Private Integrated Services Network (PISN);Inter-exchang
e signalling protocol;Common information Additional Network Feature (ANF) [ISO/IEC 15772 (2003), modified] (Endorsed by Asociación Española de Normalización in December of 2021.)
Private Integrated Services Network (PISN);Inter-exchange signalling protocol;Common information Additional Network Feature (ANF) [ISO/IEC 15772 (2003), modified] (Endorsed by Asociación Española de Normalización in December of 2021.)
