US Patent 6885731 Captioned telephone with emergency access feature

Captioned telephone are devices intended to provide text captions to persons needing assistance with telephone communications. Captioned telephones provide text by using the services of a relay interposed between the assisted user and the hearing user, the relay providing the captioning for the assisted user. In normal operation, when the assisted user dials a number, the captioned telephone dials the relay which in turn dials the other party to the call. Here a method for operating a captioned telephone is disclosed where the captioned telephone monitors the number being called by the assisted user and, if the user is dialing emergency services (9-1-1 in the U.S.), the call to the relay is terminated and a direct connection to emergency services is initiated. This method is intended to provide the quickest and most error-free connection of the user to emergency services.