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Content for  TS 33.107  Word version:  16.0.0

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5A  X Interfaces |R15|Word‑p. 40

5A.1  General

X interfaces as defined in clause 4 and used throughout the present document, are used to control interception (X1), transport intercepted IRI (X2) and CC (X3) to the MF/DF. This clause defines the use of standardised X interfaces.
X1, X2 and X3 as defined in the present document shall support the requirements in clause 5A.2, 5A.3 and 5A.4.
When circuit switched services defined in clause 6, are supported, requirements in 5A.2, 5A.3, and 5A.4 are optional for CS functions defined in clause 6.
ADMFs, MFs/DFs and points of interception (e.g. ICEs) may support already existing proprietary X interfaces.
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5A.2  X1

5A.2.1  General

The X1 interface is used to activate, manage and terminate interception as defined in clause 5. The present document defines three X1 interfaces as follows:
X1_1 between the ADMF and the points of interception;
X1_2 between the ADMF and the MF/DF2;
X1_3 between the ADMF and the MF/DF3.
X1_1, X1_2, X1_3 shall support the use of ETSI TS 103 221-1 [89] for transport of X1 messages / information. However, default configurations, information element formats and other parameters as defined in the present document shall apply regardless of generic default options specified in TS 103 221-1 [89].
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5A.2.2  X1 Detail

Editor's Note: This clause will define 3GPP specific use of TS 103 221-1 [89], including header parameters, mandatory parameters and other 3GPP specific issues. X1 message contents are defined in applicable service specific sections.

5A.3  X2Word‑p. 41

5A.3.1  General

The X2 interface is used to transport IRI from the point of interception to the MF/DF2. In the present document, service specific IRI required to be transported over the X2 interface is defined in subsequent network access or service clauses.
Support for fully standardised X2 is not defined in the present document.

5A.4  X3

5A.4.1  General

The X3 interface is used to transport CC from the point of interception to the MF/DF3. In the present document, service specific CC required to be transported over the X3 interface is defined in subsequent network access or service clauses.
Support for fully standardised X3 is not defined in the present document.

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