Browse free open source Telephony software and projects for Linux below. Use the toggles on the left to filter open source Telephony software by OS, license, language, programming language, and project status.
Issabel PBX - Unified Communications
Unified Communications Server
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
A simple noise gate app intended for use with VOIPs like Skype.
VICIdial Contact Center Suite
The most affordable CRM system according to Capterra
Cellular manager for mobile phones/modems
Remote control software for applications using Bluetooth or Wi-Fi.
Java wrapper for the popular chat & VOIP service
Web based system for Computer Assisted Telephone Interviewing (CATI)
Enterprise telephony recording and retrieval system
Sim Card explorer and decoder