Standards
[CURRENT]
NF Z82-208
; NF ETS 300208:1997-11-01
NF Z82-208
; NF ETS 300208:1997-11-01
Integrated Services Digital Network (ISDN). Freephone (FPH) supplementary service. Service description
Title (German)
DIENSTINTEGRIERTES DIGITALNETZ (ISDN). DIENSTMERKMAL FREIRUF. DIENSTBESCHREIBUNG