2.1.6 TIF Post-NPP Processing for TIF NP

TIF post-NPP processing performs all actions required for NP Release and most actions required for NP Relay. The only extra NP-specific logic in TIF post-NPP processing is a Result Handler that performs the following functions:

• If the NPFLAG option value is NM, and the NPRST parameter value is ON for the Destination Point Code in the DestinationCommon Screening List (CSL) table, then the NM bits will be set to 00 (meaning “without indication”).
• If the NPFLAG option value is NM, and the NPRST parameter value is OFF for the Destination Point Code in the DestinationCSL table, and if.the incoming NM bits are not equal to the outgoing NM bits, then the outgoing NM bits are written to the outgoing ISUP IAM message (see NPRELAY Service Action Handler for details).
• If the Destination Point Code is not found in the Destination table, then the message is discarded and a UIM is generated.