Vorlage 3b

RoleRole: CSP: CSP RoleRole:: CSPCSP--toto-- PTSS RoleRole:: PTSS DN ProviderDN Provider

TRTROA HandoverHandover LILI Point (HP)Point (HP) LILI TechVTSTS DeliveryDelivery DD StackStack && SS FormatsFormats FF

CSPCSP--toto--PTSS LEMFLEMF ServiceService DeliveryDelivery

CSPCSP‘’ss AccessAccess

NetworkNetwork PointPoint NetworkNetwork

NetworkNetwork HPHPHP NN NN HPHPHP NN ProtocolProtocol PP PP PP StackStack SS SS SS

Annex 3 Connection DN Agreement

Figure 3 Roles, protocol stacks and handover points between the CSP and the PTSS

Figure 3 shows the layers delivery networks and lawful interception formats. Delivery networks are transparent for lawful interception formats, i.e. they do not check or change the interception data delivered. Furthermore, Figure 3 shows the relationship between the CSP and the PTSS in accordance with the Swiss LI reference model. For the purposes of this document, only the CSP-to-PTSS delivery network and the corresponding handover points are of relevance.

CSP-to-PTSS delivery is ensured by various roles in different network sections. Handover points exist between the various roles.

A distinction is made between handover points at the level of:

a. Delivery networks (DN-HP), and

b. Lawful interception formats (LI-HP), i.e. LI-specific information (CC, Calling/Called Subaddress field when setting up CC links, IRI formats).

The DN-HP and the LI-HP may be coincident. This is the case at the CSP end in Figure 3. Elsewhere (e.g. in the CSP’s network), the DN-HPs are associated with a Service Access Point (SAP) between a delivery network layer (Network Service Provider) and a lawful interception layer (Network Service User).

Moreover, individual connection agreements are drawn up as bilateral documents between the PTSS and each CSP connected to the DN. Each bilateral connection agreement defines the