Content for TS 23.072 Word version: 18.0.0
5 Messages and their Contents p. 6
5.1 Messages between the MS and the MSC p. 6
5.1.1 CD Request p. 6
The CD Request message is sent from the MS to MSC direction.
| Information element name | Required | Description |
|---|---|---|
| Deflected-to number | M | Number of the C subscriber as entered by the served subscriber. |
| Deflected-to subaddress | C | Subaddress of the C subscriber; shall be present if it was entered by the served subscriber; otherwise shall be absent |
5.1.2 CD Request ack p. 7
The CD Request ack message is sent from the MSC to MS direction. This message contains no information elements.
5.1.3 CD Request negative response p. 7
CD Request negative response message is sent from the MSC to MS direction. The negative response information element can take the following values:
- service not subscribed;
- deflected-to number is own number;
- deflected-to number is a special service code;
- number invalid;
- call barred;
- SS incompatibility;
- forwarding violation;
- forwarding failure.
5.2 Messages between the MSC and the VLR p. 7
5.2.1 Process Call Waiting negative response p. 7
For the description of the Process Call Waiting negative response message refer to TS 23.018. The negative response information element can take the following additional value:
- Call Deflection.
| Information element name | Required | Description |
|---|---|---|
| Deflected-to number | M | Number of the C subscriber as entered by the served subscriber. |
| Deflected-to subaddress | C | Subaddress of the C subscriber; shall be present if it was entered by the served subscriber; otherwise shall be absent |
5.2.2 Complete Call negative response p. 7
For the description of the Complete Call negative response message refer to TS 23.018. The negative response information element can take the following additional value:
- Call Deflection.
| Information element name | Required | Description |
|---|---|---|
| Deflected-to number | M | Number of the C subscriber as entered by the served subscriber. |
| Deflected-to subaddress | C | Subaddress of the C subscriber; shall be present if it was entered by the served subscriber; otherwise shall be absent |
5.2.3 Send Info for Incoming Call negative response p. 8
For the description of the Send Info for Incoming Call negative response message refer to TS 23.018. The negative response information element can take the following additional values:
- service not subscribed;
- deflected-to number is own number;
- deflected-to number is a special service code;
- number invalid;
- call barred.
6 Functions of the serving MSC p. 8
The functions of the serving MSC are specified in TS 23.018. The procedures specific to the CD supplementary service are specified in this clause.
6.1 Procedure Handling_CD_MSC p. 8
This procedure is called when a CD request is received from the MS.
6.2 Procedure CD_Reject p. 8
This procedure is called if the CD request was treated unsuccessful in the VLR.
6.3 Procedure CD_Failure p. 8
This procedure is called if the CD request was treated unsuccessful in the serving MSC.
6.4 Procedure CD_UUS_Interaction p. 8
This procedure is called if the CD request was treated unsuccessful in the serving MSC due to the interaction with the UUS supplementary service.
6.5 Procedure CD_Success p. 8
This procedure is called if the CD request was treated successful in the serving MSC.
6.6 Procedure CD_Notify_SS_Invocation p. 8
This procedure is called by the procedures CD_OR_Clear and CD_Success to send notification of the CD invocation to the gsmSCF if required.
The output signal SS Invocation Notify is sent if the SS-CSI was received in the SIFIC ack. The SS-CSI will only be included in the SIFIC ack if there is a requirement to notify the gsmSCF that CD has been invoked.
