The TTY-PASS (TTY Performance Assessment and Scoring System) was established in March of 2005 through a partnership with TelecomXchange International (TXI) and the National Emergency Number Association (NENA).
TTY-PASS was developed in support of the Americans with Disabilities Act (ADA) requiring equal access to TTY users. The ADA states very clearly that every call-taking position within a PSAP must have its own TTY or TTY-compatible equipment. PSAPs must have systems that enable call takers to handle TTY calls as properly, promptly, and reliably as voice calls. Every call-taking position needs its own TTY equipment.
Further, the ADA requires that TTY equipment must be maintained and tested at least as often as voice telephone equipment, to ensure that the equipment is operating properly.
Relevant NENA Documents