DTR 01038v002 - ETSI docbox
A 'null-NRI' indicates to a radio node (BSC/RNC) that the NAS Node Selection
Function shall be used for selecting a CN node to receive a message. There is
one unique 'null-NRI' in a PLMN supporting pool functionality. In MOCN shared
networks (see TS 23.251) with multiple CN Operators, there is one unique 'null-
NRI' ...
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