What does TTY TDD mean?

Related questions

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Tags

1. #equipment
2. #understand
3. #functional
4. #refer
5. #telephone
6. #hearing
7. #telecommunications
8. #acronyms
9. #teletype
10. #based
11. #amplification
12. #speech
13. #interchangeably
14. #person
15. #enough
16. #device