A system performs an electronic surveillance in a packet-switched network.
The system includes a first card (300), a second card (400), and an
electronic surveillance device (120). The first card (300) stores first
data identifying a first operational mode and second data identifying a
time period. The second card (400) stores activation information. The
electronic surveillance device (120) reads the first card (300) and
conditions itself for operating in the first operational mode for the
specified time period. The electronic surveillance device (120) also
reads the second card (400) and performs a packet capture operation in
accordance with the first operational mode for the specified time period
in response to reading the second card (400).