"The present document (part 1) specifies tests applicable to all Digital Enhanced Cordless Telecommunications (DECT) equipment accessing the DECT frequency band 1 880 MHz to 1 900 MHz (including provisions for testing other or extended frequency bands as described in ETSI EN 300 175-1 [i.11] and ETSI EN 300 175-2 [1]). Part 2 of the present multi-part deliverable [i.15] specifies tests applicable to DECT speech and audio transmission using a collection of speech codecs@ including Recommendation ITU-T G.726 [i.7] ADPCM codec@ Recommendation ITU-T G.722 [i.8] ""7 kHz codec""@ ""MPEG-4 codec"" [i.10] and others. The aims of the present document are to ensure: ? efficient use of frequency spectrum; ? no harm done to any connected network and its services; ? no harm done to other radio networks and services; ? no harm done to other DECT equipment or its services; ? interworking of terminal equipment via the public network. The tests of ETSI EN 300 176 are split into two parts: ? the present document (part 1) covers testing of radio frequency parameters@ security elements and those DECT protocols that facilitate the radio frequency tests and efficient use of frequency spectrum; ? part 2 [i.15] describes testing of speech and audio requirements between network interface and DECT PT@ or between a DECT CI air interface and alternatively a DECT PT or FT. Part 2 is not applicable to terminal equipment specially designed for the disabled (e.g. with amplification of received speech as an aid for the hard-of-hearing). DECT terminal equipment consists of the following elements: a) Fixed Part (FP); b) Portable Part (PP); c) Cordless Terminal Adapter (CTA); d) Wireless Relay Station (WRS) (FP and PP combined); e) Hybrid Part (HyP) (a PP with capability to act as a FP to provide PP to PP communication)."