DIN ETS 300139:1992-12

Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; service description.

STANDARD published on 1.12.1992

The information about the standard:

Designation standards: DIN ETS 300139:1992-12
Publication date standards: 1.12.1992
The number of pages: 18
Approximate weight : 54 g (0.12 lbs)
Country: German technical standard
Category: Technical standards DIN