Acronyms von A bis Z
Q.957
Empfehlung der "CCITT"/"ITU" von 1993: Stage 3 description for additional information transfer supplementary services using DSS 1 Clause 1 (1993) User-to-user signalling
Empfehlung der "CCITT"/"ITU" von 1993: Stage 3 description for additional information transfer supplementary services using DSS 1 Clause 1 (1993) User-to-user signalling