Number Processing in the MTC Flow

Number processing in the MTC flow applies to both 2G and 3G MTCs. It enables the MSC server to perform number change on the calling numbers to be displayed on the terminals of callees. Figure 1 shows the flowchart of number processing in the MTC flow.

Figure 1 Flowchart

  

NOTE:
 

The mandatory tables for querying are highlighted by solid-line frames and the optional tables are highlighted by dotted-line frames.

Pay attention to the following items:

• For an incoming roaming call, the MSC server obtains the MSISDN of the callee when receiving the called subscriber data. In this case, if bit 12 of P144 is set to 1, the MSC server performs UNBUILD normalization on the MSISDN (see UNBUILD Normalization for details) and then records the normalized number for the called number in MTC CDRs.
• If displaying calling numbers on the terminals of callees is allowed, the MSC server queries the CLIP Processing table and CLIP Called Number Correlation Processing table to perform number change on the calling numbers in the Setup message sent to the callees.

Table Description

Table Name	Command	Input Parameter	Output Parameter	Function Description
CLIP Processing table	ADD CLIPRO	Call source name Caller prefix Caller number address nature Caller number maximum length	Called number correlation name Caller number change name Designated caller number format	Based on the call source and caller prefix, the MSOFTX3000 performs number change on the calling number in the Setup message sent to the callee.
CLIP Called Number Correlation Processing table	ADD CLCRPRO	Called number correlation name DN set Called prefix Called number address nature	Caller number change name Designated caller number format	Based on the called number correlation name obtained in the CLIP Processing table and the called prefix, the MSOFTX3000 performs number change on the calling number in the Setup message sent to the callee.