Describes the Abstract Test Suites (ATS) and partial IXIT proforma for the Network Layer (Layer 3) at the mobile radio interface of the GSM/3GPP mobile stations (MS) conforming to the TSs for Layer 3, cell selection, Enhanced Full Rate Speech, Multi-band, GSM-R band (R-GSM) and ASCI (the voice group call service (VGCS), voice broadcast service (VBS), enhanced Multi-Level Precedence and Pre-emption service (eMLPP), User-to-user Signalling (UUS) service and the Follow Me service) for the digital cellular telecommunications systems.