Patent ID: 7920542

Claim:
A system for providing voice over internet protocol service to a user domain comprising user accessible equipment, the system comprising: a first domain comprising voice over internet protocol service provider equipment configured to support a signaling protocol comprising at least a session initiation protocol signaling protocol; a second domain comprising at least one border element communicating with the service provider equipment and the user accessible equipment to enable communications between the voice over internet protocol service provider equipment and the user accessible equipment, each of the at least one border element configured to translate at least one non-session-initiation protocol signaling protocol to the session initiation protocol signaling protocol; wherein the user accessible equipment is prevented from directly communicating with the service provider equipment; wherein the at least one border element is configured to: monitor first requests received from the user accessible equipment; determine whether a volume of the first requests is normal or excessive; transmit the first requests to the first domain when the volume of the first requests is normal; and terminate transmission of the first requests to the first domain when the volume of the first requests is excessive; and wherein the at least one border element is configured to: handle transactions between an application server in the first domain to a database stored in the user domain, the transactions comprising: receiving second requests from the application server; transmitting the second requests received to the database; receiving responses from the database; and transmitting the responses received to the application server; determine whether a transaction is normal or abnormal; complete the transaction when the transaction is normal; and terminate the transaction when the transaction is abnormal.