Date of Last Update : 16 May 1995 List of ITU-T S-Series Recommendations in force ** - Series S * Alphabetical telegraph terminal equipment - Start-stop terminals S.1 (1993) [Rev.1] [4 pp.] [Publ.: Sep.94] International Telegraph Alphabet No. 2 S.2 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Coding scheme using International Telegraph Alphabet No. 2 (ITA2) to allow the transmission of capital and small letters S.3 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Transmission characteristics of the local end with its termination (ITA2) S.4 (1993) [Rev.1] [4 pp.] [Publ.: Oct.94] Special use of certain characters of the International Telegraph Alphabet No. 2 S.5 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Standardization of page-printing start-stop equipment and cooperation between page-printing and tape-printing start-stop equipment (ITA2) S.6 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Characteristics of answerback units (ITA2) S.7 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Control of teleprinter motors S.8 (1993) [Rev.1] [1 pp.] [Publ.: Jun.94] Intercontinental standardization of the modulation rate of start-stop apparatus and of the use of combination No. 4 in figure-shift S.9 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Switching equipment of start-stop apparatus S.10 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Transmission at reduced character transfer rate over a standardized 50-baud telegraph channel S.11 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Use of start-stop reperforating equipment for perforated tape retransmission S.12 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Conditions that must be satisfied by synchronous systems operating in connection with standard 50-baud teleprinter circuits S.13 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Use on radio circuits of 7-unit synchronous systems giving error correction by automatic repetition S.14 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Suppression of unwanted reception in radiotelegraph multi-destination teleprinter systems S.15 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Use of the telex network for data transmission at 50 bauds S.16 (1993) [Rev.1] [11 pp.] [Publ.: Oct.94] connection to the telex network of an automatic terminal using a V.24 DCE/DTE interface S.17 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Answer-back unit simulators S.18 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Conversion between International Telegraph Alphabet No. 2 and International Alphabet No. 5 S.19 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Calling and answering in the telex network with automatic terminal equipment S.20 (1993) [Rev.1] [2 pp.] [Publ.: Jun.94] Automatic clearing procedure for a telex terminal S.21 (1993) [Rev.1] [2 pp.] [Publ.: Jun.94] Use of display screens in telex machines S.22 (1993) [Rev.1] [2 pp.] [Publ.: Jul.94] "Conversation impossible" and or pre-recorded message in response to J/BELL signals from a telex terminal S.23 (1993) [Rev.1] [2 pp.] [Publ.: Jun.94] Automatic request of the answerback of the terminal of the calling party, by the telex terminal of the called party or by the international network S.30 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Standardization of basic model page-printing machine using International Alphabet No. 5 S.31 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Transmission characteristics for start-stop data terminal equipment using International Alphabet No. 5 S.32 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Answer-back units for 200- and 300-baud start-stop machines in accordance with Recommendation S.30 S.33 (1993) [New] [5 pp.] [Publ.: Sep.94] Alphabets and presentation characteristics for the intex service S.34 (1993) [New] [3 pp.] [Publ.: Jun.94] Intex terminals - Requirements to effect interworking with the international telex service S.35 (1993) [New] [3 pp.] [Publ.: Jul.94] Answerback coding for the Intex service * Definitions S.140 (1988) [Blue Book Fasc. VII.1] [Publ.: Apr.90] Definitions of essential technical terms relating to apparatus for alphabetic telegraphy ---------------------------------------------------------------------- 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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