| List of ITU-T S-Series Recommendations in force | |
| [S.1] Recommendation S.1 (03/93) - International Telegraph Alphabet No. 2 | 20 CHF |
| [S.2] Recommendation S.2 (11/88) - Coding scheme using International Telegraph Alphabet No. 2 (ITA2) to allow the transmission of capital and small letters | 20 CHF |
| [S.3] Recommendation S.3 (11/88) - Transmission characteristics of the local end with its termination (ITA2) | 20 CHF |
| [S.4] Recommendation S.4 (03/93) - Special use of certain characters of the International Telegraph Alphabet No. 2 | 20 CHF |
| [S.5] Recommendation S.5 (11/88) - Standardization of page-printing start-stop equipment and cooperation between page-printing and tape-printing start-stop equipment (ITA2) | 20 CHF |
| [S.6] Recommendation S.6 (11/88) - Characteristics of answerback units (ITA2) | 20 CHF |
| [S.7] Recommendation S.7 (11/88) - Control of teleprinter motors | 20 CHF |
| [S.8] Recommendation S.8 (03/93) - Intercontinental standardization of the modulation rate of start-stop apparatus and of the use of combination No. 4 in figure-shift | 20 CHF |
| [S.9] Recommendation S.9 (11/88) - Switching equipment of start-stop apparatus | 20 CHF |
| [S.10] Recommendation S.10 (11/88) - Transmission at reduced character transfer rate over a standardized 50-baud telegraph channel | 20 CHF |
| [S.11] Recommendation S.11 (11/88) - Use of start-stop reperforating equipment for perforated tape retransmission | 20 CHF |
| [S.12] Recommendation S.12 (11/88) - Conditions that must be satisfied by synchronous systems operating in connection with standard 50-baud teleprinter circuits | 20 CHF |
| [S.13] Recommendation S.13 (11/88) - Use on radio circuits of 7-unit synchronous systems giving error correction by automatic repetition | 20 CHF |
| [S.14] Recommendation S.14 (11/88) - Suppression of unwanted reception in radiotelegraph multi-destination teleprinter systems | 20 CHF |
| [S.15] Recommendation S.15 (11/88) - Use of the telex network for data transmission at 50 bauds | 20 CHF |
| [S.16] Recommendation S.16 (03/93) - Connection to the telex network of an automatic terminal using a V.24 DCE/DTE interface | 20 CHF |
| [S.17] Recommendation S.17 (11/88) - Answer-back unit simulators | 20 CHF |
| [S.18] Recommendation S.18 (11/88) - Conversion between International Telegraph Alphabet No. 2 and International Alphabet No. 5 | 20 CHF |
| [S.19] Recommendation S.19 (11/88) - Calling and answering in the telex network with automatic terminal equipment | 20 CHF |
| [S.20] Recommendation S.20 (03/93) - Automatic clearing procedure for a telex terminal | 20 CHF |
| [S.21] Recommendation S.21 (03/93) - Use of display screens in telex machines | 20 CHF |
| [S.22] Recommendation S.22 (03/93) - "Conversation impossible" and or pre-recorded message in response to J/BELL signals from a telex terminal | 20 CHF |
| [S.23] Recommendation S.23 (03/93) - 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 | 20 CHF |
| [S.30] Recommendation S.30 (11/88) - Standardization of basic model page-printing machine using International Alphabet No. 5 | 20 CHF |
| [S.31] Recommendation S.31 (11/88) - Transmission characteristics for start-stop data terminal equipment using International Alphabet No. 5 | 20 CHF |
| [S.32] Recommendation S.32 (11/88) - Answer-back units for 200- and 300-baud start-stop machines in accordance with Recommendation S.30 | 20 CHF |
| [S.33] Recommendation S.33 (03/93) - Alphabets and presentation characteristics for the intex service | 20 CHF |
| [S.34] Recommendation S.34 (03/93) - Intex terminals - requirements to effect interworking with the international telex service | 20 CHF |
| [S.35] Recommendation S.35 (03/93) - Answerback coding for the intex service | 20 CHF |
| [S.36] Recommendation S.36 (07/96) - INTEX and similar services - Terminal requirements to effect interworking between terminals operating at different speeds | 20 CHF |
| Summary of Recommendationn S.36 (07/96) | |
| [S.140] Recommendation S.140 (11/88) - Definitions of essential technical terms relating to apparatus for alphabetic telegraphy | 20 CHF |
