SCCP Parameters

Each SCCP primitive has associated SCCP parameters that include the necessary information to complete the function corresponding to the primitive.

Local Alias PC

The SCCP level automatically changes the PointCode field of the calledAddress parameter from a local alias used by the network and received by the platform into the LPC. This makes use of local aliases completely transparent to the higher levels such as TCAP. Therefore you should never use a local alias within a local application.

Table 5-3 SCCP Parameters and Values

SCCP Parameter	Structure	Element	Type	Value
`affectedDPC`	-	-	`BITS32`	-
`affectedSSN`	-	-	`OCTET`	-
`associatedPC`	-	-	`BITS32`	-
`callingAddress` `calledAddress`	`SC_ADDRESS`	`pointCodePresent`	`SC_PC_USAGE`	`SC_no, SC_SCCPUse, SC_MTPUse`
		`pointCode`	`BITS32`	`-`
		`ssnPresent`	`ubool`	-
		`ssn`	`OCTET`	-
		`gt`	-	pointer to a `SC_GLOBAL_TITLE`structure or `NULL` (no global title)
	`SC_GLOBAL_ TITLE`	Following fields only used when `gt contains a pointer`
		`routeOnGt`	`ubool`	-
		`gtIndicator`	`SC_GT_INDICATOR`	`SC_noGlobalTitle SC_gtType1 SC_gtType2 SC_gtType3 SC_gtType4`
		`translation`	`SC_TRANSLATION_TYPE`	`SC_unused SC_internetwork_1 SC_networkSpecific_1`
		`numbering`	`SC_NUMBERING_PLAN`	`SC_unknownNumbering SC_isdn SC_userdata SC_telex SC_maritimeMobile SC_landMobile SC_isdnMobile`
		`encoding`	`SC_ENCODING_SCHEME`	`SC_unknownEncode SC_bcdOdd SC_bcdEven`
		`nature`	`SC_ADDRESS_NATURE`	`SC_subscriberNo SC_nationalNo SC_internationalNo`
		`digits`	`char*`	-
`coordStatus`	-	-	`SC_CONFIRM_STATUS`	`SC_granted_withdrawal SC_denied_withdrawal SC_no_peer`
`hopCounter`	-	-	`unsigned char`	Range: 1-15 Defaults to 15 if set outside range.
`importance`	-	-	`int`	This sets the priority level of the message, (whether it will be discarded at MTP if there is congestion). Values range from 0-2, with 0 being the lowest level of importance. If the value of importance in `SCCP_send`() is out of range (0 to 2), the value is reset to 0.
`InSequence`			`ubool`	Set to 0.
`multInd`	-	-	`SC_SMI`	`multIndUnknown multIndSolitary multIndDuplicated`
`returnOption`	-	-	`ubool`	-
`returnReason`	-	-	`SC_RETURN_REASON`	`SC_noTranslationNature SC_noTranslationSpecific SC_subsystemCongestion SC_subsystemFailure SC_unequippedUser SC_networkFailure SC_networkCongestion SC_unqualified SC_errorInMsgTransport SC_errorInLocalprocessing SC_noDestReassembly SC_sccpFailure SC_hopCounterViolation SC_segNotSupported SC_segFailure SC_invalidISNIrouting SC_unauthorizedMsg SC_msgIncompatibility SC_noISNIconsRouting SC_redundantISNIconsRouting SC_noISNIidentification SC_noError`
`SegmOption`	-	-	`ubool`	For future use. Should be set to 0, but no error message is returned
`sequenceControl`	-	-	`int`	-
`serviceClass`	`SC_SERVICE_ CLASS`	-		`SCCP_CLASS_0 = 0 SCCP_CLASS_1`
`spStatus`	-	-	`SC_SP_STATUS`	`SC_inaccessible SC_congestedSC_accessible SC_restartingSC_congested SC_cnx_error`
`XUDTOption`	-	-	`ubool`	See Table Note 1
`XUDTSOption`	-	-	`ubool`	See Table Note 2
`userStatus`	-	-	`SC_USER_STATUS`	`SC_UIS SC_UOS`

Table Note 1

In xunitdata_req:

FALSE: XUDT sent only when segmentation is needed (UDT otherwise).

TRUE: force use of XUDT rather than UDT.

In xunitdata_ind:

FALSE: UDT received.

TRUE: XUDT received.

Table Note 2

In xnotice_req:

FALSE: Use UDTS message type.

TRUE: Use XUDTS message type.

In xnotice_ind:

FALSE: UDTS received.

TRUE: XUDTS received.

Global Title Types

The HP OpenCall SS7 SCCP supports all Global Title types as defined in Q.713 §3.4.1. The application identifies the GT type by setting the gtIndicator.

Table 5-4 Global Title Type

SC_GT_Indicator	ITU-T	ANSI
`SC_gtType1`	nature of address	translation type, numbering plan, encode-scheme
`SC_gtType2`	translation type	translation type
`SC_gtType3`	translation type, numbering plan, encode-scheme	not used
`SC_gtType4`	nature of address, translation type, numbering plan, encode-scheme	not used

You must ensure that gt element of SC_ADDRESS contains a pointer to SC_GT_TITLE.

SCCP Parameters

Technical documentation

» Table of Contents

» Index

Local Alias PC

Table Note 1

Table Note 2

Global Title Types