D900/D1800 . ( PPSC/ ) (. 2.5.3.1).
.
MR ( MS) GSM
MCR :
MOC ( GSM)
MTC ( GSM)
( GSM)
, , :
, (SCI)
( OC)
/ " "
MCR , :
(, MOC, MTC)
,
(IMSI, MSISDN)
(IMSI, MSISDN)
( )
"" MSC (VMSC) () MSC (GMSC) . , MSC, , , , . MCR . AOC (. " D900/D1800", " ", " ").
( ) ISDN/ CSC
PLMN , , GSM ( MCR, . ), , ISDN/PSTN ( ). AMA , MCR.
, ISDN/ CSC / . (, MTC, PSTN ). / (SCI) . , .
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CSC :
SPM ( )
CSC D900/D1800 .
MPM ( )
CSC D900/D1800 ( ).
. , ( ), , ( , , , ( ) .
PPM ( )
CSC D900/D1800 , , ( ) . , , .
PM ( )
CSC D900/D1800 , , ( ) . , , .