In Messaging, the administrator installs the US English TTY language pack to provide the TTY support. The TTY prompts make most Messaging features available to users of TTY devices. Messaging users can send, receive, and respond to TTY messages with a TTY device. Users press the same telephone keys to send, receive, and respond to TTY messages and voice messages.
Use the TTY language for most Messaging menus, prompts, and messages.
Use Messaging to answer incoming telephone calls with a TTY greeting.
Callers can use the Messaging TTY or voice prompts when they record messages.
Messaging also supports the use of TTY and voice during the same call. For example, during a VCO session, a user can receive a prompt in TTY format and then record a voice message. Hearing impaired people who speak clearly can receive messages with a TTY device and send a voice message during the same call.