PART 67—REAL-TIME TEXT Authority: 47 U.S.C. 151-154, 225, 251, 255, 301, 303, 307, 309, 316, 615c, 616, 617. Source: 82 FR 7707, Jan. 23, 2017, unless otherwise noted. § 67.1 Definitions. (a) Authorized end user device (b) CMRS provider (c) Covered service (d) RFC 4103 see (e) RFC 4103-conforming service or user device (f) RFC 4103-TTY gateway (g) Real-time text (RTT) RTT communications e.g., (h) Support RTT support RTT communications § 67.2 Minimum Functionalities of RTT. (a) RTT-RTT Interoperability. (1) It is an RFC 4103-conforming end user device; (2) RTT communications between such service or end user device and an RFC 4103-conforming service or end user device are reliably and accurately transcoded— (i) to and from RFC 4103, or (ii) to and from an internetworking protocol mutually agreed-upon with the owner of the network serving the RFC 4103-conforming service or device. (b) RTT-TTY Interoperability. (1) Pass through an RFC 4103-TTY gateway, or (2) are reliably and accurately transcoded to and from an internetworking protocol mutually agreed-upon with the owner of the network serving the TTY. (c) Features and Capabilities. (1) Initiate and receive RTT calls to and from the same telephone numbers for which voice calls can be initiated and received; (2) transmit and receive RTT communications to and from any 911 public safety answering point (PSAP) in the United States; and (3) send and receive text and voice simultaneously in both directions on the same call using a single device. § 67.3 Incorporation by Reference. (a) Certain material is incorporated by reference into this part with the approval of the Director of the Federal Register under 5 U.S.C. 552(a) and 1 CFR part 51. All approved incorporation by reference (IBR) material is available for inspection at the FCC and the National Archives and Records Administration (NARA). Contact the FCC through the Federal Communications Commission's Reference Information Center, phone: (202) 418-0270. For information on the availability of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations.html [email protected]. (b) Internet Engineering Task Force (IETF), c/o Association Management Solutions, LLC (AMS) 5177 Brandin Court, Fremont, California 94538, phone (510) 492-4080, Web site at http://ietf.org https://www.ietf.org/rfc/rfc4103.txt. (1) Request for Comments (RFC) 4103, Real-time Transport Protocol Payload for Text Conversation (2005), IBR approved for § 67.1. (2) [Reserved] [82 FR 7707, Jan. 23, 2017, as amended at 85 FR 64408, Oct. 13, 2020; 88 FR 21445, Apr. 10, 2023]