Method for performing lawfully-authorized electronic surveillance

摘要

Lawfully-authorized electronic surveillance is performed. A call associated with a first party to be surveilled is verified, on a per-call basis. Packets associated with the call are sent to a second party. Copies of the packets are sent to a surveillance receiver.

主权项

1. A method, comprising:
opening a gate for electronic surveillance of a call from a calling address to a called address; establishing a timer associated with the gate; routing packets of data associated with the call between the calling address and the called address; sending copies of the packets of data to a surveillance receiver that performs the electronic surveillance of the call; monitoring for receipt of an acknowledgment of the gate as the timer counts; determining an expiration of the timer without the receipt of the acknowledgement; terminating the gate in response to the expiration of the timer without the receipt of the acknowledgment; and terminating the electronic surveillance of the call in response to the expiration of the timer without the receipt of the acknowledgment.