ITU and ANSI SCCP Primitives

Overview

This section lists the SCCP primitives supported by the SCCP/TCAP feature. Primitives are sent to and received from the switch in the PPL Event Request and PPL Event Indication messages in the ICB:

SS7 SCCP Parameters (0x20).

Important! SCCP/TCAP primitives should not be confused with Excel PPL primitives. SCCP Components should not be confused with Excel PPL components. See the PPL Information for PPL event values and the API Reference ICB formats.

The required ICBs with mandatory (M) and optional (O) parameters are shown with each primitive. See SCCP/TCAP Parameter Information for the data required for each parameter.

ITU/ANSI SCCP Events

The SCCP User Interface is responsible for message validation and format conversion. The following events are used to send and receive primitives for the PPL component, SCCP SUSI (0x67).

N-UNIT-DATA

Request

Indication

SCCP Parameter ICB (M)
- User Data (M)
- Calling Party Address (CGPA) or CGPA Elements (O)
- Called Party Address (CDPA) or CDPA Elements (M)
- Quality of Service (O)

Same as Request.

N-NOTICE (0x22)

Request

Indication

 

SCCP Parameter ICB (M)
- User Data (M)
- Calling Party Address (CGPA) or CGPA Elements (O)
- Called Party Address (CDPA) or CDPA Elements (M)
- Reason for Return (M)

N-STATE (0x03)

Request

Indication

SCCP Parameter ICB (M)
- Subsystem Number (M)
- Subsystem Status (M)

SCCP Parameter ICB (M)
- Destination Point Code (DPC) (M)
- DPC Status (O)
- Remote SCCP Status (O)

Important! When you use the N_STATE event to set a subsystem prohibit, all of the active TCAP dialogs associated with the SSN are automatically released.

N-PCSTATE (0x04 )

Request

Indication

 

SCCP Parameter ICB (M)
- Destination Point Code (DPC) (M)
- DPC Status (O)
- Remote SCCP Status (O)