Patent ID: 7912189
Filing Date: 2011-03-22
Classification: H04M

Abstract:
1. A method comprising: detecting a network communication interruption between a branch office and a main office; provisioning a mailbox of a failover voice messaging system of the branch office; receiving an incoming call at the branch office; routing the incoming call to the mailbox; storing a message associated with the incoming call in the mailbox; detecting a restored network connection between the branch office and the main office; synchronizing the message between the mailbox of the failover voice messaging system of the branch office and a corresponding mailbox of a voice messaging system of the main office in response to the restored network connection; registering a telephone of the branch office with a failover call management server of the branch office in response to the network communication interruption, wherein the mailbox of the failover voice messaging system is associated with the telephone; provisioning an additional mailbox of the failover voice messaging system of the branch office; registering an additional telephone of the branch office with the failover call management server of the branch office in response to the network communication interruption, wherein the additional mailbox of the failover voice messaging system is associated with the additional telephone; receiving an additional incoming call at the branch office; routing the additional incoming call to the additional mailbox; storing an additional message associated with the additional incoming call in the additional mailbox; and synchronizing the additional message between the additional mailbox of the failover voice messaging system of the branch office and a corresponding additional mailbox of the voice messaging system of the main office in response to the restored network connection.