Patent ID: 8406381

Claim:
A computer-implemented method, comprising: receiving a call preemption request from a law enforcement agency (LEA) designating at least one subscriber telephone number and at least one LEA telephone number, wherein the at least one subscriber telephone number is associated with a voice over Internet protocol (VoIP) calling plan subscriber; generating, at a voice application server, an incoming call policy configured to allow incoming calls to the at least one subscriber telephone number from only the at least one LEA telephone number; storing the incoming call policy in a memory associated with the voice application server; activating the incoming call policy; generating, at the voice application server, an outgoing call transfer policy configured to automatically transfer all outgoing calls from the at least one subscriber telephone number to a designated one of the at least one LEA telephone numbers; storing the outgoing call transfer policy in the memory associated with the voice application server; activating the outgoing call transfer policy; receiving, at the voice application server, an incoming call request for the at least one subscriber telephone number; determining whether a calling number associated with the incoming call request matches one of the at least one LEA telephone numbers; and blocking the incoming call request when the calling number associated with the incoming call request does not match one of the at least one LEA telephone numbers.