IEC 60839-7-11:2001 EN_D 9349f242
Alarm systems - Part 7-11: Message formats and protocols for serial data interfaces in alarm transmission systems - Serial protocol for use by digital communicator systems using ITU-T Recommandation V.23 signalling at interfaces with the PSTN
废止
发布日期 :
2001-03-09
实施日期 :
ISO 7731:1986 EN 1905a783
Danger signals for work places — Auditory danger signals
废止
发布日期 :
1986-12-18
实施日期 :