Traditional phone lines are disappearing. By 2025, the "Public Switched Telephone Network" (PSTN) is being phased out in favor of VoIP (Voice Over Internet Protocol). But how does your voice travel from a microphone in one country to a speaker in another in milliseconds? This episode pulls back the curtain on the technology behind Zoom, Teams, and WhatsApp, breaking down the journey from analog sound to digital packets.

We explore the "Four-Step Journey" of a VoIP call, the protocols that make it happen (SIP and RTP), and why businesses are rushing to adopt this flexible, cost-effective communication standard. However, riding on the open internet comes with risks—we’ll also tackle the dark side of VoIP, from eavesdropping to "Vishing" (voice phishing), and how to build a fortress around your conversations.

🎙️ What You’ll Learn:

• The Anatomy of a Call: Understanding Codecs (G.711, Opus) and how they compress your voice without losing quality.

• Packetization & RTP: Why your voice is broken into tiny pieces and why UDP is used instead of TCP for real-time talk.

• SIP (Session Initiation Protocol): Meet the "digital operator" that finds your contact, rings their phone, and manages the connection.

• VoIP vs. Traditional Landlines: Why the 2025 PSTN switch-off makes VoIP a necessity, not just an option.

• Security & Vishing: Identifying spoofed caller IDs and how hackers use "packet sniffing" to listen in on unencrypted calls.

• Hardening Your System: How to implement SRTP (Secure RTP) and SIP over TLS to ensure your private meetings stay private.

🎧 Tune in to master the protocols of modern conversation and learn how to protect your "Voice Data" from the next generation of cyber threats.