The present document specifies that set of technical requirements for Digital Enhanced Cordless Telecommunications (DECT) Fixed Part (FP) and DECT Cordless Terminal Adapter (CTA) necessary for the support of the Radio in the Local Loop (RLL) Access Profile (RAP). The objective of the present document is to ensure the air interface nteroperability of DECT RAP CTAs and DECT RAP FPs and Wireless Relay Stations (WRS) if applied.