Resources

OpenH323 Project:

https://www.openh323.org/

https://www.openswitch.org/

https://www.linuxjack.com/

https://www.linuxtelephony.org/

https://www.asteriskpbx.org/

https://www.voxilla.org/

https://www.opengatekeeper.org/

https://www.packetizer.com/

Vovida Networks, Inc. —Open Source Protocol Stacks (recently acquired by Cisco):

https://www.vovida.com/opensource.html

https://www.cs.columbia.edu/~hgs/rtp/

https://www.cs.columbia.edu/~hgs/sip/

https://www.pulver.com/

https://www.ietf.org/html.charters/iptel-charter.html