Date of Last Update : 16 May 1995 List of ITU-T V-Series Recommendations in force ** - Series V * Data communication over the telephone network - General V.1 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Equivalence between binary notation symbols and the significant conditions of a two-condition code V.2 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Power levels for data transmission over telephone lines V.4 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] General structure of signals of international alphabet No. 5 code for character oriented data transmission over public telephone networks V.7 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Definitions of terms concerning data communication over the telephone network V.8 (09/94) [New] [10 pp.] [Publ.: Nov.94] [PN: V.id] Procedures for starting sessions of data transmission over the general switched telephone network Note - C: 56/82/105 * Interfaces and voice-band modems V.10 (1993) [Rev.1] [18 pp.] [Publ.: Mar.94] Electrical characteristics for unbalanced double-current interchange circuits operating at data signalling rates nominally up to 100 kbit/s Note - Same as X.26 V.11 (1993) [Rev.1] [14 pp.] [Publ.: Feb.94] Electrical characteristics for balanced double-current interchange circuits operating at data signalling rates up to 10 Mbit/s Note - Same as X.27 V.13 (1993) [Rev.1] [2 pp.] [Publ.: Oct.93] Simulated carrier control V.14 (1993) [Rev.1] [4 pp.] [Publ.: Jan.94] Transmission of start-stop characters over synchronous bearer channels V.15 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Use of acoustic coupling for data transmission V.16 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Medical analogue data transmission modems V.17 (02/91) [New] [11 pp.] [Publ.: May.91] A 2-wire modem for facsimile applications with rates up to 14 400 bit/s * Interworking with other networks V.18 (09/94) [New] [18 pp.] [Publ.: Nov.94] [PN: V.txp] Operational and interworking requirements for modems operating in the text telephone mode Note - C: 56/82/105 * Interfaces and voice-band modems V.19 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Modems for parallel data transmission using telephone signalling frequencies V.21 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] 300 bits per second duplex modem standardized for use in the general switched telephone network V.22 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] 1200 bits per second duplex modem standardized for use in the general switched telephone network and on point-to-point 2-wire leased telephone-type circuits V.22 bis (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] 2400 bits per second duplex modem using the frequency division technique standardized for use on the general switched telephone network and on point-to-point 2-wire leased telephone-type circuits V.23 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] 600/1200-baud modem standardized for use in the general switched telephone network V.24 (1993) [Rev.1] [19 pp.] [Publ.: Feb.94] List of definitions for interchange circuits between data terminal equipment (DTE) and data circuit-terminating equipment (DCE) V.25 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Automatic answering equipment and/or parallel automatic calling equipment on the general switched telephone network including procedures for disabling of echo control devices for both manually and automatically established calls V.25 bis (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Automatic calling and/or answering equipment on the general switched telephone network (GSTN) using the 100-series interchange circuits V.26 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] 2400 bits per second modem standardized for use on 4-wire leased telephone-type circuits V.26 bis (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] 2400/1200 bits per second modem standardized for use in the general switched telephone network V.26 ter (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] 2400 bits per second duplex modem using the echo cancellation technique standardized for use on the general switched telephone network and on point-to-point 2-wire leased telephone-type circuits V.27 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] 4800 bits per second modem with manual equalizer standardized for use on leased telephone-type circuits V.27 bis (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] 4800/2400 bits per second modem with automatic equalizer standardized for use on leased telephone-type circuits V.27 ter (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] 4800/2400 bits per second modem standardized for use in the general switched telephone network V.28 (1993) [Rev.1] [6 pp.] [Publ.: Jan.94] Electrical characteristics for unbalanced double-current interchange circuits V.29 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] 9600 bits per second modem standardized for use on point-to-point 4-wire leased telephone-type circuits V.31 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Electrical characteristics for single-current interchange circuits controlled by contact closure V.31 bis (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Electrical characteristics for single-current interchange circuits using optocouplers V.32 (1993) [Rev.1] [23 pp.] [Publ.: Jan.94] A family of 2-wire, duplex modems operating at data signalling rates of up to 9600 bit/s for use on the general switched telephone network and on leased telephone-type circuits V.32 bis (02/91) [New] [22 pp.] [Publ.: May.91] A duplex modem operating at data signalling rates of up to 14 400 bit/s for use on the general switched telephone network and on leased point-to-point 2-wire telephone-type circuits V.33 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] 14 400 bits per second modem standardized for use on point-to-point 4-wire leased telephone-type circuits V.34 (09/94) [New] [63 pp.] [Publ.: Dec.94] [PN: V.fast] a modem operating at data signalling rates of up to 28 800 bit/s for use on the general switched telephone network and on leased point-to-point 2-wire telephone-type circuits Note - C: 56/82/105 * Wide-band modems V.36 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Modems for synchronous data transmission using 60-108 kHz group band circuits V.37 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Synchronous data transmission at a data signalling rate higher than 72 kbit/s using 60-108 kHz group band circuits V.38 (1993) [New] [10 pp.] [Publ.: Jan.94] A 48/56/64 kbit/s data circuit terminating equipment standardized for use on digital point-to-point leased circuits * Error control V.41 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Code-independent error-control system V.42 (1993) [Rev.1] [74 pp.] [Publ.: Feb.94] Error-correcting procedures for DCEs using asynchronous-to-synchronous conversion V.42 bis (01/90) [New] [27 pp.] [Publ.: Jul.90] Data compression procedures for data circuit terminating equipment (DCE) using error correcting procedures * Transmission quality and maintenance V.50 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Standard limits for transmission quality of data transmission V.51 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Organization of the maintenance of international telephone-type circuits used for data transmission V.52 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Characteristics of distortion and error-rate measuring apparatus for data transmission V.53 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Limits for the maintenance of telephone-type circuits used for data transmission V.54 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Loop test devices for modems V.55 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Specification for an impulsive noise measuring instrument for telephone-type circuits V.56 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Comparative tests of modems for use over telephone-type circuits V.57 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Comprehensive data test set for high data signalling rates V.58 (09/94) [New] [58 pp.] [Publ. sched.: May.95] [PN: V.im] Management information model for V-Series DCEs Note - C: 56/82/105 * Interworking with other networks V.100 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] Interconnection between public data networks (PDNs) and the public switched telephone networks (PSTN) V.110 (09/92) [Rev.1] [58 pp.] [Publ.: Feb.93] Support of data terminal equipments with V-Series type interfaces by an integrated services digital network Note - Same as I.463 V.120 (09/92) [Rev.1] [36 pp.] [Publ.: Feb.93] Support by an ISDN of data terminal equipment with V-Series type interfaces with provision for statistical multiplexing Note - Same as I.465 V.230 (1988) [Blue Book Fasc. VIII.1] [Publ.: Nov.89] General data communications interface layer 1 specification ---------------------------------------------------------------------- Some 1120 Recommendations from the Blue Book are still in force. They are included in fascicles and volumes of the Blue Book that may still be purchased from the ITU Sales Service. 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