The present invention is a universal host-to-switch application program interface (API) utilizing a generic message format for performing call control processing and capable of being customized to meet telecommunications application and network signalling protocol requirements. The generic message formats...http://www.google.de/patents/US6134618?utm_source=gb-gplus-sharePatent US6134618 - Telecommunication switch having a universal API with a single call processing message including user-definable data and response message each having a generic format
