freedom to communicate the "free" in freepbx stands for freedom. that's because freepbx, the world's most popular open source ip pbx, gives users the

simply innovatingupholding your competitive edgesimply protectingfortifying your it infrastructuresimply connectingcreating your network to successsimply sangomainnovating, protecting, and connecting since 1984 previous slide next slide sangoma has made it our mission […]

your go-to website for anything voip (voice over ip). including voip software & hardware, service providers, tips and tricks, ip networks and ip telephony.

github is where over 100 million developers shape the future of software, together. contribute to the open source community, manage your git repositories, review code like a pro, track bugs and features, power your ci/cd and devops workflows, and secure code before you commit it.

since 1983, developing the free unix style operating system gnu, so that computer users can have the freedom to share and improve the software they use.

stack overflow is the largest, most trusted online community for developers to learn, share​ ​their programming ​knowledge, and build their careers.

spinics.net is mostly mailing list archives these days

3cx ip-атс, видеоконференции, live chat с ❱ 3cx ® без скрытых затрат. бесплатно для неограниченного числа пользователей. ☛ попробуйте!

linphone is an open source sip client for hd voice/video calls, 1-to-1 and group instant messaging, conference calls etc. available for ios, android, windows, macos and gnu/linux.