Alarm systems. Alarm transmission systems and equipment. Requirements for systems with voice communicators using the public switched telephone network.
NORMA vydaná dňa 15.7.1998
Designation standards: BS EN 50136-1-4:1998
Note: NEPLATNÁ
Publication date standards: 15.7.1998
The number of pages: 8
Approximate weight : 24 g (0.05 lbs)
Country: British technical standard
Kategória: Technické normy BS