Messaging service interoperability methods. A client implements a messaging service version (X.Y), in which X is a major version number and Y is a minor version number. The client sends a PDU (Protocol Data Unit) with version (X.Y) to a server. If the PDU with version (X.Y) is not accepted by the server,...http://www.google.ca/patents/US7685291?utm_source=gb-gplus-sharePatent US7685291 - Messaging service interoperability methods and related devices
