03.663GPPStage 2Support of GSM Mobile Number Portability (MNP)TS
This clause specifies the content of the following messages:
On the ISUP interface:
On the MSC – NPDB interface:
In the tables which follow, information elements are shown as mandatory (M), conditional © or optional (O). A mandatory information element shall always be present. A conditional information element shall be present if certain conditions are fulfilled; if those conditions are not fulfilled it shall be absent. An optional element may be present or absent, at the discretion of the application at the sending entity.
A.4.1 Messages on the ISUP interface
This message is specified in . It is necessary for the IAM to contain the information needed to route the call to the subscription network of the ported subscriber. The ways in which this may be coded are shown in .
A.4.2 Messages on the MSC – NPDB interface
A.4.2.1 INITIAL DP
This message is specified in .The following information elements are required:
Information element name
Identifies the requested IN service (MNP query).
Called Party Number
The possibly ported MSISDN
A.4.2.2 INITIAL DP negative response
This message is specified in .The negative response information element can take the following values:
- missing parameter;
- unexpected data value.
This message is specified in . It shall be ensured that the information in the Connect message shall be aligned with the coding supported in the ISUP signalling.
This message does not contain any information element.
Annex B (normative):
Handling of Non-Call Related Signalling