A method and apparatus providing interconnectivity between several telephone networks. The apparatus receives a telephone transaction initiation message that originated with a telephone set located in a first network. The initiation message bears an originator's registration number identifying a subscriber...http://www.google.fr/patents/US7649908?utm_source=gb-gplus-shareBrevet US7649908 - Conveying transactional messages for GSM mobile operators over two disparate networks
Conveying transactional messages for GSM mobile operators over two disparate ...
