Subscriber related event and call data : recommendation GSM 12.05: release note: version 3.2.0 / European Telecommunications Standards Institute
GSM network change control : recommendation GSM 12.06: update note: version 3.0.2 / European Telecommunications Standards Institute
Maintenance provisions for operational integrity of mobile stations : recommendation GSM 12.10: release note: version 3.0.1 / European Telecommunications Standards Institute
Maintenance of the base station system : recommendation GSM 12.11: correction note: version 3.0.1 / European Telecommunications Standards Institute