Technical Insights
Solving complex engineering problems in VoIP, Linux, and Scalable Systems. Written by Sunil Kumar Nayak.
Troubleshooting One-Way Audio in SIP: A Wireshark Guide
One-way audio is the ghost of VoIP. Here’s a practical guide to hunting it down using Wireshark, checking SDP, and verifying RTP flows.
Optimizing FreeSWITCH for 5000+ Concurrent Calls
Scaling VoIP infrastructure requires deep Linux and FreeSWITCH tuning. Learn about core binding, file descriptors, and SIP profile optimization.
Tracking Down Memory Leaks in C with Valgrind
Memory leaks in long-running services like VoIP softswitches are fatal. A deep dive into using Memcheck to find lost bytes.
Linux Kernel Tuning for High-Performance VoIP Servers
VoIP is sensitive to latency (jitter). Standard Linux distros are tuned for throughput, not latency. Let's fix that.
WebRTC vs. SIP: Understanding the Differences & Use Cases
Is SIP dead? No. But WebRTC is changing the browser landscape. Breaking down the signaling vs. media differences.
Mastering NAT Traversal: STUN, TURN, and ICE Explained
Why does audio fail when users are on different Wi-Fi networks? The deep technical reality of Network Address Translation.