Private Integrated Services Network (PISN); Specification, functional models and information flows; Call interception Additional Network Feature (ANF) [ISO/IEC 15053 (2003), modified] (édition 1.2.1)
Private Integrated Services Network (PISN); Specification, functional models and information flows; Call interception Additional Network Feature (ANF) [ISO/IEC 15053 (2003), modified] (uitgave 1.2.1)