Conversion of National/Local Numbers to International Numbers

6.2.1 Conversion of National/Local Numbers to International Numbers

G-Flex stores international DNs and IMSIs in the GDB. SCCP CdPA numbers may need to be converted to international numbers in order to do an GDB lookup. When a message needs G-Flex Relay and has either a national (significant) number or Subscriber Number as the Service NAI, then the national/local to international number conversion is triggered. G-Flex uses the SCCP CdPA GTAI number and its SNAI to convert to an international number based on the numbering plan as shown in the following table:

Table 6-2 National/Local Numbers to International Numbers Conversion Logic

Service Numbering Plan	Service Nature of Address	Action
E.164	National (Significant) number	Prepend GTAI digits with the default E.164 Country Code (CC).
E.164	Subscriber number	Prepend GTAI digits with the default E.164 country code (CC) and network code (NC).
E.212	National (Significant) number	Prepend GTAI digits with the default mobile country code (MCC).
E.212	Subscriber number	Prepend GTAI digits with the default Mobile Country Code (MCC) and Mobile Network Code (MNC).
E.214	National (Significant) number	Prepend GTAI digits with the default E.164 Country Code (CC).
E.214	Subscriber number	Prepend GTAI digits with the default E.164 Country Code (CC) and Network Code (NC).
Other	N/A	Assume the default to be E.164 International number

Notes:

If any of the default CC, NC, MCC, or MNC are required for conversion and are not provisioned in the database, G-Flex Relay issues a measurement and falls through to GTT.
If the converted number is fewer than five digits, G-Flex Relay falls through and performs GTT on the message. G-Flex Relay issues a measurement when a converted number is fewer than five digits.
If the converted number is more than 15 digits, then G-Flex Relay issues a measurement when the number exceeds 15 digits and falls through to GTT.
G-Flex Relay uses the conditioned number for database lookup purposes only and does not modify the CdPA GTAI in the message unless rcgta=yes or ccgt=yes.
For the G-Flex selector-specified service numbering plan (IMSI, DN, or MGT), the numbering plan in the incoming message is replaced with the G-Flex Selector service numbering plan (E.164, E.212, or E.214, respectively). This is for GDB lookup purposes only.