Standards are developed mainly by 3 entities:
Standard Creation Committees
Forums
Regulatory Agencies
Standard Creation Committees
They are Procedural Bodies and they are so slow moving and cannot co-op with the fast
growing communication industry.
ISO
International Standard’s Organization
Voluntary Organization
Created in 1947
Members are from Standard Creation Committees of different countries
Includes representatives from 82 countries
Open System Interconnection (OSI) Model
ITU-T
By 1970s a lot of countries were defining standards but there was no
International compatibility
United Nations made as a part of their ITU
Consultative Committee for International Telegraphy and Telephony
(CCITT)
IN 1993 , ITU-Telecomm Standards Sector
Important ITU-T Standards
V Series (V32, V33, V42, Define Data Transmission over phone lines
X Series(X.25, 400, 500): Define Transmission over Public Digital
Network
ISDN: Integrated Services Digital Network
The American National Standard Institute (ANSI)
Private-Non Profit Cooperation not affiliated with US Government
Members include professional societies, industrial associations, govt. and regulatory bodies
Submits proposal to ITU-T and is a voting member for USA in ISO
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