Digital Enhanced Cordless Telecommunications (DECT); Data Services Profile (DSP); Isochronous Data Bearer Services for Closed User Groups (Service Type D@ Mobility Class 1) (V1.1.1)
The present document specifies a profile for Digital Enhanced Cordless Telecommunications (DECT) systems conforming to ETS 300 175@ parts 1 to 7 [1] - [7]. It is part of a family of profiles aimed at the general connection of terminals supporting non-voice services to a fixed infra-structure@ private and public. The type D service@ mobility class 1@ as described in the ETR 185 [9]@ supports Isochronous Data Bearer Services (IDBSs) for Closed User Groups (CUGs) and is suitable for transparent transfer of isochronous data streams. It is intended for use in non-public applications. Video services and secure telephony services (end-to-end encrypted) over external networks can be considered as applications of IDBS. Phase 1 of the present document defines an unprotected service offering an unrestricted digital 32 kbit/s data bearer service and an unprotected single bearer@ multi-rate@ rate adaptation service to interwork to synchronous ITU Recommendations V.series services. Further Phases of this profile may additionally provide multiple rate@ multi-bearer support and error correction capability for services and applications requiring higher rates and high quality isochronous data transmission. The present document specifies the requirements on the Physical (PHL) layer@ Medium Access Control (MAC) layer@ Data Link Control (DLC) layer and Network (NWK) layer of DECT. The standard also specifies Management Entity (ME) requirements and generic Interworking Conventions (IC).