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2. 3GPP - Wikipedia

   en.wikipedia.org/wiki/3GPP

   Current 3GPP standards incorporate the latest revision of the GSM standards. The documents are made available without charge on 3GPP's web site. The Technical Specifications cover not only the radio part ("Air Interface") and Core Network, but also billing information and speech coding down to source code level.

3. Comparison of mobile phone standards - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_mobile_phone...

   Cellular network standards and generation timeline. This is a comparison of standards of wireless networking technologies for devices such as mobile phones.A new generation of cellular standards has appeared approximately every tenth year since 1G systems were introduced in 1979 and the early to mid-1980s.

4. Multimedia telephony - Wikipedia

   en.wikipedia.org/wiki/Multimedia_Telephony

   The 3GPP/NGN IP Multimedia Subsystem (IMS) multimedia telephony service (MMTel) is a global standard based on the IMS, offering converged, fixed and mobile real-time multimedia communication using the media capabilities such as voice, real-time video, text, file transfer and sharing of pictures, audio and video clips. With MMTel, users have the ...

5. System Architecture Evolution - Wikipedia

   en.wikipedia.org/wiki/System_Architecture_Evolution

   System Architecture Evolution (SAE) is the core network architecture of mobile communications protocol group 3GPP's LTE wireless communication standard.. SAE is the evolution of the GPRS Core Network, but with a simplified architecture; an all-IP Network (AIPN); support for higher throughput and lower latency radio access networks (RANs); and support for, and mobility between, multiple ...

6. Comparison of audio coding formats - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_audio_coding...

   Various proprietary VoIP software FFmpeg voice recording: No Yes No Yes No G.726: ITU-T 1990-12 Free Various proprietary VoIP software FFmpeg, Ekiga and other VoIP software voice recording: No Yes No No No G.728: ITU-T 1992-09 Non-free Various proprietary VoIP software voice recording: No Yes No Yes No G.729: ITU-T 1996-03 G.729 (06/12) Free ...

7. Real-time text - Wikipedia

   en.wikipedia.org/wiki/Real-time_text

   Real-time text programs date at least to the 1970s, with the talk program on the DEC PDP-11, which remains in use on Unix systems. Beam Messenger, a mobile app offering real-time text messaging, was released in 2014. [3] Certain real-time text applications have a feature that allows the real-time text to be "turned off", for temporary purposes.

8. Comparison of instant messaging protocols - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_instant...

   3GPP standards: Friedhelm Hillebrand: 1985 Proprietary: Phone number (e.g. +15550123) Yes No No About 250 contacts in SIM, unlimited from phone. No serial messages Medium No Yes 3G-324M/ViLTE: RCS: No ? ? 3GPP standards; Bitmessage: Jonathan Warren 2012 Nov Open standard: Alphanumeric address Yes Yes Yes Yes No Yes Yes (through proof-of-work ...

9. SIP extensions for the IP Multimedia Subsystem - Wikipedia

   en.wikipedia.org/wiki/SIP_extensions_for_the_IP...

   These two extensions allow users to specify their preferences about the service the IMS provides. With the caller preferences extension, [8] the calling party is able to indicate the kind of user agent they want to reach (e.g. whether it is fixed or mobile, a voicemail or a human, personal or for business, which services it is capable to provide, or which methods it supports) and how to search ...