"The present document specifies a set of functionalities of the New Generation DECT. The New Generation DECT provides the following basic new functionalities: ? Wideband speech service (part 1 [21] of this multi-part deliverable). ? Packet-mode data service supporting Internet Protocol with efficient spectrum usage and high data rates (part 2 [i.4] of this mutli-part deliverable). ? Extended wideband speech services (the present document). ? Light Data Services: Software Update Over The Air (SUOTA)@ Content Downloading and HTTP based applications (part 4 [i.5] of this mutli-part deliverable). Additional functionalities of the New Generation DECT may be defined in the future in further parts of this multi-part deliverable@ or in different documents. All New Generation DECT devices will offer at least one or several of these services. The present document describes the part 3: Extended wideband speech services: ? For the description of the wideband speech service@ see TS 102 527-1 [21]. ? For the description of the support of transparent IP packet data@ see TS 102 527-2 [i.4]. ? For the description of the Light Data Services: Software Update Over The Air (SUOTA)@ Content Downloading and HTTP based applications@ see TS 102 527-4 [i.5]. The part 3 ""Extended wideband speech services"" is defined as an extension of part 1 of this mutli-part deliverable: ""Wideband speech service"" [21]. All devices compliant to part 3 specification (the present document) shall implement at least all mandatory features and may implement the optional features defined in part 1 ""Wideband speech""[21]. In addition to that@ the present document defines additional mandatory or optional features. The part 1 [21]@ and therefore part 3@ are also defined as extensions of the ""Generic Access Profile (GAP)"" [12]. All DECT devices offering Wideband speech services (part 1 or part 1 plus part 3) shall also be compliant with the ""Generic Access Profile (GAP)"" [12]@ and shall offer the DECT standard 32 kbit/s voice service according to GAP. All DECT devices claiming to be compliant with this Application Profile will offer at least the basic services defined as mandatory. In addition to that@ optional features can be implemented to offer additional DECT services. The aim of the present document is to guarantee a sufficient level of interoperability and to provide an easy route for development of DECT wideband speech applications@ with the features of the present document being a common fall-back option available in all compliant to this profile equipment."