BS 6839-1:1987

Заменен

Mains signalling equipment., Specification for communication and interference limits and measurements — 13 стр.

Ссылочные документы

BS EN 50065-1:1992

Заменен

Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148.5 kHz, General requirements, frequency bands and electromagnetic disturbances — 26 стр.

На этот документ ссылаются

BS EN 50065-1:1992

Заменен

Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148.5 kHz, General requirements, frequency bands and electromagnetic disturbances — 26 стр.