Using lawful interception
Lawful Interception with Tmedia running Toolpack software is capable of performing lawful interception of calls, based on ETSI 201 671 v2-1-1 standard.
Functionality overview
Lawful interception will identify a call to intercept, and send the following information to one or multiple Law Enforcement agencies:
- information on an intercepted call (calling/called numbers, timestamps, call duration, etc.)
- audio from both directions of the call
Interception of a call is triggered by:
- A phone number to monitor
- A date/time period
A call that matches the number and the time period will be intercepted.
Toolpack implementation
With a Tmedia system running the Toolpack software (version 2.7 or above), lawful interception is triggered by a routing script. This script uses the information from a configuration file (csv format), to determine which phone number must be intercepted during which time period.
A call that matches the number and the time period will be intercepted.
During the interception, two outgoing calls toward an interception NAP will be placed, each containing a copy of the audio of one direction of the intercepted call. The specified NAP must be configured to point to the Law Enforcement Agency, generally using ISDN trunks.
In addition, information records (containing general call information like calling/called number, timestamps, and call duration, etc.) will be sent to the Law Enforcement Agency. That information is sent as data files (format specified by ETSI 201 671 v2-1-1) to a FTP server.
Information on the Law Enforcement Agencies (NAP to use, login information of the FTP server, and other parameters) can be configured in the Toolpack Web Portal. See the following page for more information: Configure Lawful Interception in Toolpack.
