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COMMUNICATIONS PROTOCOLS D-7
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Table D-2. Some CCITT Analog Standards
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Name Title Equivalent
Standard(s)
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V.3 International alphabet no. 5 ANSI X3.4; FIPS 1-1; ISO 646
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V.4 General structure of signals of international alphabet no. 5 code for
data transmission over public telephone networks
CCITT X.4; ISO 1155; ANSI X3.15;
FED-STD 1010; FIPS 16-1
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V.5 Standardization of data signaling rates for synchronous data
transmission in the general switched telephone network
ANSI X3.1; RS-269B; FED-STD 1013;
FIPS 22-1
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V.6 Standardization of data signaling rates for synchronous data
transmission over leased telephone-type circuit
ANSI X3.1; RS-269B; FED-STD 1013;
FIPS 22-1
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V.10 Electrical characteristics for unbalanced double-current interchange
circuits for general use with integrated circuit equipment in the field
of data communications
CCITT X.26; RS-423A; FED-STD
1030A
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V.11 Electrical characteristics for balanced double-current interchange
circuits for general use with integrated circuit equipment in the field
of data communications
CCITT X.27; RS-422A; FED-STD
1020A
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V.22 1200 bps duplex modem standardized for use on the general switched
telephone network and on leased circuits
FED-STD 1008
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V.24 List of definitions for interchange circuits between DTE and DCE RS-232C; RS-449; RS-449.1; RS-266A
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V.25 Automatic calling and/or answering equipment on the general
switched telephone network, including disabling of echo suppressors
on manually established calls
RS-366A
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V.26bis 2400/1200 bps modem standardized for use on the general switched
telephone network
FED-STD 1005
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V.27bis 4800/2400 bps modem with automatic equalizer standardized for use
on leased telephone-type circuits
FED-STD 1006
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V.27ter 4800/2400 bps modem standardized for use on the general switched
telephone network
FED-STD 1006
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V.28 Electrical characteristics for unbalanced double-current interchange
circuits
RS-232C
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(Continued)