Private Integrated Services Network (PISN);Specification
, functional model and information flows;Call identification and call linkage additional network features (ANF) [ISO/IEC 21888 (2001) modified] (Endorsed by Asociación Española de Normalización in December of 2021.)
Private Integrated Services Network (PISN);Specification, functional model and information flows;Call identification and call linkage additional network features (ANF) [ISO/IEC 21888 (2001) modified] (Endorsed by Asociación Española de Normalización in December of 2021.)
