The screening indicator, presentation indicator, or both can be passed through to the SS7 IAM Calling Party number unchanged or can be passed through with overridden values that are configured through the Advanced Originating Number Parameter object. The feature is supported only when SIP Privacy is enabled and a call is received by the IMG 2020 from the SIP network and is transmitted to the SS7 network. Because the feature modifies the behavior of the IMG 2020, a field has been added that can disable or enable the new functionality. The default setting in the Web GUI is Disable which forces the IMG 2020 to interwork the parameters as it did before the feature was introduced. Refer to the links below for more information regarding this feature.
Call Flow Diagrams
Refer to the Call Flow diagrams below.
Originating Number SI/PI take Priority = Disable
RPID Header | (Advanced Originating Number Parameter)-Screening Indicator Override field | (Advanced Originating Number Parameter)-Presentation Indicator Override field | SS7 Calling Party Number Value |
SI = 001 PI = 001 | No Translation | No Translation | SI = 001* PI = 001 |
SI = 001 PI = 001 | SI = 002 | PI = 003 | SI = 001* PI = 001 |
With Privacy Enabled the screening indicator and presentation indicator on the outgoing SS7 side have not been modified.
Originating Number SI/PI take Priority = Disable
RPID Header | (Advanced Originating Number Parameter)-Screening Indicator Override field | (Advanced Originating Number Parameter)-Presentation Indicator Override field | SS7 Calling Party Number Value |
SI = 001 PI = 001 | SI = 002 | PI = 003 | SI = 002* PI = 003 |
With Privacy Enabled and the SI/PI Priority field set to Enable, both the SI and PI are overridden.
Configuration
The procedure below describes the objects that need to be configured for this feature to function. The procedure assumes that all the functionality described in the Basic Configurations topic have been completed. Additional functionality such as SS7 needs to be configured. Refer to the Configure SS7 for information on this. Once the initial functionality is configured, continue on with the procedure below.
Configure SIP SGP Profile and enable SIP Privacy
Right click on the Profiles object and select New SIP SGP. Once SIP SGP pane is created, change the SIP Profile ID to something other than '0'. The SIP SGP object with a 0 in the SIP Profile ID field is a default profile and cannot be modified. Once the ID has been modified, the individual fields in the SIP SGP object can be modified.
Within the SIP SGP object, is a SIP Privacy field. Enable SIP Privacy in the SIP SGP object by selecting ON from the drop down menu in this field. Refer to SIP Profile - SGP topic for more information on configuring the remaining individual fields within this object.
Configure SIP Privacy to Remote-Party Only in SIP Signaling
Right click on the IMG Name physical node object and select New Signaling. The Signaling object is a parent or container object and no configuration is needed here. Refer to the topic for more information on this object.
Right click on the Signaling object just created and select New SIP. In the Privacy Support field select Remote-Party only from the drop down menu. Refer to the SS7 - Signaling topic for more information on configuring each of the remaining fields within this object.
Configure Outgoing Translation Table
Right click on the IMG EMS object and select New Routing Configuration. The Routing Configuration object is a parent or container object and no configuration is needed here. Refer to the Routing Configuration topic for more information on this object.
Right click on the Routing Configuration object and select New Outgoing Translation Tables. The Outgoing Translation Tables object is also a parent or container object and no configuration is needed here. Refer to the Outgoing Translation Tables object for more information.
Right click on the Outgoing Translation Tables object and select New Translation Table. Enter a name into the Translation Table Name field that will identify this translation table. Refer to the object for more information on configuring the individual fields in this object.
Right click on the Translation Table created and select New Translation Element. Enter a string of digits to match on in the String field. Refer to the topic for more information on configuring the individual fields in this object.
Right click on the Translation Table Element object and select New Advanced Originating Number Translation. To enable the feature select Enable from the SI/PI Priority field drop down menu.
If both the Screening Indicator and Presentation Indicator will be interworked/added, configure the selection of either the screening indicator, the presentation indicator, or both from the drop down lists in the Advanced Originating Number Translation object displayed below.
PKN: Need Web GUI screenshot to replace ClientView GUI.
Configure SS7 Channel Group
Right click on the Routing Configuration object and select New Channel Groups. The Channel Groups object is a parent or container object and no configuration is needed here. Refer to the Channel Groups topic for more information on this object.
Right click on the Channel Groups object and select New Channel Group. Enter a name to identify this channel group.
Select SS7 from the drop down menu in the Signaling Type field.
In the Outgoing Translation Table field select from the drop down menu the Translation Table created above that has the Screening and/or Presentation Indicator overridden. Refer to the Channel Group topic for more information on configuring the individual fields in this object.
Right click on the Channel Group object and create the ISUP Group. Select the correct SS7 Stack from the OPC-DPC field. Refer to the topic for more information on configuring the remaining fields in this object.
Right click on the ISUP Group object and select New Circuits. Refer to the SS7 - Circuit Group under Signaling topic for information on configuring the CICs.
Configure Remote SIP Gateway
Right click on the IMG EMS object and select New External Network Elements. The External Network Elements object is a parent or container object and no configuration is needed here. Refer to the External Network Elements topic for more information on this object.
Right click on the External Network Elements object and select New External Gateways. Again, the External Gateways object is a parent or container object and no configuration is needed here. Refer to the External Gateways topic for more information on this object.
Right click on the External Gateways object and select New External Gateway. Enter a name that identifies this gateway.
Select SIP from the drop down menu in the Gateway Signaling Protocol field and enter an IP address that will be used to communicate with this gateway.
Select the SIP SGP Profile created above that has the SIP Privacy enabled in it from the drop down menu of the SIP Profile field. Refer to the External Gateway topic for more information on configuring the individual fields in this object.
Configure SIP Channel Group
Right click on the Channel Groups object and select New Channel Group. Enter a name to identify this channel group.
Select SIP from the drop down menu in the Signaling Type field. Refer to the Channel Group topic for more information on configuring the individual fields in this object.
Right click on the SIP channel group created and select New IP Network Element. Select from the drop down menu of the IP Network Element field the remote gateway configured above. Refer to the IP Network Element topic for more information on configuring the object.
PKN: Need Web GUI screenshot to replace ClientView GUI.
Configure Routing
At this point, the feature has been configured along with the SIP and SS7 channel groups. The routing configuration can now be configured so that the call is routed from the SIP channel group to the SS7 channel group since this feature is supported from SIP to SS7.