ETSI ETR 187-ed.1

Human Factors (HF); Recommendation of characteristics of telephone services tones when locally generated in telephony terminals

NORMA vydána dne 15.4.1995

The information about the standard:

Designation standards: ETSI ETR 187-ed.1
Publication date standards: 15.4.1995
The number of pages: 12
Approximate weight : 36 g (0.08 lbs)
Country: European technical standard
Kategorie: Technické normy ETSI