36 CFR Part 1194 - Proposed Information and Communication Technology (ICT) Standards and Guidelines NPRM - Preamble

410.6.3 Interoperability (Section-by-Section Analysis)

This section proposes that, where ICT with real-time two-way voice communication operates outside of a closed network or connects to another system, such ICT must ensure real-time text interoperability by using one of two cross-manufacturer, non-proprietary consensus standards depending on the nature of the system with which it is exchanging information—namely, a traditional telephone network or Internet-based telephony.

410.6.3.1 PSTN (Section-by-Section Analysis)

This section proposes that, where ICT with real-time two-way voice communication interoperates with the publicly switched telephone network (PSTN), real-time text conform to TIA 825-A (incorporated by reference in 508 Chapter 1 and 255 Chapter 1). This is the current industry standard for TTY signals (also known as Baudot) at the PSTN interface.

410.6.3.2 VoIP Using SIP (Section-by-Section Analysis)

This section proposes that, where ICT with real-time two-way voice communication interoperates with “Voice over Internet Protocol” (VoIP) products or systems that use Session Initiated Protocol (SIP), real-time text conform to RFC 4103 (incorporated by reference in 508 Chapter 1 and 255 Chapter 1). In Question 8 above, see Section V.D., the Board seeks comment regarding the potential benefits, costs, and drawbacks associated with referencing other standards in addition to RFC 4103.