Title 47—Telecommunication--Volume 1
PART 67—REAL-TIME TEXT
§ 67.1   Definitions.
(a) Authorized end user device means a handset or other end user device that is authorized by the provider of a covered service for use with that service and is able to send, receive, and display text.
(b) CMRS provider means a CMRS provider as defined in § 20.18(c) of this chapter.
(c) Covered service means a service that meets accessibility requirements by supporting RTT pursuant to part 6, 7, 14, 20, or 64 of this chapter.
(d) RFC 4103 means IETF's Request for Comments (RFC) 4103 (incorporated by reference, see § 67.3 of this part).
(e) RFC 4103-conforming service or user device means a covered service or authorized end user device that enables initiation, sending, transmission, reception, and display of RTT communications in conformity with RFC 4103.
(f) RFC 4103-TTY gateway means a gateway that is able to reliably and accurately transcode communications between (1) RFC 4103-conforming services and devices and (2) circuit-switched networks that support communications between TTYs.
(g) Real-time text (RTT) or RTT communications means text communications that are transmitted over Internet Protocol (IP) networks immediately as they are created, e.g., on a character-by-character basis.
(h) Support RTT or support RTT communications means to enable users to initiate, send, transmit, receive, and display RTT communications in accordance with the applicable provisions of this part.
§ 67.2   Minimum Functionalities of RTT.
(a) RTT-RTT Interoperability. Covered services and authorized end user devices shall be interoperable with other services and devices that support RTT in accordance with this part. A service or authorized end user device shall be deemed to comply with this paragraph (a) if:
(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. Covered services and authorized end user devices shall be interoperable with TTYs connected to other networks. Covered services and authorized end user devices shall be deemed to comply with this paragraph (b) if communications to and from such TTYs:
(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. Covered services and authorized end user devices shall enable the user to:
(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 or email fr.inspection@nara.gov. The material may be obtained from the source in the following paragraph of this section.
(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 or directly at 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]