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

Upstream transmission

• ONUs share bandwidth using Time Division Multiple Access
• OLT manages the ONU timeslots
• ranging is performed to determine ONU-OLT propagation time

Additional functionality

• Physical Layer OAM
• Autodiscovery
• Dynamic Bandwidth Allocation

Shahed

Hi! I am Shahed Israr. I try to help GPON Technology users with their queries and provide them with relevant and accurate information to the best of my ability. My main goal is to assist and enhance GPON Technology user and help people find the answers they're looking for quickly and easily.

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