Standards
[CURRENT]
DIN ETS 300050
DIN ETS 300050
Integrated Services Digital Network (ISDN); Multiple Subscriber Number (MSN) supplementary service; service description; english version ETS 300050:1991
Title (German)
ISDN; Dienstmerkmal Mehrfachrufnummer; Dienstbeschreibung; Englische Fassung ETS 300050:1991