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

o Understanding of DOCSIS 3.0, 3.1, and 4.0 standards

o Channel bonding, modulation schemes (QAM, OFDM, OFDMA)

o DOCSIS MAC layer operations and scheduling

o QoS (Quality of Service) and Service Flows

• RF & HFC Network Knowledge

o RF signal propagation in HFC networks

o Upstream and downstream RF impairments (noise, ingress, micro-reflections,

group delay)

o Understanding of RF metrics

o HFC plant architecture (nodes, amplifiers, taps, splitters)

o Return path analysis and troubleshooting

• Network Performance & Telemetry Analysis

o Understanding of DOCSIS counters and telemetry (Pre-Equalization, FEC,

Ranging, Load)

o Tools like PNM (Proactive Network Maintenance) and CMTS telemetry

o Real-time monitoring tools (e.g., SNMP, Grafana, Splunk)

• Troubleshooting & Root Cause Analysis

o Diagnosing congestion issues (service group overload, excessive upstream

traffic)

o Identifying rogue or high-usage subscribers

o Differentiating RF issues from capacity-related slowdowns