VoIP

General

See also WebDev#WebRTC

• http://en.wikipedia.org/wiki/Voice_over_Internet_Protocol
• http://en.wikipedia.org/wiki/Comparison_of_VoIP_software

• http://www.voip-info.org/

• http://www.opentelecoms.org/

• Free Telco Dictionary – This dictionary should be helpful for employees in telecommunications and also for independent hackers interested in this industry

Protocols

• https://en.wikipedia.org/wiki/Category:VoIP_protocols

RTP

• https://en.wikipedia.org/wiki/Real-time_Transport_Protocol - published in 1996 as RFC 1889, superseded by RFC 3550 in 2003

ZRTP

• https://en.wikipedia.org/wiki/ZRTP
• https://jitsi.org/Documentation/ZrtpFAQ
• http://www.privatewave.com/display/WS/ZRTP

• http://blog.cryptographyengineering.com/2012/11/lets-talk-about-zrtp.html

• http://zfoneproject.com/prod_zfone.html
  • https://en.wikipedia.org/wiki/Zfone

• http://www.zrtp.org/

• http://www.gnutelephony.org/index.php/GNU_ZRTP

• https://www.whispersystems.org/

SRTP

• http://tools.ietf.org/html/rfc3711
  • https://en.wikipedia.org/wiki/Secure_Real-time_Transport_Protocol

• http://webrtchacks.com/webrtc-must-implement-dtls-srtp-but-must-not-implement-sdes/

SIP

• http://www.ietf.org/rfc/rfc3261.txt - SIP: Session Initiation Protocol
  • https://en.wikipedia.org/wiki/Session_Initiation_Protocol

• https://en.wikipedia.org/wiki/GNU_SIP_Witch

• http://www.sipml5.org/

• http://www.gnutelephony.org/index.php/GNU_SIP_Witch_1.0_Announced

• SFLphone is a robust, standards-compliant enterprise softphone, for desktop and embedded systems. It is designed to handle several hundred calls a day. SFLphone is available under the GNU GPL license, version 3.

XMPP Jingle

See also Chat#Jingle

• http://xmpp.org/about-xmpp/technology-overview/jingle/
• http://xmpp.org/extensions/xep-0166.html
• https://en.wikipedia.org/wiki/Jingle_(protocol)

• http://xmpp.org/extensions/xep-0262.html - zrtp

Services

• https://secure.sipgate.co.uk/user/

• https://en.wikipedia.org/wiki/Internet_telephony_service_provider

• http://puput.io/ [1]

• OpenCNAM provides a simple, elegant, and RESTful API to get Caller ID data. Our service is built for programmers like you, who want simple access to Caller ID information.

• slydial is a free voice messaging service that connects you directly to someone's mobile voicemail. slydial is a service of MobileSphere.

Systems

• http://en.wikipedia.org/wiki/IP-PBX

Asterisk

• Asterisk is an open source framework for building communications applications. Asterisk turns an ordinary computer into a communications server. Asterisk powers IP PBX systems, VoIP gateways, conference servers and other custom solutions. It is used by small businesses, large businesses, call centers, carriers and government agencies, worldwide. Asterisk is free and open source. Asterisk is sponsored by Digium.

Today, there are more than one million Asterisk-based communications systems in use, in more than 170 countries. Asterisk is used by almost the entire Fortune 1000 list of customers. Most often deployed by system integrators and developers, Asterisk can become the basis for a complete business phone system, or used to enhance or extend an existing system, or to bridge a gap between systems.

• http://en.wikipedia.org/wiki/Asterisk_(PBX)
  • https://wiki.asterisk.org/wiki/display/AST/Asterisk+as+a+Swiss+Army+Knife+of+Telephony

Other

• http://www.gnutelephony.org/index.php/GNU_Telephony

• http://www.openvbx.org/
• https://github.com/disruptiveio/TropoVBX

• http://www.2600hz.org/projects.html

• http://yate.ro/pmwiki/

• https://en.wikipedia.org/wiki/Silent_Circle_(software)

Clients

Skype

Run multiple Skype sessions [2];

skype --dbpath=~/.Skype2 &

• http://beta.skype.com/en/download-skype/skype-for-computer/#skype-for-linux

• Karaka is a Skype/XMPP gateway that connects the Skype and XMPP clouds.

• http://markmail.org/message/exc3srjkx3uu66bz?q=android

• http://atdot.ch/scr/
• http://sourceforge.net/projects/scx-tools/
• http://sourceforge.net/projects/skype-rec/

• https://news.ycombinator.com/item?id=6660475

Mumble

• http://mumble.sourceforge.net/
  • https://en.wikipedia.org/wiki/Mumble_(software)

Ekiga

• http://ekiga.org/
  • http://wiki.ekiga.org/index.php/Ekiga_Interoperability
  • https://en.wikipedia.org/wiki/Ekiga

Jitsi

• https://jitsi.org/
  • https://en.wikipedia.org/wiki/Jitsi

SLPhone

• http://sflphone.org/
  • https://en.wikipedia.org/wiki/SFLphone

Linphone

• http://www.linphone.org/
  • https://en.wikipedia.org/wiki/Linphone

Twinkle

• http://www.twinklephone.com/ - older
  • https://en.wikipedia.org/wiki/Twinkle_(software)

I Hear U

• IHU is a Voice over IP (VoIP) application for Linux (using Qt), that creates an audio stream between two computers easily and with the minimal traffic on the network.

Other

• http://www.voip-info.org/wiki/view/Open+Source+VOIP+Software

• sscall - A simple UDP based voice chat program. Currently we use libspeexdsp for its resampling capabilities and opus as the audio codec. There will also be ssl support in future versions. We basically need something that works well on many UNIX flavours. Skype is not really the answer to that. We also want something simple so that we can build on top of it. The plan is to create another program called ssvideo for video streaming.

• 5 Skype alternatives for Linux users

• https://github.com/mofarrell/p2pvc