| 摘要 |
A method of conducting covert surveillance of a subject is provided for within a telecommunications network. The surveillance includes surveillance of a monitored call connected over the network, the monitored call being between the subject and an associate and including circuit-switched or packet-switched call content, i.e., bearer traffic exchanged between the subject and the associate. The method includes: clandestinely receiving the circuit-switched or packet-switched call content; converting the received circuit-switched call content into a packet-switched format; and, delivering the call content in the packet-switched format to a designated law enforcement agency over a packet-switched data network.
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