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>DIN Standards>DIN ETS 300139 Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; service description; english version ETS 300139:1992
in stockReleased: 1992-12
DIN ETS 300139 Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; service description; english version ETS 300139:1992

DIN ETS 300139

Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; service description; english version ETS 300139:1992

ISDN; Dienstmerkmal Halten; Dienstbeschreibung; Englische Fassung ETS 300139:1992

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Status:Standard
Released:1992-12
Standard number:DIN ETS 300139
Language:English
Name:Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; service description; english version ETS 300139:1992
Pages:18
DESCRIPTION

DIN ETS 300139

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