, Rx sensitivity, overload optical power. Also it defines
different levels of optical power budget, such as the most common Class B +.

ITU-T G.984.3: Transmission convergence layer specification, mainly about the GPON TC
layer protocol, comprising of the principle frame structure of uplink and downlink of
GPON.

ITU-T G.984.4: ONU management and control interface specification, focuses on GPON
management and maintenance protocols, including OAM, PLOAM and OMCI protocol.

ITU-T G.984.5: Enhancement band, focuses on the wavelength planning for the next
generation PON reserved for the corresponding band.

ITU-T G.984.6: Reach extension, introduces several Long Reach PON solutions.

ITU-T G.988: ONU management and control interface (OMCI) specification.