ICTPBX

ICTPBX is an open-source PBX platform built on FreeSWITCH for service providers, ISPs, and ITSPs who want to offer phone services to their own clients. It provides voice, fax, SMS, and IVR all through a single dashboard and REST API, with complete tenant isolation and per-tenant branding. Everything runs on your own infrastructure with no per-user licensing costs.