Meetings
The ETSI TC-LI committee has three plenary meetings per year.
At a plenary meeting, delegates can officially submit change
requests to existing specifications. Additionally, new ideas
and requirements are regularly discussed.
If there are specific topics that require more in-depth
discussion, the committee organizes specific rapporteur
meetings at which the rapporteurs of specifications and
interested delegates join to have deep technical discussions.
Delegates in TC-LI represent
LEAs,
CSPs,
network vendors and lawful interception vendors.
Published specifications
ETSI TS 102 232: Lawful Interception
The de facto LI specification that details the
HI2 and
HI3 interfaces.
Read more about it in our
EVE explains article on ETSI TS 102 232.
ETSI TS 103 120: Warrant exchange
Defines an electronic interface for
HI1, the process
used for the exchange of warrant and other information between
LEAs and CSPs.
ETSI TS 103 221: X1/X2/X3
Replaces the proprietary X1/X2/X3 interfaces maintained by
the network vendors with a standardized approach.
Read more about it in our
EVE explains article on ETSI TS 103 221.
ETSI TS 101 331: LEA requirements
CSPs that are new to Lawful Interception can find a good
summary of LEA requirements in this specification. TC-LI
uses this as a baseline for the other specifications it
maintains.
Download the latest version from the ETSI website.
ETSI TS 102 657: Retained data
Defines the HI-A and HI-B interfaces. HI-A is used by an LEA
to submit a request for retained data to a CSP. In turn, when
a CSP has the requested data, it uses the HI-B interface to
deliver it.
A copy can be downloaded from the
ETSI website.
The legacy LI specification that details the interception of
telephony and mobile voice services using circuit-switched
networks.
Due to its legacy status, it will not be updated anymore but
a copy can be downloaded from the
ETSI website.