Open-Source IVR and AI Phone Systems: The Complete Guide

A guide to open-source IVR and AI phone systems: what Asterisk, FreePBX, FreeSWITCH and FusionPBX do, where an AI agent takes over the press-1 menu, how each PBX connects to Dograh, transfers, outbound calls, models and cost.

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Deep Dives in This Series

Comparison

FreeSWITCH vs Asterisk for AI Voice Agents: SIP and Setup Paths

FreeSWITCH vs Asterisk for AI voice agents: how each hands a call to an agent, the SIP and version details that matter, transfers and outbound calls on each, why speed benchmarks should not decide it, and which team each fits.

Tutorial

How to Connect FreeSWITCH to an AI Voice Agent Over a SIP Trunk

Connect FreeSWITCH to an AI voice agent over a SIP trunk: read the SIP details from Dograh Managed SIP, add a gateway with registration off, send DIDs to the agent, let the agent call out through FreeSWITCH and test a transfer.