A domain based multi-tenant PBX & voice switch for FreeSWITCH
Issabel PBX - Unified Communications
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
VICIdial Contact Center Suite
Remote control software for applications using wi-fi or bluetooth
VoIP/SIP SoftPhone (formerly known as jphonelite)
Simple application to capture and report on Mitel SMD data
Web based system for Computer Assisted Telephone Interviewing (CATI)
Software per Call Center
Unified Communications Server
An open source 3GPP LTE implementation.
open5g is an open source implementation of the 3GPP 5G specifications.
Cellular manager for mobile phones/modems
Frontend for ModemManager 0.6/0.7, Wader and oFono
Java VoIP Softphone (SIP) (replaced by jfPhone)
Free software and hardware for telephony
VoIP/SIP Autodialer