1. Virtual Signaling Transfer Point User Guide
  2. vSTP Features
  3. Support for CAP/INAP Parameter Filtering
  4. Feature Description

2.21.1 Feature Description

The CAP/INAP based filtering enables vSTP to route INAP based opcode messages based on their CAP components.

vSTP uses the SKBCSM and MSISDN GTT set types to achieve this functionality. The SKBCSM set type remains linked with the OPCODE set type or any of the existing MBR set types, such as IMSI or MSISDN.

The CAP/INAP based filtering is supported only for the following TCAP package types:
  • BEGIN
  • CONTINUE
  • END
Therefore, the OPTSN (Optional Set Name) with one of the MBR set types are allowed to be provisioned only for TOBR GTA entries that have PKGTYPE as BEGIN, CONTINUE, or END.

The INAP/CAP messages are identified using unique the ACN.

When an INAP MSU is processed by the TOBR GTT translation with the OPTSN as SKBCSM or MSISDN, vSTP decodes the CAP portion, extracts the CDPN, BCD CDPN digits, or SKBCSM digits from the MSU and use as a key to search the translation from the GTA table.