Teletypewriter (TTY) machines are typewriter-style devices used by the hearing-impaired community to communicate over the phone. A TTY machine can work with VoIP, and the Telecommunications Relay Service (TRS), a free service that connects customers who are deaf, hard of hearing, or have speech disabilities with others using either standard phone equipment or phone equipment that has been specifically designed for individuals with disabilities.
Here are some things you’re going to want to check to help ensure that your TTY machine and TRS can work correctly with VoIP.
To use TTY/TRS with VoIP:
Caution: You can call 911 using TRS, but there may be a delay in reaching emergency services.
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