A method and apparatus for automatic callback used in an Advanced Intelligent Network (AIN). The system is particularly useful in the Personal Computer (PC) environment for guaranteed use of the next available channel to one of the modems of an Internet Services Provider (ISP). This invention makes use...http://www.google.com.au/patents/US6339640?utm_source=gb-gplus-sharePatent US6339640 - Method and apparatus for automatic callback in a telecommunication system