A data terminal suitable for home use and having the ability to communicate in both bit synchronous and character asynchronous formats is provided. When a user places a call to a database, the terminal automatically detects whether the database is operating in the bit synchronous or character asynchronous...http://www.google.de/patents/US4635275?utm_source=gb-gplus-sharePatent US4635275 - Method and apparatus for detecting synchronous or asynchronous data transmission
