2.21.1.1 CDPN and BCD CDPN Based Filtering

For CDPN or BCD CDPN based filtering, the GTT set type must be set as MSISDN and it must be linked with the OPTSN of an INAP based OPCODE/MBR set type GTA entry.

Once the MSU is processed, filtering is done for CDPAGTA followed by the filtering for OPCODE, and then if OPTSN is set as MSISDN and the message contains CDPN or BCD CDPN portion, digits are decoded and are looked up in Global Title Addresses table, where message is translated and sent to the configured Point Code (RSP).

If MSU contains both CDPN and BCD CDPN portion, then BCD CDPN gets more priority and translation takes place only for those digits. The MSISDN decoding is supported for the following INAP messages:

• IDP
• IDPSMS
• IDPGPRS

Note:

In case of an MSU that contains both CDPN and BCD CDPN portion, translation is performed only on BCD CDPN digits. If BCD CDPN is not present in GTA table, translation gets failed irrespective of the availability of the CDPN digits translation entry in the table.

Call Flow

The following diagram shows a call flow for OPCODE MSISDN based filtering:

Figure 2-15 Call Flow for Opcode-Msisdn Based Filtering