A voice-carry-over (VCO) phone is another telephone solution for individuals who are deaf. VCO is an option for people who use their own voice, but who cannot hear. For example, an individual who has lost hearing later in life may prefer to continue to use their own voice to talk to others on the phone. Using VCO, the person who is deaf places a call to the Telecommunications Relay Service. The relay operator types messages to the VCO user, and the VCO user responds to the voice caller with his or her own voice, instead of using a TTY.