CallTTY A program to communicate with phone TTY/TDD devices via a sound card Platforms: Windows 95/98/Me/NT/2000/XP     Size: 693 K     Cost: $25 Get the full version     Trial version     Developer's Website Contacting third-party download site please wait. If your download does not start, click here, or get the full version Descriptions CallTTY: A program to communicate with phone TTY/TDD devices (Telecommunications Devices for the Deaf) via a sound card, without TTY modem. A simple interface between sound card and phone line or acoustic connection with phone handset are used.