scope:

This European Telecommunication Standard (ETS) describes the stage two of the Cordless Terminal Mobility (CTM) call handling services for Private Integrated Services Networks (PISNs). It comprises two related but distinct service descriptions, CTM Incoming Call Handling Additional Network Feature (ANF-CTMI) and CTM Outgoing Call Handling Additional Network Feature (ANF-CTMO).

ANF-CTMI directs incoming calls to a CTM user within a PISN regardless of the CTM user's geographical location within the PISN, provided the CTM user's location is known.

ANF-CTMO detects an outgoing call or request for a supplementary service from a CTM user and establishes it as a basic call or signalling connection, respectively, regardless of the user's geographical location within the PISN. It also provides the CTM user's service profile for use by outgoing call control, or alternatively passes the call to the CTM user's home location for processing.

These ANFs are applicable to all circuit-mode basic services as defined in ETS 300 171 [1].

This ETS contains the stage 2 specifications of ANF-CTMI and ANF-CTMO. It identifies the functional entities involved in the feature and the information flows between them. The specification of information flows between the PISN and cordless terminals is beyond the scope of this ETS. ANF specifications are produced in three stages according to the method specified in ETS 300 387 [4].

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. Stage 1 and stage 3 are defined in separate standards.

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.