SIST-TP TR 101 772 V1.1.2:2004

SIST-TP TR 101 772 V1.1.2:2004 is the Slovenian version of ETSI TR 101 772 V1.1.2 for Telecommunications and Internet Protocol Harmonization Over Networks (TIPHON) Release 3. It defines top-level lawful interception (LI) requirements in a TIPHON environment and describes the internal LI interface needed for that function. The document is for people designing, implementing, or assessing TIPHON networks and the access technologies that carry intercepted traffic.

What does SIST-TP TR 101 772 V1.1.2:2004 specify?

SIST-TP TR 101 772 V1.1.2:2004 specifies the top-level requirements for LI in a TIPHON environment, based on TIPHON TR 101 750 recommendations. It focuses on the LI interface and the way interception fits TIPHON’s split between service and transport.

Clause 1 states the scope, Clause 2 lists the reference documents, Clause 3 gives definitions and abbreviations, and Clause 4 gives the technical overview. Annex A is a bibliography, and the document history records the publication trail.

In practice, this means the report is a design and alignment document rather than a detailed implementation guide. It frames how LI should be understood across TIPHON and related access networks.

What are the key requirements of SIST-TP TR 101 772 V1.1.2:2004?

The most important points are in Clause 1, Clause 4, and Table 1. They explain where LI sits in TIPHON, which access technologies were already covered, and how target identity depends on the network.

• The document is based on the recommendations in TR 101 750 [2]. This ties the LI view to earlier TIPHON security studies, so readers can trace the assumptions behind the requirements.
• TIPHON separates service provision from transport provision. In practice, a user can register from any geographical location and use any access network, so LI planning cannot rely on a single access method or location.
• LI of the media stream is provided by the transport plane. That matters because interception may need to be placed in the access network used by the target or in another network that carries the target traffic.
• The target can be identified through the TIPHON application plane, while transport identities may not reveal the service identity. This means implementers must map service-side and transport-side identities carefully.
• Table 1 lists the access technologies for which LI requirements are defined: GPRS, GSM, ISDN, PSTN, TETRA, and UMTS. It also lists the target identities used for each, which is important when deciding what identifier to intercept.
• The table note says more than one identity may be intercepted at the same time. In practice, an interception order may apply to a subscriber, a terminal, or a directory number depending on the technology.
• Requirements are not yet specified for xDSL access and dedicated circuits such as leased lines. Readers should treat those as outside the defined coverage of this report.
• Where circuit-switched technologies carry IP packets, for example IP over ISDN, the circuit-switched technology shall provide LI. That means interception must still work even when the payload is IP.

What terms does SIST-TP TR 101 772 V1.1.2:2004 define?

• Access provider - the provider that gives a user terminal access to a network.
• Lawful Interception (LI) - interception handled under the legal and technical framework discussed by the report.
• International Mobile Subscriber Identity (IMSI) - a subscriber identity used in mobile networks.
• International Mobile Equipment Identity (IMEI) - an equipment identity used to identify a mobile terminal.
• Mobile Subscriber International Services Directory Number (MSISDN) - the telephone number used as a target identity in several access technologies.
• Individual TETRA Subscriber Identity (ITSI) - the subscriber identity used in TETRA interception cases.
• TETRA - Terrestrial Trunked Radio, one of the access technologies covered.
• Universal Mobile Telephone Service (UMTS) - the mobile system named in the document’s abbreviation list.

Who uses SIST-TP TR 101 772 V1.1.2:2004?

SIST-TP TR 101 772 V1.1.2:2004 is used by telecom operators, access providers, network architects, security engineers, and LI system integrators working on TIPHON and related networks. It is also useful for vendors and testers who need to map interception functions to GSM, GPRS, ISDN, PSTN, TETRA, or UMTS access.

In practice, these users apply the report when choosing interception points, selecting target identities, and checking how LI should work across service and transport domains. It also helps teams compare TIPHON LI needs with related ETSI LI specifications.

What changed in SIST-TP TR 101 772 V1.1.2:2004 from the previous edition?

The history lists an earlier publication, V1.1.1 in April 2001, and the present publication, V1.1.2 in December 2001. The document does not add a change summary in the extracted material, so the visible revision trail is the main published difference.

Which standards are used with SIST-TP TR 101 772 V1.1.2:2004?

• ETSI ETR 331 - gives user requirements for LI from the law enforcement agency perspective.
• ETSI TR 101 750 - provides the TIPHON security study that this report builds on.
• ETSI ES 201 671 - specifies the LI handover interface for telecommunications traffic.
• ETSI ES 201 158 - gives LI requirements for network functions.
• ETSI TS 101 509 - provides LI stage 2 requirements for GSM/GPRS-related interception.
• ETSI EN 301 040 - gives the LI interface for TETRA.
• ETSI TS 133 107 - gives LI architecture and functions for UMTS.

What does the SIST-TP TR 101 772 V1.1.2:2004 document contain?

The document contains a scope, reference list, definitions and abbreviations, and a technical overview. Clause 4 discusses TIPHON’s service and transport separation and explains where LI sits in that architecture.

It also includes a figure showing service capabilities interworking across domains. Table 1 maps access network technologies to the related LI specification and the target identities used in each case.

Annex A provides the bibliography, including a Council Resolution on lawful interception and the TIPHON network architecture reference.