If you are Deaf or severely Hard of Hearing and need to communicate with a hearing person on the phone, the Teletypewriter (TTY) will allow you to type information with a TTY.
Are you Hard of Hearing and having troubles hearing the person calling on the phone? Do you have the phone volume amplified as loud as it will go? A Voice Carry Over (VCO) phone may be what you need to keep in touch with family and friends.
Can you hear the caller on the phone but can not speak back to them because of a medical condition? The Hearing Carry Over (HCO) phone will be the answer you have been looking for. Use a Teletypewriter (TTY) to type what you need to say.
All calls can be made through an analog phone line or compliant digital cell phone, with the toll-free relay service, relay operator and delivered for free by your phone provider.