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ITU-T Q.952 Stage 3 description for call offering supplementary services using DSS1 - Diversion supplementary services
ITU-T Q.955.3 Stage 3 description for community of interest supplementary services using DSS 1 - Clause 3: Multi-level precedence and preemption (MLPP)
ITU-T Q.954.1 Stage 3 description for multiparty supplementary services using DSS 1 : Conference calling
ITU-T R.11 Calculation of the degree of distortion of a telegraphie circuit in terms of the degrees of distortion of the component links
ITU-T R.114 Numbering of international TDM channels
ITU-T S.4 Special use of certain characters of the International Telegraph Alphabet No. 2
ITU-T R.117 End-to-end error performance for telegraph, telex and gentex connections involving regenerative equipment
ITU-T S.16 Connection to the telex network of an automatic terminal using a V.24 DCE/DTE interface
ITU-T S.33 Alphabets and presentation characteristics for the intex service
ITU-T T.102 Syntax-based videotex end-to-end protocols for the circuit mode ISDN
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