:
ITU (International Telecommunication Union) (). 1932 . : . 1949 . ITU - (). 4 ITU-T ITU-R , , 4 . ITU () - -, , .. , .
ITU-D (International Telecommunication Union Development Sector) , -D. ITU, .
ITU-R (International Telecommunication Union Radio Sector) , -. ITU-R 1993 . ( ) CCIR (International Radio Consultative Committee), 1927 . ITU-R 9 (SG), . 1.
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ITU-R
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SG8 | , |
SG9 | ( ) |
ITU-T (International Telecommunication Union Telecommunication Standardization Sector) , -. ITU-T 1993 . ( ) CCITT (Consultative Committee for International Telephone and Telegraphy). 1956 . (1924 .) (1924 .). ITU-T 17 (.2).
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ITU-T
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SG13 | IP- |
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SG16 | , |
SSG | IMT-2000 |
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ITU-T Recommendation ITU-T. , . , , ITU, . 25 (), A Z (. 3). , , X.25, G.703.
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ITU-T
A | ITU-T |
B | (, ..) |
C | |
D | |
E | |
F | ( .) |
G | |
H | |
I | (ISDN) |
J | |
K | |
L | |
M | (TMN) |
N | |
O | |
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Q | |
R | |
S | |
T | |
U | |
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Z |
(Conference of European Postal and Telecommunications Administrations) . - 19 1959 . 43 . : (CERP) (ERC ECTRA). ITU-T NET, .
ECTRA (European Committee for Telecommunications Regulatory Affairs) (. www.radio.gov.uk)
ERC (European Radiocommunications Committee)
NET (Normes Europeennes de Telecommunications) , . PSTN, PSDN, ISDN, .
ETSI (European Telecommunications Standards Institute) . 1988 . . 2002 . ETSI 2800 , .. GSM, DECT, TETRA . (. www.etsi.org)
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3GPP: 3rd Generation Partnership Project - W-CDMA ARIB (), ETSI (), T1P1 (), TTA () TTC (). 4 1998 .
3GPP2: 3rd Generation Partnership Project 2 - CDMA2000 ,
FCC (Federal Communication Commission) (), 1934 . , . - FCC .
FAC: Frequency Advisory Committee - . (); - .
ARIB: Association of Radio Industries and Businesses - , (MPT) 15 1995 . , - RCR BTA. ETSI ARIB .
1.3. .