CSpAclSi
The list of possible Service Indicator values. This identifies the type of SS7 packet. The service indicator codes for the international signalling network are allocated as follows: 0 Signalling network management messages (SNMM) 1 Signalling network testing and maintenance messages (SNTM) 2 Spare 2 3 SCCP 4 Telephone User Part (TUP) 5 ISDN User Part (ISUP) 6 Data User Part, call and circuit-related messages (DUPC) 7 Data User Part, facility registration and cancellation messages (DUPF) 8 Reserved for MTP Testing User Part (MTUP) 9 Broadband ISDN User Part (BISUP) 10 Satellite ISDN User Part (SISUP) 11 Spare 12 Spare 13 Spare 14 Spare 15 Spare Reference: ITU Q.704 Signalling network functions and messages section 14.2.1 Service indicator.