Texas State University
 
LBJ 5-5.1
601 University Drive
San Marcos, TX 78666

Ph: (512) 245.3451
Fax: (512) 245.3452
ods@txstate.edu

site links

online services

Share This Page

  • E-mail
adjust type sizemake font smallermake font largerreset font size

Telecommunication Devices for the Deaf

What is a TTY?

A TTY (Teletypewriter), also called TDD (Telecommunication Device for the Deaf), is a device that allows individuals who are either Deaf/ Hard of Hearing, or speech impaired to communicate over the telephone.  The device is fairly straightforward to use and requires just a little time and practice in order to master.  Anyone who has used a keyboard or typewriter will find that little else is needed as far as skill or technical proficiency.  

If you need to call and person who is Deaf/Hard of Hearing and do not have a TTY/TDD, Relay Texas can facilitate communication.   

The university has pay and courtesy TTY's available on campus.

How do I use a TTY?

  1. Place the handset in the acoustic coupler (modem) attached to a regular telephone and turn on the power. Two small lights will come on. Only the power light will stay on: the phone light waits to respond to any sounds picked up by the acoustic coupler.
  2. Dial the number and watch the phone light, which shows the dial tone, busy signal, or ringing by corresponding light patterns. The light remains on for the length of the sound and goes off when there is no sound. For example, the light flashes rapidly and rhythmically with a busy signal.
  3. People answering the phone will respond with their names and a short message followed by "GA" which means "go ahead."
  4. You start typing at this point and identify yourself at the beginning of the TTY call.
  5. To end a turn in the conversation, type "GA", and the other person will begin typing again. Each person is expected to take a turn only after receiving a "GA" from the other party.
  6. When you are done with your conversation, type "GA to SK", meaning "go ahead to stop keying" or "good-bye", to let the person know you are finished with talking on the TTY.
  7. A TTY message in process cannot be interrupted, even if one knows what the other person is going to type.