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Course Outline
Introduction to PON and Fiber Access Networks
- Understanding GPON and its role in FTTH/FTTx access networks.
- Comparing GPON, EPON, and XGS-PON regarding standards, bandwidth, and use cases.
- Key benefits: high bandwidth, long reach, passive infrastructure, and energy efficiency.
- Evolution roadmap: from GPON (G.984) to XGS-PON (G.9807.1), 25G PON, and 50G PON.
GPON Architecture and Components
- OLT (Optical Line Terminal): role, placement, shelf architecture, and uplink options.
- ONT/ONU (Optical Network Terminal/Unit): types, interfaces, and residential versus business models.
- ODN (Optical Distribution Network): fibers, splitters (PLC), FDH, closures, and connectors.
- Passive components: SC/APC and LC connectors, splice trays, and cable management.
Optical Principles and Link Budget
- Wavelength plans: downstream 1490 nm and upstream 1310 nm.
- Optical loss, attenuation, and power budget calculation for a PON link.
- Split ratio selection and its impact on reach and loss.
- Practical exercise: calculate a link budget for a real-world deployment scenario.
Network Design and Planning
- PON topology: centralized versus cascaded splitting strategies.
- Fiber capacity planning and route design for urban and rural deployments.
- Coexistence of GPON and XGS-PON via WDM1r for smooth upgrades.
- Practical exercise: design a simple residential PON with a BOM and link budget.
Installation and Physical Deployment
- Fiber safety: laser handling, eye protection, and electrical safety near power lines.
- Fiber handling: stripping, cleaving, cleaning, and inspection with a microscope.
- Best practices for fusion splicing and mechanical connectorization.
- Guidelines for OLT rack installation and ONT premises placement.
- Real-world scenario: deploy a distribution point to multiple subscriber homes.
Basic Configuration (Vendor-Neutral Concepts)
- OLT provisioning: PON ports, GEM ports, T-CONTs, and service profiles.
- VLAN tagging, bandwidth profiles, and QoS for triple-play services.
- ONT authentication methods: serial number, LOID, and password registration.
- ONT state machine: from initial discovery (O1) to operation (O5).
- Practical exercise: configure voice, video, and data services on a simulator.
Operation and Monitoring
- Application of the FCAPS model to GPON networks.
- Key performance indicators: Rx/Tx optical power levels, optical budget margin, and BER.
- Using generic EMS/NMS and OMCI for status, alarms, and remote management.
- Common alarms: LOS, LOFi, DGi, TF, and their physical and logical causes.
Troubleshooting Common Issues
- Systematic fault isolation: dividing subscriber-side issues from OLT-side issues using a divide-and-conquer approach.
- ONT offline: addressing authentication failures, OMCI timeouts, and rogue ONT detection.
- Diagnosing low optical power, macrobends, and dirty connectors using OTDR and VFL.
- Practical exercise: diagnose a failing subscriber circuit from alarm data and OTDR traces.
Modern PON Standards and Future Evolution
- XGS-PON (G.9807.1 Amendment 1, May 2025): symmetric 10G for modern demands.
- 25G PON and 50G PON: next-generation frontiers for 5G transport and enterprise applications.
- Network slicing and intelligent ODN trends for 2026 and beyond.
- When and how to migrate from GPON to XGS-PON while protecting existing investments.
Best Practices, Safety, and Documentation
- Fiber safety and Class 3B laser handling procedures.
- Documentation standards: labeling, cable records, as-built drawings, and asset databases.
- Preventive maintenance: cleaning, inspection schedules, and closure management.
Certification Preparation and Review
- Overview of certifications: FOA CFOT/CFOS, BICSI INSTF/TECH, and vendor tracks.
- Relevant ITU-T standards: G.984 series, G.9807.1, and G.988 (OMCI).
- Exam topic mapping, key takeaways, and next steps for specialization.
- Final practical assessment and Q&A.
Requirements
- Basic understanding of telecommunications and IP networking concepts.
- No prior experience with fiber optics or GPON is required.
Audience
- Telecommunications technicians and engineers.
- Field deployment and installation staff.
- Network operations center personnel beginning work with GPON infrastructure.
21 Hours
Testimonials (1)
communication, knowledge from experience, solve problems,
