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Gigabit Passive Optical Network Tutorial

  • Gigabit Passive Optical Network Tutorial Fiber-Mart.com
  • Post on Thursday 05 March, 2015
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Fiber-Mart FTTX Solutions

Gigabit Passive Optical Network GPON Tutorial

 

Gigabit passive optical network (GPON) is based on the TU-TG.984.x standard for the new generations of broadband passive optical access. Compared with the other PON standards, GPON provides the unprecedented high bandwidth downlink rate of up to 2.5 Gbps, the asymmetric features better adapt to the broadband data services market. It provides the QoS full business protection, at the same time carries ATM cells and (or) GEM frame, the good service level, the ability to support QoS assurance and service access. Carrying GEM frame, TDM traffic can be mapped to the GEM frame, 8 kHz using a standard frame able to support TDM services. As a carrier-grade technology standards, GPON also provides access network level protection mechanism and full OAM functions. GPON is widely deployed in FTTH networks. It can develop into two directions which is 10G-PON (or XG-PON) and WDM-PON.

 

Fundamentals of GPON Infrastructure

 

GPON_Infrastructure
 

Optical Line Terminal (OLT)


Acts as the central aggregation element Located in the Core Data Center Replaces multiple L2 switches Can aggregate thousands of end users

 

Passive Optical Network (PON)


Completely passive infrastructure Single fiber carries multiple wavelengths 2.48 Gbps downstream 1.24 Gbps upstream Serve remote bldgs up to 20 km

 

Passive Optical Splitter


Rack Mount or Cassette versions Splits single fiber up to 32 ways Can be located in the IDF/TR, under a raised floor, in a ceiling zone box, or in a manhole The further the splitter is extended to the desk, the greater the savings in fiber infrastructure

Optical Network Terminals (ONT)


Terminates the fiber at the end user Provides Data, VoIP, IP Video services Some models also provide native POTS Desktop and MultiDesk Unit models

Completely Single Mode Fiber Solution


Multimode fiber will not support the 20–30km reach Multimode cannot support multiple wavelengths for upstream/downstream traffic on single filament Single mode supports over 69 Tbps of throughput, making it a ‘future proof‘ transport medium

Benefits of Fiber Plant vs. Copper:


Not susceptible to EMI Unmatched security from tampering and intrusion Lower material and installation cost Smaller cable footprint than a copper infrastructure

Tips:


A single strand of fiber (with a 1x32 splitter) can provided up to 128 GbE end user ports GPON connections are all simplex SC-APC connectors Splitters are completely passive, and able to be placed in nearly any accessible space (floor, ceiling box, closet, manholes) Communications closets (IDF/TR) become passive spaces for the fiber splitter, or simply a fiber pass thru.

Benefits of Optical LANs


Up to 70% less Equipment CapEx Up to 50% less Infrastructure CapEx Up to 80% less power consumption Up to 90% less space utilization 5-9s reliability, physical redundancy and provisionable QoS Tangible contributions to environmental green initiatives Future proof fiber optic LAN infrastructure Year-over-year lower total cost of ownership (lower OpEx) Graceful migration to a fully converged IP network

Design Considerations for GPON

 

Structured Cabling Solutions

 

Three Networks for Three Services: Today's Voice, Data & Video LAN

Voice/DATA/Video LAN

PON Based Service Delivery: Only One Network for All Services

PON Based Service

1. Analog & VoIP Support


GPON was designed to carry both Analog POTS and Data services:
VoIP services are carried as a high-priority data service GPON enables Analog Voice to be converted into VoIP directly within the ONT Both VoIP and Analog POTS are carried thru GPON network identically
Analog and VoIP

2. RF Video Distribution Support


Benefits of RF Video Overlay:
Carriage of RF signals is transparent to GPON Transparent to head-end solution Multiple vendors for head-end equipment GPON provides remote ON/OFF control at end user

RF Video Distribution

Side-By-Side Comparison

 

Traditional LAN Gigabit Passive Optical Network
Traditional LAN Gigabit Passive Optical Network

Secure PON Overview

 

LAN Protection Methods for SIPR Applications:
NSA Approved Desktop Encryption Devices Hardened Protected Distribution Systems (PDS) Smart PDS
 

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Email for [email protected]

 

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