Projet 2a

Technical requirements for the handover interfaces for the execution of telecommunications surveillance

Clause Selection of ETSI options for Additional requirements ETSI TS Switzerland

101 671

V3.12.1

As an alternative to the Bearer Capability (BC) of the value “UDI”, the BC can take the value used in the intercepted call, the choice being a CSP option.

A.4.2 Delivery of packetized Content of Communication

For SMS and UUS Services, CC will

be transferred as IRI.

For transferring CC data, the ASN.1

module ‘HI2Operations’ according to

ETSI TS 101 671 V3.12.1 Annex D.5

shall be used.

A.4.3 Control information for circuit switched Content of Communication

The terminal end point of PTSS

replies to a SETUP message

immediately with a CONNECT

message, i.e. without any ALERTING

message.

A.4.5 Security requirements at the interface port HI3

ISDN Service specifications CLIP and CUG does not need to be implemented. COLP must be used for creating the

CC links to the LEMF.

A.4.5.3 Authentication

A special authentication procedure

within the ISDN B Channel or within

the Subaddress is not used.

A.5.4 Multi party calls – general principles

Only option A is available and must

be used.

A.6.3 Call Hold/Retrieve

If an active call is put on hold, its CC

link shall stay intact and the signal

from the held party shall be switched

through to the LEMF. If the target

sets up a new call, while one call is

on hold, this call shall be treated as a

normal originating call (additional CC

link) ETSI TS 101 671 V3.12.1 Annex

A.6.3.1 applies. CC links shall stay

intact and the signal from the held

party shall be switched through.

A.6.4 Explicit Call Transfer (ECT)

For explicit call transfer, option 2

must be implemented. This means,