Data
IETF (Internet Engineering Task Force ) http://ietf.org
W3C (World Wide Web Consortium) http://www.w3.org
Voice
VoiceXML http://www.voicexml.org
ITU (International Telecommunication Union) http://www.itu.int
ITU-T Recommendations http://www.itu.int/ITU-T
ATM Forum http://www.atmforum.com
TIA (Telecommunications Industry Association) http://www.tiaonline.org
IEEE (Institute of Electrical and Electronics Engineers) http://www.ieee.org
ETSI (European Telecommunications Standards Institute ) http://www.etsi.org
Video
MPEG2 Video format http://www.iec.org
MPEG4 video format http://www.iec.org
Mobility
WIMAX Forum http://www.wimaxforum.org
WIFI Alliance http://www.wi-fi.org
3rd Generation Mobile Group http://www.3gpp.org , http://www.3gpp2.org
UMTS Forum http://www.umts-forum.org
Telecom
Telecom products and services.
ATIS (Alliance for Telecom industry solutions) http://www.atis.org
Telecom Operating System
OSDL Carrier Grade Linux http://www.osdl.org
OSDL Mobile Linux Initiative (MLI) http://www.osdl.org
NEP (Network Equipment Providers)
SCOPE Alliance http://www.scope-alliance.org
Telecom Middleware
SA Forums http://www.saforum.org
COTS (Commercial off the shelf hardware) hardware.
MVA (Mountain View Alliance) http://www.mountainviewalliance.org
Telecom Hardware.
ATCA (Advanced Telecom Computing Architecture) or Blades standarized HA hardware http://www.picmg.org/v2internal/newinitiative.htm
Telecom Cable Interfacing.
Cablelabas http://www.cablelabs.com