Telephones and TTY Phones: Coin- and credit card-operated telephones at O'Hare International Airport are located throughout each terminal. They comply with federal guidelines and are fully wheelchair accessible. Each bank of pay telephones is equipped with an amplified handset telephone for hearing impaired users. Operator-assisted Teletypewriters (TTY) are adjacent to the airport information booths on the lower level of Terminals One, Two, and Three and on the upper level of Terminal Five.