Two years ago, if you wanted your AI agent to handle phone calls, you were signing up for months of work. You'd need to understand SIP protocols, set up WebSocket servers, integrate separate transcription and synthesis services, and debug audio quality issues across multiple providers.
Today, the picture is completely different. Purpose-built telephony layers for AI agents handle all of that - and you get started by installing a skill file.
This guide covers what AI agent voice calling looks like in 2026, how it works, and how to add it to your agent in under 10 minutes.