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设置里辅助功能TTY/TDD是什么意思?
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设置里辅助功能TTY/TDD是什么意思?
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TTY mode allows deaf people to communicate with family,friends,businesses and emergency services with the help of a TTY-compatible phone and a compatible device..A telecommunications device for the deaf (TDD) is an electronic device for text communication via a telephone line,used when one or more of the parties has hearing or speech difficulties.
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