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Title: WiFi Voice Quality Troubleshooting & Network Optimization for Global WiFi Handset Manufacturer
Client Name: Global WiFi Handset Manufacturer
Project Objective:
Assist a global WiFi handset manufacturer in identifying and resolving voice quality issues experienced during a Proof of Concept (PoC) at a customer site. The OEM suspected the customer’s Cisco wireless network was either misconfigured or poorly designed, rather than the handsets being at fault. Our goal was to diagnose, document, and provide actionable solutions to improve the wireless environment, ensuring a successful PoC and large-scale handset deployment.
OEM Vendor Products/Solutions:
• Cisco Wireless Network (Customer's Environment)
• Ekahau Site Survey & Planner for RF environment assessment
• Wireshark for deep packet analysis of VoWiFi issues
• Global WiFi Handset Manufacturer’s VoWiFi Phones
Services Rendered:
• Onsite Wireless Network Assessment & Troubleshooting:
o Conducted a full Ekahau RF site survey to document signal strength, quality, interference, and airtime utilization
o Identified coverage gaps, channel overlap, and congestion issues in the Cisco WiFi network
• Voice Quality Issue Recreation & Packet Captures:
o Reproduced call quality issues under different network conditions
o Captured PCAP files from multiple test calls for analysis
o Used Wireshark to inspect packet flows, jitter, latency, and packet loss patterns
• Root Cause Analysis & Network Recommendations:
o Analyzed RF heatmaps and call data to pinpoint issues such as excessive retries, roaming delays, and QoS misconfigurations
o Provided the customer with detailed visualizations and reports on network deficiencies
o Recommended specific Cisco WLAN controller adjustments, RF optimizations, and QoS improvements
• Customer Implementation & Validation:
o Guided the customer’s IT team in applying the necessary wireless network fixes
o Conducted post-change testing to validate improved VoWiFi performance
• Successful Proof of Concept & OEM Handset Deployment:
o Confirmed voice quality improvements after network optimizations
o Ensured the PoC met performance expectations, leading to the OEM securing a sale of several thousand handsets
Length of Project:
4 days (onsite assessment, analysis, recommendations, and final validation)
Business Outcome:
• Successfully diagnosed WiFi-related VoIP issues, proving the handsets were not at fault
• Helped the customer optimize their Cisco WiFi network for high-quality VoWiFi performance
• Enabled the OEM to secure a large handset deployment, selling several thousand units to the customer
• Provided the customer’s IT team with long-term best practices for maintaining a stable VoWiFi environment
• Strengthened the OEM’s credibility and technical expertise, improving their ability to sell into similar environments in the future