enum MtasSdsImrnNaiDT

Numeric Enumeration: 0-1 (0=LEGACY, 1=NATIONAL)

References from:
MtasSds;

0
LEGACY
The IMRN format is set according to calledPartyNumber format for T-SDS or set to International for O-SDS.
1
NATIONAL
The IMRN is set to National format.