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Method for offering TTY/TDD service in a wireless terminal and wireless terminal implementing the same

  • US 7,643,619 B2
  • Filed: 09/12/2005
  • Issued: 01/05/2010
  • Est. Priority Date: 12/28/2004
  • Status: Active Grant
First Claim
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1. A method of performing a Teletype/Telecommunications Device for the Deaf (TTY/TDD) service in a wireless terminal, the method comprising the step of:

  • changing all notice modes of the wireless terminal to a vibration mode when a user selects a TTY/TDD service mode by using a keypad;

    transmitting a call connection request signal if the user inputs a called party number and call key, and outputting a call connection request message together with an established first vibration to a TTY/TDD service window according to the call connection request;

    outputting a call ready message together with a second vibration different from the first vibration to the TTY/TDD service window if a call connection is performed after transmitting the call connection request message; and

    outputting an absence message together with a third vibration different from the first and second vibration to the TTY/TDD service window if a call connection is not performed after transmitting the call connection request message.

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