Standards
[CURRENT]
NF Z82-183
; NF ETS 300183:1996-12-01
NF Z82-183
; NF ETS 300183:1996-12-01
Integrated Services Digital Network (ISDN). Conference call, add-on (CONF) supplementary service. Service description
Title (German)
ISDN. DIENSTMERKMAL "KONFERENZ". DIENSTBESCHREIBUNG