Intercept Related Information - Revision history

William Wong: Redirected page to Lawful Interception#IRI records

2016-10-18T10:14:26Z

Redirected page to Lawful Interception#IRI records

William Wong: Redirected page to Lawful Interception

2016-10-12T08:45:46Z

Redirected page to Lawful Interception

William Wong at 10:16, 3 October 2016

2016-10-03T10:16:18Z

William Wong at 10:13, 3 October 2016

2016-10-03T10:13:31Z

William Wong at 10:10, 3 October 2016

2016-10-03T10:10:09Z

William Wong at 10:08, 3 October 2016

2016-10-03T10:08:49Z

William Wong at 10:07, 3 October 2016

2016-10-03T10:07:28Z

William Wong at 10:06, 3 October 2016

2016-10-03T10:06:36Z

William Wong at 10:04, 3 October 2016

2016-10-03T10:04:27Z

William Wong at 10:02, 3 October 2016

2016-10-03T10:02:46Z

← Older revision		Revision as of 10:14, 18 October 2016
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−	#REDIRECT [[~~Lawful Interception~~]]	+	#REDIRECT [[Lawful_Interception#IRI_records\|IRI]]

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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==
-−
-* Lawful Interception, a feature as provided by service providers, requires law enforcement agency to first meet Lawful Interception Requirements by providing:
-** A list of targets
-*** Type of intercepted targets can be from: PSTN, ISDN, GSM (CS), TETRA, GPRS (PD), UMTS (CS)
-** LIID (unique identifier) for the target
-** Phone number (calling or called number) of the target
-** Start/end date and time for the interception
-* Service provider updates targets list in it’s equipments
-* The equipments detect a matching calling or called number, and activates the interception
-* Lawful Interception, then allows law enforcement agencies to intercept calls
-** By receiving a copy of the audio of both parties, through CC link  (forked call) which is a call toward the agency, carrying intercepted audio
-** By receiving call information records (or IRI records)
-* Intercept Related Information record (IRI record) is a CDR-style record that contain IRI information on an intercepted call
-−
-==IRI records generating==
-−
-[[Image:Lawful-intercept-details.png|thumb|360px|Schematic showing interception of a call already routed with a Tmedia]]
-−
-* IRI records are generated at various states of the interception
-* They provide information on the interception, and call state
-* In a call, each call leg can be an interception target
-* When a leg is an interception target, it’s intercepted:
-** Audio «from» this leg is forked to a new outgoing call toward the agency
-** Audio «to» this leg is forked to a new outgoing call toward the agency
-** IRI records are generated for this interception
-* Both legs may be independently and simultaneously intercepted
-** 2 pairs of forked audio outgoing calls
-** 2 sets of IRI records
-−
-==Types of IRI records==
-−
-* Start:  Indicate that the interception is starting at first event of the communication attempt
-* Continue: Indicate call state change at any time during the communication (attempt)
-* End:  Indicate the end of the interception at the end of the communication (attempt)
-* Report: For any non-communication related events
-−
-===Typical information found in an IRI record===
-−
-* Record type (Start, Continue, End, Report)
-* LIID (unique identifier of the intercepted target assigned by an agency)
-* CIN (communication identity number)
-* Operator identifier
-* Direction (target is originating, or terminating)
-* Call state (idle, setup, connected)
-* Duration of ring and conversation states
-* Calling / called party numbers
-* Release reason
-* CC link state (setup, active, released, lack of resources)
-* CC link release reason
-−
-==IRI records encoding==
-* IRI records are encoded in ASN.1 format
-* ASN.1 IDs and objects hierarchy for encoding IRI records is provided by ETSI specifications
-−
-==IRI records values and files specification==
-* IRI records values can be
-** Mandatory in each record
-** In one record only for the whole call
-** optional (in some records only, or none at all)
-* IRI record files can
-** Contain only one IRI record (one file per record)
-** Contain multiple IRI records (grouped)
-−
-==IRI records uploading to the agency==
-* As files, using the FTP protocol
-* Telcobridges supports SFTP as file transfer method as well
-−
-−
-== References ==
-−
-[http://en.wikipedia.org/wiki/Lawful_interception Wikipedia lawful intercept article]
-−
-[[category:Tmedia_Features]]
-[[category:Needs revising]]

@@ Line 5: / Line 5: @@
 * Lawful Interception, a feature as provided by service providers, requires law enforcement agency to first meet Lawful Interception Requirements by providing:
 ** A list of targets
 ** LIID (unique identifier) for the target
 ** Phone number (calling or called number) of the target

@@ Line 3: / Line 3: @@
 ==IRI records==
-* Lawful Interception, a feature as provided by service providers, requires law enforcement agency to furst meet Lawful Interception Requirements
+* Lawful Interception, a feature as provided by service providers, requires law enforcement agency to first meet Lawful Interception Requirements by providing:
-** Law enforcement agency provides a list of targets
+** A list of targets
 ** LIID (unique identifier) for the target
 ** Phone number (calling or called number) of the target
 ** Start/end date and time for the interception
-** Service provider updates targets list in it’s equipments
+* Service provider updates targets list in it’s equipments
-** The equipments detect a matching calling or called number, and activates the interception
+* The equipments detect a matching calling or called number, and activates the interception
-* Lawful Interception, allows law enforcement agencies to intercept calls
+* Lawful Interception, then allows law enforcement agencies to intercept calls
 ** By receiving a copy of the audio of both parties, through CC link  (forked call) which is a call toward the agency, carrying intercepted audio
 ** By receiving call information records (or IRI records)

@@ Line 3: / Line 3: @@
 ==IRI records==
-* Lawful Interception, a feature as provided by service providers, requires law enforcement agency to furst meet Lawful Interception Requirements:Law enforcement agency provides a list of targets
+* Lawful Interception, a feature as provided by service providers, requires law enforcement agency to furst meet Lawful Interception Requirements
-*** LIID (unique identifier) for the target
+** Law enforcement agency provides a list of targets
-*** Phone number (calling or called number) of the target
+** LIID (unique identifier) for the target
-*** Start/end date and time for the interception
+** Phone number (calling or called number) of the target
-*** Service provider updates targets list in it’s equipments
+** Start/end date and time for the interception
-*** The equipments detect a matching calling or called number, and activates the interception
+** Service provider updates targets list in it’s equipments
 * Lawful Interception, allows law enforcement agencies to intercept calls
 ** By receiving a copy of the audio of both parties, through CC link  (forked call) which is a call toward the agency, carrying intercepted audio