TTY (Teletypewriter)

From NENA Knowledge Base

A TTY (Teletypewriter) is a device or application used to send or receive character by character communication using Baudot signaling.

Also known as:

TDD (Telecommunications Device for the Deaf)

Related Terms:

Direct Connect

A method of connecting a TTY directly into the phone line. When using direct connect, you can dial directly from the keyboard and use auto-answer features.

Integrated TTY

TTY functionality that has been integrated within a computer workstation. This may be found within the 9‑1‑1 telephony system or interfaced in a CAD (computer aided dispatch) system.

Relevant NENA Documents


External References


What’s a TTY? What’s a TDD? What’s a relay system?