Browse free open source Telephony software and projects 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
Simply explore your Android phone!
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
Unified Communications Server
A simple noise gate app intended for use with VOIPs like Skype.
VICIdial Contact Center Suite
Remote control software for applications using wi-fi or bluetooth
The most affordable CRM system according to Capterra
Browse on Tor/i2p, Anon p2p Chat / FileTx, Conf / Video VoIP
OpenSource Call Center and Dialer System
AT commands as input are sent to modem and responses given as output.
An open source 3GPP LTE implementation.