Heading Codes

2.3 Heading Codes

The heading code H0 occupies the 4-bit field following the transaction number and is coded as follows:

0000	Not used
0001	Location Data Forward Messages (LDF),
0010	Category/ Supplementary Service Forward Messages (CSF)
0011	Location Data Backward Messages (LDB)
0100	Category/ Supplementary Services Backward Messages (CSB)
0101	Spare
0110	Management and Administration Messages (MAM)
0111	Spare
1000	Security Data Transfer Messages (SDM)
1001	Roaming Signalling Messages (RSM)
1010	Gateway Signalling Messages (GSM)
1011	Home Location Register Signalling Messages(HSM)
1100	Spare
::	::
1111	Spare

MUP Message Heading Code Allocation

Mess. group	H0/H1	0000	0001	0010	0011	0100	0101	0110	0111
Not used	0000	Not used
LDF	0001		LUM	LCM	SUM
CSF	0010		CSU	SRM	PSR
LDB	0011		LUA	LUR	LCA	SUA
CSB	0100		CSA	SRA	PSA
Spare	0101
MAM	0110		RES	REA	SFN	SFA	MSD	MSA
Spare	0111
SDM	1000		ADR	ADA	ADN				SDR
RSM	1001		RNE	RNM	RNR	CTE	CTA	CTR	REM
GSM	1010		GEI	GRM	GSE	GET	SEM	SEA
HSM	1011		HRE	HRM	HRR
Spare	1100
Spare	1101
Spare	1110
Spare	1111
	H0/H1	1000	1001	1010	1011	1100	1101	1110	1111
Not used	0000
LDF	0001
CSF	0010
LDB	0011
CSB	0100
Spare	0101
MAM	0110
Spare	0111
SDM	1000	SDA	SDN	SDIH	SDAH	SDNH	SDIV	SDAV	SDNV
RSM	1001	RIM	RIR	BNE	BNM	BNR	REM2	IRI
GSM	1010
HSM	1011
Spare	1100
Spare	1101
Spare	1110
Spare	1111

Table 2.3. MUP Message Heading Code Allocation

Abbreviations used in the table:

ADA	Authentication Data Request Message
ADN	Authentication Data Not Available Message
ADR	Authentication Data Request Message
BNE	Business Group Number Enquiry Message
BNM	Business Group Number Information Message
BNR	Business Group Number Rejected Message
CSA	Category/ Supplementary Services Accepted Message
CSB	Category/ Supplementary Services Backward Messages
CSF	Category/ Supplementary Services Forward Messages
CSU	Category/ Supplementary Services Updating Message
CTA	Conditional Call Transfer Accepted Message
CTE	Conditional Call Transfer Enquiry Message
CTR	Conditional Call Transfer Rejected Message
GEI	Gateway Enquiry Initial Message
GET	Gateway Enquiry Terminate Message
GRM	Gateway Routing Message
GSE	Gateway Subsequent Enquiry Message
HRE	HLR Routing Enquiry Message
HRM	HLR Routing Message
HRR	HLR Routing Rejected Message
IRI	IN Routing Information Message
LCA	Location Cancellation Accepted Message
LCM	Location Cancellation Message
LDB	Location Data Backward Messages
LDF	Location Data Forward Messages
LUA	Location Updating Accepted
LUM	Location Updating Message
LUR	Location Updating Rejected Message
MAM	Management and Administration Messages
MSA	Manufacturer Specific Data Acknowledge Message
MSD	Manufacturer Specific Data Message
PSA	Pre-Supplementary Services Registration/ Cancellation Acknowledgement Message
PSR	Pre-Supplementary Services Registration/ Cancellation Message
REA	Restart Information Acknowledgement Message
REM	Routing Enquiry Message
REM2	Routing Enquiry Message 2
RES	Restart Information Message
RIM	Routing Information Message
RIR	Routing Information Reject Message
RNE	Roaming Number Enquiry Message
RNM	Roaming Number Message
RNR	Roaming Number Rejected Message
RSM	Roaming Signalling Messages
SDA	Security Data Available Message
SDAH	Security Data Acknowledgement MTXH Message
SDAV	Security Data Acknowledgement MTXV Message
SDIH	Security Data Inquiry MTXH Message
SDIV	Security Data Inquiry MTXV Message
SDM	Security Data Transfer Messages
SDN	Security Data Not Available Message
SDNH	Security Data No Acknowledgement Message
SDR	Security Data Request Message
SEA	Serving Exchange Acknowledgement Message
SEM	Serving Exchange Message
SFA	Security Failure Notification Acknowledge Message
SFN	Security Failure notification Message
SRA	Supplementary Services Registration/ Cancellation Acknowledgement Message
SRA	Supplementary Services Registration/ Cancellation Acknowledgement Message
SRM	Supplementary Services Registration/ Cancellation Message
SRM	Supplementary Services Registration/ Cancellation Message
SUA	Supplementary Updating Acknowledge Message
SUM	Supplementary Updating message