SCCP/TCAP Parameter Information

Overview

This section contains information on SCCP and TCAP parameters inserted into the SCCP and TCAP ICBs. Note special instructions for the parameters described below.

Description of Parameters

Called Party Address (CDPA)

The CDPA in the primitive request is used if specified. If DPC is not included in the CDPA, the MTP DPC or adjacent translator must be provided.

The following sequence is used for deriving the DPC:

• Use DPC in CDPA if provided; otherwise,

• If CDPA routes on DPC/SSN, then use the MTP DPC in the primitive or in the SSN default table. If CDPA routes on Global Title, then use the first adjacent translator as the DPC.

Important! As an SSP, Global Title Translation (GTT) is not provided.

Calling Party Address (CGPA)

The CGPA in the primitive request is used if provided; otherwise,

• If a TCAP primitive, the CGPA stored for this dialog is used.

• If configured for this SSN, the CGPA in the SSN default table is used.

Component Present

This indicates whether or not components are present. If components are present, then only syntactically valid and opportune components are delivered to the destination TC-USER.

Dialog ID

This parameter appears in the dialog handling and component handling primitives. to associate components with a dialog. The same dialog ID must be used within the same dialog. In a Unidirectional primitive, the same dialog ID assures that all components with the identical dialog ID are blocked together in the same Unidirectional message destined for the same destination address.

For structured dialogs, the dialog ID is used to identify all components belonging to the same dialog from the beginning of the dialog to its end. The dialog ID maps onto the transaction IDs exchanged in the messages between a pair of nodes.

Error Code

Use the NATIONAL-ERR-CODE parameter type (0x47) if a national error code is used, or the PRIVATE-ERR-CODE tag (0x48) if a private error code is used.

Last Component

Used in primitives of the Indication type to designate the last component of a message. Note that indication of the last part of the result of an operation is via the name of the primitive.

In the case of multiple components received within a TCAP message, a TC-transaction indication primitive followed by several TC-component indication primitives are sent to the TC-USER. The Last Component parameter in the TC-component primitive specifies if this component is the last component in the message.

This should not be confused with the Last/Not Last primitive type, which indicates the last or not last part of an operation or result of an operation.

Operation

Use the GLOBAL-OPER-CODE parameter type (0x2C) if a national operation code is used, or a LOCAL-OPER-CODE tag (0x2D) if a private operation code is used.

Parameter (ITU only)

Use the PARAMETER-SEQ parameter type (0x4A) to send a sequence of parameters or the PARAMETER-SET tag (0x4B) to send a parameter set.

Problem Code (ITU only)

Use PROBLEM-TYPE-CODE parameter type.

Quality of Service

The QOS in the primitive request is used if specified, otherwise;

• The QOS in the SSN default table is used if it is configured for the subsystem, otherwise;

• The following default configuration is used:

Return Option = Do Not Return on Error

Sequence Option = Sequence Not Guaranteed

Message Priority (ANSI)=0x00

Termination

Indicates which scenario is chosen by the TC-USER for the end of the dialog (prearranged or basic).

Timeout (ITU only)

The timeout value is in 10 ms units.

ITU Parameter Information

This section contains information on ITU SCCP and TCAP parameters inserted into the SCCP and TCAP ICBs.

ITU SCCP Parameter IDs

ITU TCAP Parameter IDs

ANSI Parameter Information

This section contains information on ANSI SCCP and TCAP parameters inserted into the SCCP and TCAP ICBs.

ANSI SCCP Parameter IDs

ANSI TCAP Parameter IDs

Parameter Format

The following table illustrates the parameter format for parameters inserted into the SCCP and TCAP ICBs.

Parameter Data

This section shows the specific data for each parameter.

Abort Reason

Calling Party Address (CGPA)

Calling Party Address (CGPA) Element

Note:

1. Subsystem Number is 0x00 if unknown or not provided.

2. The Point Code is 0xFFFFFFFF if unknown or not provided.

3. The Calling Party Address is constructed with the elements provided and converted to ANSI or ITU format according to the appropriate specification.

4. The National/International flag applies only to indication. In a request, SCCP codes the CGPA according to the SCCP SCLC Component SCLC Configuration Byte 1.

5. "Global Title Indicator" in Data[11] corresponds to the "Global Title Indicator" in the SCCP message CGPA.

Called Party Address (CDPA) Element

Note

1. Subsystem Number is 0x00 if unknown or not provided.

2. The Point Code is 0xFFFFFFFF if unknown or not provided.

3. The Called Party Address is constructed with the elements provided and converted to ANSI or ITU format according to the appropriate specification.

4. The National/International flag applies only to indication. In a request, SCCP codes the CDPA according to the SCCP PPL SCLC Component Config Byte 1.

5. "Global Title Indicator" in Data[11] corresponds to the "Global Title Indicator" of the SCCP message CDPA.

Class

Component Present

Dialog_AS_ID

The values for the Dialog_AS_ID parameter are automatically stored in the Excel platform, consistent with ITU TCAP specifications. They cannot be modified by the host if you use the ITU White Book.

Error Code

Last Component

Operation

P Abort Cause (ITU)

P Abort Cause (ANSI)

Problem Type Code (ITU)

Problem Type Code (ANSI)

Protocol Version

The values for the Protocol Version parameter are automatically stored, consistent with ITU TCAP specifications. They cannot be modified by the host if you use the ITU White Book.

Quality of Service (QOS)

*Refer to ANSI MTP Specification T1-111.5 for the information on selecting message priority.

**For the outgoing messages, the sequence is guaranteed for the messages with the same sequence control value. They will reach the destination in the same order as they were sent out. For the incoming messages, this value simply means the sequence is guaranteed (SCCP class 1 services are used in this case).

Remote SCCP Status

Return Reason (ITU)

Return Reason (ANSI)

Subsystem Status

Termination Option

Unidialog_AS_ID

The values for the Unidialog_AS_ID parameter are automatically stored, consistent with ITU TCAP specifications. They should not be modified by the host if you use the ITU White Book.

User-Defined Parameters

• Application Context Name

• MTP DPC

• Correlation ID

• Invoke ID

• Linked ID

• Parameters

• Parameter Sequence

• Parameter Set

• Signaling Point Code (SPC)

• Subsystem Number

• Timeout

• User Data

• User Information