l Property I, L.P.Region-wide messaging system and methods including validation of transactionsUS7945038Oct 30, 2009May 17, 2011At&T Intellectual Property I, L.P.Methods and systems for releasing a voice mail system from a communication and further processing the communicationUS8036345Dec 14, 2006Oct 11, 2011At&T Intellectual Property I, L.P.Voice mailbox with management supportUS8111816Feb 5, 200