The present document specifies the Digital Enhanced Cordless Telecommunications (DECT) access protocols and
Fixed Part (FP) and Portable Part (PP) interworking/mappings necessary to ensure that the Global System for Mobile
communications (GSM) basic voice telephony service can be provided over DECT. To enable DECT terminals to
interwork with DECT systems which are connected to the GSM infrastructure, from the DECT side the present
document is based on EN 300 444 [10] and on the DECT Common Interface specification EN 300 175 parts 1 to 8
[1] to [8] (for the cases not covered by Generic Access Profile (GAP)), from GSM side the present document assumes
interworking with GSM Public Land Mobile Network (PLMN) phase 2.
An air¿interface profile is specified for a particular set of GSM services so that inter¿operability of DECT equipment
for these services can be achieved. Interworking functions/mappings are specified for Mobile Switching Centre (MSC)
attachment for the DECT FP as the FP is using the A¿interface towards the GSM MSC in the respect that the FP
emulates a GSM Base Station Controller (BSC) with regards to the GSM messages which are relevant to the present
document. Interworking functions/mappings for the PP are specified for MSC environment.
The provision of the GSM Subscriber IdentityModule (SIM) and DECT Authentication Module (DAM) with the GSM
Application (GA) within the DECT portable are also considered.
The present document covers a subset of ETS 300 557 [18] and ETS 300 590 [19] procedures as far as mapping is
concerned and as far as this is required for support of 3,1 kHz speech service.
GSM functions of ETS 300 590 [19] which, in a DECT/GSM context, are relevant at the A-interface only, are out of the
scope of the present document, as well as interfaces to non-GSM networks.
Specific interworking procedures/mappings for the support of supplementary services, data services, short message
(...abbreviated)