A.2 Emergency calls only mode

22.0223GPPMobile functionality specificationPersonalisation of Mobile Equipment (ME)Release 17TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

The expression "emergency calls only mode" is used in this TS to describe the state the MS (combined ME and SIM) or US (combined ME and USIM) enters when a personalisation check fails. In this mode, the state of the MS/UE is equivalent to the "limited service state" (see TS 23.122) [4]. Although the personalisation has failed, the ME will be able to access the TMSI and IMSI from the SIM/USIM, and therefore any emergency call request shall use these as the MS/UE identity.

Set up of emergency calls remains as usual dependent on the status of Access Class 10 being broadcast in the cell (see TS 22.011) [2].