03.543GPPDescription for the use of a Shared Inter Working Function (SIWF) in a GSM PLMNStage 2TS
The service definition (stage 1) on Lawful Interception (GSM 02.33) states that all tele and bearer services are subject to interception.
Provided that a mechanism for the interception of dataservice exists, interception is supported for both Loop or Non Loop method.
Annex A (informative):
Change Request History
Definition of visited MSC
Clarifications of ISUP procedures
Number of MSCs that can access an SIWF
Clarification on the MAP Dialogue
Correlation of ISUP messages
Dedicated services (BS4x or BS5x) should not be restricted to the non loop method
RR parameters over the K-interface
Release 1997 version
Release 1998 version