DOCSIS (Infrastructure (Specialist) –Hybrid

Key Responsibilities/Job Functions

This technical resource will assist the team with day-to-day investigation of network impairments

and other DOCSIS capacity related issues

The position reports to and supports management and assists with daily activities that include:

• Diagnosing congestion issues (service group overload, excessive upstream traffic)
• Identifying rogue or high-usage subscribers
• Differentiating RF issues from capacity-related slowdowns
• Investigating RF impairments on both HFC and Remote Phy Architectures
• Identifying DOCSIS Capacity related issues
• Working with other teams to resolve issues satisfactorily
• Provide reporting and summarization of issues found and steps taken to resolve
  
  

Job Qualifications

• DOCSIS Fundamentals
• Understanding of DOCSIS 3.0, 3.1, and 4.0 standards
• Channel bonding, modulation schemes (QAM, OFDM, OFDMA)
• DOCSIS MAC layer operations and scheduling
• QoS (Quality of Service) and Service Flows
• RF & HFC Network Knowledge
• RF signal propagation in HFC networks
• Upstream and downstream RF impairments (noise, ingress, micro-reflections,
  
  

group delay)

• Understanding of RF metrics
• HFC plant architecture (nodes, amplifiers, taps, splitters)
• Return path analysis and troubleshooting
• Network Performance & Telemetry Analysis
• Understanding of DOCSIS counters and telemetry (Pre-Equalization, FEC,
  
  

Ranging, Load)

• Tools like PNM (Proactive Network Maintenance) and CMTS telemetry
• Real-time monitoring tools (e.g., SNMP, Grafana, Splunk)
• Troubleshooting & Root Cause Analysis
• Diagnosing congestion issues (service group overload, excessive upstream
  
  

traffic)

• Identifying rogue or high-usage subscribers
• Differentiating RF issues from capacity-related slowdowns