If you can speak clearly but you must use a teletypewriter (TTY) to see what another person is saying, you can request Voice Carry Over (VCO) by contacting us. VCO allows you to speak for yourself, while a relay operator types what another person says to you.
If you can hear but you must use a teletypewriter (TTY) to type what you need to say, you can request Hearing Carry Over (HCO) by contacting us. HCO allows you to hear what another person is saying, while a relay operator speaks for you by reading what you type to the other person.