Standards
[CURRENT]
DIN ETS 300059
DIN ETS 300059
Integrated Services Digital Network (ISDN); Subaddressing (SUB) supplementary service; service description; english version ETS 300059:1991
Title (German)
ISDN; Dienstmerkmal Subadressierung; Dienstbeschreibung; Englische Fassung ETS 300059:1991