ÖNORM ETS 300488:1996-04

Действует

Terminal Equipment (TE) - Telephony for hearing impaired people - Characteristics of telephone sets that provide additional receiving amplification for the benefit of the hearing impaired

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ÖNORM EN 301462 V 1.1.1:2000-06

Действует

Human Factors (HF) - Symbols to identify telecommunications facilities for deaf and hard of hearing people