ITU Standards

ANSI Standards

Standards Organizations web sites:

• American National Standards Institute (ANSI)
  Standards defining the protocol and the network at the national plan
• Bell Communications Research (Bellcore)
  
• Federal Communications Commission (FCC)
  
• Telecommunications Industry Association (TIA)
  
• International Telecommunication Union (ITU)
  ITU-TTS Standards (as of 1994)
• Internet Engineering Task Force  (IETF)