DS EN 300607-3:2005 Digital Cellular Telecommunications System (Phase 2+) - Mobile Station (Ms) Conformance Specification - Part 3: Layer 3 Abstract Test Suite (Ats) Defines the Abstract Test Suites (ATS) and partial IXIT proforma for the Network Layer (Layer 3) at the mobile radio interface of the GSM or DCS (Phase 2+) mobile stations (MS) conforming to the ENs f