GPON

Gpon Equipment overview

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Gpon Equipment overview:

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Huawei OLT:

OLT is one of the major gopn equipment. There are three types of frame. The large frame (SmartAX MA5600T) has 16 service slots while the middle frame (which named MA5603T) has 6 service slots and the small frame (which named MA5608T) has 2 service slots. The hardware and software are all compatible between MA5600T, MA5603T and MA5608T.

Huawei MA5600T OLT Gpon Equipment overview
Huawei MA5600T OLT Gpon Equipment overview

Huawei PON SFP Module:

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GPON Technology Diagram Overview

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GPON Technology Diagram: Gigabit Passive Optical Network (GPON) is a high bandwidth shared fiber access technology. GPON is a point-to-multipoint access mechanism. Its main characteristic is the use of passive splitters in the fiber distribution network, enabling one single feeding fiber from the provider’s central office to serve multiple homes and small businesses. [boxads] GPON … Read more

PON Principles

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PON Principles:

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(Almost) all PON types obey the same basic principles

OLT and ONU consist of

  • Layer 2 (Ethernet MAC, ATM adapter, etc.)
  • optical transceiver using different ls  for transmit and receive
  • optionally: Wavelength Division Multiplexer

Downstream transmission

  • OLT broadcasts data downstream to all ONUs in ODN
  • ONU captures data destined for its address, discards all other data
  • encryption needed to ensure privacy

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PON Types APON BPON GPON EPON WDM-PON

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PON Types: A passive optical network (PON) is a system, that brings optical fiber cabling and signals all or most of the way to the end user. Depending on where the PON terminates, the system can be described as fiber-to-the-curb (FTTC), fiber-to-the-building (FTTB), or fiber-to-the-home (FTTH).[boxads] A PON consists of an Optical Line Termination (OLT) … Read more

PON Architecture

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PON Architecture:

Like every other field, PON technology has its own terminology

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  • the CO head-end is called an OLT
  • ONUs are the CPE devices (sometimes called ONTs in ITU)
  • the entire fiber tree (incl. feeder, splitters, distribution fibers) is an ODN
  • all trees emanating from the same OLT form an OAN
  • downstream is from OLT to ONU (upstream is the opposite direction)

PON Architecture Diagram:

PON Architecture
PON Architecture

OLT (Optical line terminal)

OLT is a terminal equipment connected to the fiber backbone. It sends Ethernet data to the ONU, initiates and controls the ranging process, and records the ranging information. OLT allocates bandwidth to the ONU and controls the starting time and the transmission window size of the ONU transmission data.

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PON Advantages

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PON Advantages: Shared infrastructure translates to lower cost per customer  minimal number of optical transceivers  feeder fiber and transceiver costs divided by N customers  greenfield per-customer cost similar to UTP [boxads] Passive splitters translate to lower cost can be installed anywhere no power needed essentially unlimited MTBF Fiber data-rates can be upgraded as technology improves … Read more