"This EN describes the fault management of any NE of a GSM PLMN through the Q3 interface@ with focus on the Base Station System (BSS). The OAM of the GSM Public Land Mobile Network (PLMN) is organised and described in terms of TMN Management Services. GSM 12.00 describes the architecture and gives a general overview of the OAM services@ while the rest of the GSM 12 series gives the detailed specification for each service and other aspects of the OAM. Among all the TMN Management Services listed in GSM 12.00@ the following are addressed by this specification: - Management of the BSS (also covered by GSM 12.20). - Restoration and Recovery (also covered by GSM 12.06). This Phase 2 version of GSM 12.11 deals with ""Fault Management"" aspects of the above services. For the TMN Management Services covered@ the following ""TMN Management Service Components"" have been defined in clause 5: - Alarm surveillance. - Fault localisation. - Fault correction. - Testing. The above TMN Management Service Components are based on several ""Management Functions""@ some of which are defined in other ITU-T documents (e.g. State Management Functions@ Alarm Reporting Functions@ etc.)@ and others which are specifically defined here@ in clauses 6 and 7. For some management functions@ the Management Information Model is already provided by some ITU-T recommendations@ GSM 12.00 and GSM 12.20. This EN does not include the GDMO definition of the information model. Although sometimes considered as part of fault management@ various administrative policies and procedures such as trouble ticketing and tracking@ parts inventory@ etc. are not included in this EN. Such aspects may be considered to be the responsibility of the operator and thus outside the scope of the EN."