WAC 118-67-110
WAC 118-67-110. TTY access to 911 services
RCSCs subject to this section must be capable of transmitting 911 calls from individuals with speech or hearing disabilities through means other than mobile radio devices, e.g., through the use of text telephone devices (TTY), text-to-911, and real-time text (RTT). Operators of digital wireless systems must comply with the provisions of this paragraph.