scope:

This European Telecommunications Standard (ETS) describes the Stage 2 of the Cordless Terminal Handover Additional Network Feature (ANF-CTH) for a Private Integrated Services Network (PISN).

ANF-CTH is an additional network feature that enables a Cordless Terminal Mobility (CTM) user to maintain a call while moving between overlapping location areas belonging to the same visitor area.

This ANF is applicable to all circuit mode basic services as defined in ETS 300 171 [3].

NOTE 1: The HandOver (HO) procedures described in this ETS are only applicable on handover between location areas controlled by the same Private Integrated services Network eXchange (PINX).

Additional network feature specifications are produced in three stages according to the method specified in ENV 41005 [2]. This ETS contains the Stage 2 specifications of ANF-CTH. It identifies the Functional Entities (FEs) involved in the service and the information flows between them.

NOTE 2: The information flow across the air-interface is outside the scope of this ETS.

The purpose of the Stage 2 specification is to guide and constrain the work on signalling protocols at Stage 3, while fulfilling the requirements of Stage 1 of ETS 300 816 [6]. Stages 1 and 3 are defined in separate standards.

This ETS contains two Stage 2 specifications reflecting different ways of selecting the new location area: selection of the new location area by the CTM user and selection of the new location area by the network.

Conformance to this ETS is met by conforming to a Stage 3 standard which fulfils the requirements of this ETS that are relevant to the equipment for which the Stage 3 standard applies. Therefore no method of testing is provided for this ETS.