Delivery: Online | Est. Length: 4 Seat Hours | Price: $215.00
Course Overview
The NCTI Full Duplex DOCSIS (FDX) course prepares broadband technicians for the future of symmetrical connectivity.
Traditionally, cable networks have been downstream-heavy. Full Duplex (FDX) changes the game by enabling simultaneous upstream and downstream communications on the same frequency, unlocking massive symmetrical capacity. This course explains how FDX leverages Distributed Access Architecture (DAA) and sophisticated Echo Cancellation techniques to solve the interference challenges inherent in simultaneous transmission. Students will learn the difference between Frequency Division Duplexing (FDD) and true Full Duplex operation, ensuring they are ready to deploy and maintain 10G-capable networks.
Who Should Attend:
- HFC Network Engineers
- Headend Technicians
- System Designers
- Maintenance Technicians
What You Will Learn
Upon completion, students will be able to explain the mechanics of FDX operation and how networks manage interference to achieve symmetrical speeds.
Core Competencies:
- FDX Fundamentals: Define full duplex operation and list the reasons for deployment (Symmetrical 10G capacity).
- Interference Management: Describe how Interference Groups (IGs) are discovered and used to prevent modems from “talking over” one another.
- Echo Cancellation: Explain how the fiber node and modems use echo cancellation to suppress self-interference, adjacent leakage, and adjacent channel interference.
- Spectrum Allocation: Identify the specific frequency bands allocated for FDX and distinguish between FDX-Limited and full FDX modems.
- Traffic Control: Describe the “Sounding Process” and the hierarchy of Resource Block (RB) assignments used to manage traffic within interference groups.
- Node Requirements: Describe the specific hardware and architectural requirements (N+0, DAA) for a fiber node to support full duplex.
Certification and Benefits
Prepare for Symmetrical 10G
This course provides the specialized knowledge required to implement the next generation of DOCSIS standards.
Additional Benefits:
- Industry Recognition: Receive the NCTI Certificate of Graduation.
- Future-Proofing: Understand the technologies (DAA, Remote PHY) that are foundational to FDX.
- Technical Depth: Move beyond basic RF theory to understand complex interference mitigation strategies.
Course Outline
Module 1: Implementing Full Duplex DOCSIS
- Weighing the benefits of Full Duplex vs. Legacy operations.
- Identifying the FDX Frequency Spectrum.
- Recognizing Downstream and Upstream power levels in a simultaneous environment.
Module 2: Enabling Full Duplex Operation
- Interference Groups: Defining, discovering, and managing IGs.
- Echo Cancellation: Suppressing echoes in the FDX Fiber Node.
- Modem Technology: Addressing interference (ACI/ALI) in FDX modems.