The page allows you to associate a TT (Translation Type) and SSN (Sub System Number) combination with a specific NP (Numbering Plan) and type of service. This relationship is used by the signaling application to determine the associated NP for a signaling message and to provide proper treatment of a message for the duration of the signaling message process.
In order to determine which database to query the application must know if the incoming message's CdPA address digits contain a DN or an IMSI. The NP describes the contents of the address digits. The supported NPs are:
- E.164 – The address digits contain a DN. Perform number conditioning on the address digits and query the DN database with the conditioned number.
- E.212 – The address digits contain an IMSI. Perform number conditioning on the address digits and query the IMSI database with the conditioned number.
- E.214 – The address digits contain a Mobile GT. Perform number conditioning on the address digits, convert the conditioned number to an E.212 number, then query the IMSI database with the converted number.