GSM and UMTS (P4)

: Consolidating GSM Phase 1 and Evolving the Services and Features to GSM Phase 2 in ETSI SMG (1992–1995) Philippe Dupuis 1 4.1 General When the agreement on the selection of the GSM technology had been achieved some people thought that the rest would be easy. We knew however that producing a set of specifications that would ensure the interpretability of mobile stations produced by any mobile terminal manufacturer, and network infrastructure produced by any manufacturer of network infrastructure, or the interoperability of different elements of the network infrastructure produced by different manufacturers, would be a formidable task, particularly in the relatively short...