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TTY Mode (Teletypewriter)
TTY modes are as follows:
Menu
User
Feature
Transmission/Receiving
Mode
When communicating
with a non-TTY
terminal
TTY Full
For hearing/
speech impaired
text message transmission,
text message reception
operator required
TTY + Talk
For hearing
impaired
can talk
voice transmission, text
message reception
operator required
TTY + Hear
For speech
impaired
audible
text message transmission,
voice reception
operator required
1. TTY Full:
- Users who cannot talk or hear send and receive text messages through TTY equipment.
2. TTY Talk:
- Users who can talk but cannot hear receive text messages and send voice messages through
TTY equipment.
3. TTY Hear:
- Users who can hear but cannot talk send text messages and receive voice messages through
TTY equipment.
4. TTY Off:
- Users send and receive without TTY equipment.
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