scope:

The present set of documents specify IPCablecom, a set of protocols and associated element functional requirements. These have been developed to deliver Quality of Service (QoS), enhanced secure IP multimedia time critical communication services, using packetized data transmission technology to a consumer's home over a cable television Hybrid Fibre/Coaxial (HFC) data network.

NOTE 1: IPCablecom set of documents utilize a network superstructure that overlays the two-way data-ready cable television network, e.g. as specified within ES 201 488 [6] and ES 200 800 [7].

While the initial service offerings in the IPCablecom product line are anticipated to be Packet Voice and Packet Video, the long-term project vision encompasses a large family of packet-based services. This may require in the future, not only careful maintenance control, but also an extension of the present set of documents.

NOTE 2: The present set of documents aims for global acceptance and applicability. It is therefore developed in alignment with standards either already existing or under development in other regions and in International Telecommunications Union (ITU).

The present document of the above mentioned series of ETSI deliverables specifies the interception of those multi-media services carried over the network defined in the remainder of the above mentioned series of ETSI deliverables that do not fall into the interception domain covered by sub-part 1 of TS 101 909-20-1 [5].

The present document describes the implementation of a Lawful Interception (LI) interface in an IPCablecom system. It provides the requirements and specification of the interface within an IPCablecom system for the purpose of providing data to Law Enforcement Agencies (LEAs) in the area of (LI) of communications.

The provision of a (LI) interface for IPCablecom is a national option, however where it is provided it shall be provided as described in the present document.

The structure of (LI) in telecommunications is in two parts: The internal interface of a network that is built using a particular technology; and, the external interface (known as the Handover Interface) that links the LEA to the network. Between these two parts may lie a mediation function to cater for national variances and delivery of the result of interception.

The Handover Interface is specified in TS 102 232 [11] and TS 102 234 [10]. In addition, the Handover Interface may be the subject of national regulation and therefore the mediation function may also be a matter of national regulation.

The subject of the present document is the internal LI interface that lies between the IPCablecom infrastructure and the mediation function.

The present document describes the data content of information flows from the IPCablecom system to the mediation function. The present document is structured as follows:

• clause 4 describes the IPCablecom architecture and services to which LI applies;

• clause 5 presents architecture for LI in an IPCablecom system;

• clause 6 presents the data model and behaviour for interception of signalling;

• clause 7 presents the data model and behaviour for interception of the content of communication;

NOTE 3: The content of communication in IPCablecom is an IP packet.

• clause 8 presents the security provisions for LI;

• the annexes provide illustrations of the management of LI in an IPCablecom environment.

The present document applies to IPCablecom services where access to the communication of IPCablecom users is available in a network, and where the services being intercepted do not include the PSTN/ISDN emulation services whose interception is described in TS 101 909-20-1 [5].

The present document does not describe the means of transporting data from the IPCablecom network to the LEA, but describes only the means of capturing and encoding the activities of a target within the IPCablecom network and delivering this data to the mediation function.

The present document does not define the operations or technical requirements of the Handover Interface that takes data from the mediation function to the LEMF.

The present document does not define the operations or technical requirements of the Law Enforcement Monitoring Facility (LEMF).

NOTE 4: No test point is provided in the present document to ensure conformance.