 A Packet Capture Appliance intercepts these packets, so that they may be examined and analyzed.Computer technology is needed to perform traffic analysis and sift through intercepted data to look for important/useful information.Under the Communications Assistance For Law Enforcement Act, all U.S. telecommunications providers are required to install such packet capture technology so that Federal law enforcement and intelligence agencies are able to intercept all of their customers' broadband Internet and voice over Internet protocol (VoIP) traffic.