What is TTY Calls in phone sittings

[Guest masalism]

I have this option under START>SITTING>PHONE SITTINGS= TTY CALLS, just under the PREFERRED BAND, and don't know what deos it means? if someone have an idea will be greatfull.

thnks.

[Guest roma0803]

The TTY enables people who are deaf, hard of hearing, or speech impaired to converse on the telephone by typing messages that are sent through the telephone network. A TTY works by converting text messages into a sound–based code (loud beeps) that are transmitted through the telephone line. The person on the other end of the line must also use a TTY to decode the sounds back into text. Each party in the conversation takes a turn typing a message and then reads the response of the other person.

[Guest Seth Cold]

The TTY enables people who are deaf, hard of hearing, or speech impaired to converse on the telephone by typing messages that are sent through the telephone network. A TTY works by converting text messages into a sound–based code (loud beeps) that are transmitted through the telephone line. The person on the other end of the line must also use a TTY to decode the sounds back into text. Each party in the conversation takes a turn typing a message and then reads the response of the other person.

<{POST_SNAPBACK}>

wow cool tip.. didnt have a clue