ETSI EN 301 419-1
ETSI EN 301 419-1
Digital cellular telecommunications system (Phase 2); Attachment requirements for Global System for Mobile communications (GSM); Part 1: Mobile stations in the GSM 900 and DCS 1 800 bands; Access (GSM 13.01 version 4.0.1)
standard published 12/01/1999 by European Telecommunications Standards Institute