28 C.F.R. § 35.161 Telecommunication devices for the deaf (TDD's).
Title 28 - Judicial Administration
Where a public entity communicates by telephone with applicants and beneficiaries, TDD's or equally effective telecommunication systems shall be used to communicate with individuals with impaired hearing or speech.
Title 28: Judicial Administration
PART 35—NONDISCRIMINATION ON THE BASIS OF DISABILITY IN STATE AND LOCAL GOVERNMENT SERVICES
Subpart E—Communications
§ 35.161 Telecommunication devices for the deaf (TDD's).