ČSN ETS 300139 (873521)

Integrated Services Digital Network (ISDN). Call Hold (HOLD) supplementary serivce. Service description

STANDARD published on 1.11.1994

Czech preface only -
Print design (1.30 USD)

The information about the standard:

Designation standards: ČSN ETS 300139
Classification mark: 873521
Catalog number: 16850
Publication date standards: 1.11.1994
The number of pages: 2
Approximate weight : 6 g (0.01 lbs)
Country: Czech technical standard
Category: Technical standards ČSN