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Main page>DIN Standards>DIN ETS 300059 Integrated Services Digital Network (ISDN); Subaddressing (SUB) supplementary service; service description; english version ETS 300059:1991
in stockReleased: 1992-09
DIN ETS 300059
Integrated Services Digital Network (ISDN); Subaddressing (SUB) supplementary service; service description; english version ETS 300059:1991
