Equally acceptable is typing XXX several times directly after the mistake and then retyping the word. If a misspelled word can be understood within the context of the sentence, it need not be retyped. Many deaf and hard of hearing TTY users rely on flashing lights to alert them to ringing phones.
Flashers can take longer than sound to attract attention.
Callers should identify themselves at the beginning of calls. Any other people who may be watching the conversation also should be identified. If the message is garbled, hit the space bar a few times. If this does not clear up the message, both parties should hang up and try the call again. Tips for educators TTYs make it possible for teachers in postsecondary educational settings to notify deaf or hard of hearing students of any class changes or cancellations.