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| The call data (known as Intercept Related Information or [[IRI]] in Europe and Call Data or CD in the US) consists of information about the targeted communications, including destination of a voice call (e.g., called party’s telephone number), source of a call (caller’s phone number), time of the call, duration, etc.
| | #REDIRECT [[Lawful_Interception#IRI_records|IRI]] |
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| ==IRI Records==
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| * Lawful Interception, a feature as provided by service providers to law enforcement agencies, allows law enforcement agencies to intercept calls
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| ** By receiving a copy of the audio of both parties
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| ** By receiving call information records (or IRI records)
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| * Intercept Related Information Record (IRI record) is�a CDR-style record that contain IRI information on an intercepted call
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| [[Image:Lawful-intercept-details.png|thumb|360px|Schematic showing interception of a call already routed with a Tmedia]]
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| Lawful interception will identify a call to intercept, and send the following information to one or multiple Law Enforcement agencies:
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| * information on an intercepted call (calling/called numbers, timestamps, call duration, etc.)
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| * audio from both directions of the call
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| Interception of a call is triggered by:
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| * A phone number to monitor
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| * A date/time period
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| A call that matches the number and the time period will be intercepted.
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| ==Toolpack Implementation==
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| 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.
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| A call that matches the number (calling or called number) and the time period will be intercepted.
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| 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.
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| In addition, information records (containing general call information like calling/called number, timestamps, and call duration, etc., this information is called [[Intercept Related Information]] ([[IRI]]) records) 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 (Toolpack also supports SFTP for more security).
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| Lawful Intercept configuration (NAP to use, login information of the FTP/SFTP server, target numbers to intercept, etc.) can be configured in the [[Toolpack]] Web Portal.
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| ==H.248 Implementation==
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| Lawful Interception is also supported using H.248 interface.
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| == Configuration ==
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| *[[Toolpack:Lawful_Interception_Settings_B|Toolpack v2.9: Lawful Intercept]]
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| *[[Toolpack:Lawful_Interception_Settings_A|Toolpack v2.8: Lawful Intercept]]
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| *[[Web_Portal_Tutorial_Guide_v2.7#Lawful_Interception|Toolpack v2.7: Lawful Intercept]]
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| == References ==
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| [http://en.wikipedia.org/wiki/Lawful_interception Wikipedia lawful intercept article]
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| [[category:Tmedia_Features]]
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| [[category:Needs revising]]
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