Browse free open source PBX software and projects for Windows below. Use the toggles on the left to filter open source PBX software by OS, license, language, programming language, and project status.
Issabel PBX - Unified Communications
Unified Communications Server
The most affordable CRM system according to Capterra
VICIdial Contact Center Suite
Enterprise telephony recording and retrieval system
ERP, IP PBX, Accounting, CRM, Time tracking, and etc.
Respins of various open source PBX projects
This is a PBX dashboard showing the peer,queue,agent at real time
Implement Screen Pop for Avaya PBX
A Better PBX For Your Business