The CCITT, considering that the basic model page-printing machine is defined as having certain basic features for receiving (including printing) and/or transmitting; (b) Recommendations T.50 [1], V.4 [2] and X.4 [3].
ITU-T S.30 SPANISH-1988 history
1988ITU-T S.30 SPANISH-1988 STANDARDIZATION OF BASIC MODEL PAGE - PRINTING MACHINE USING INTERNATIONAL ALPHABET No. 5