In the absence of alternative suppliers in an exchange area, an exchange carrier must provide a hearing aid compatible telephone, as defined in Sec. 68.316 of this chapter, and provide related installation and maintenance services for such telephones on a detariffed basis to any customer with a hearing disability who requests such equipment or services. [61 FR 42185, Aug. 14, 1996. Redesignated at 73 FR 21259, Apr. 21, 2008]