Calling Party Category
- Kelli Higdon
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The Calling Party Category is a parameter that distinguishes the station used to originate a call. SIP Support for ISUP Calling Party Category inter-works the Calling Party Category parameter in the SS7 ISUP message to the SIP network. The CPC (Calling Party Category) Parameter is included in either the From: Header or the P-Asserted Identity Header. The CPC also carries other important information that describes the originating party. Interworking of CPC values is supported from the SS7 network to the SIP Network only. See information below on how to configure and map the CPC parameter.Â
Diagram
The diagram below shows the flow of data from an SS7 Network to an IP network using SIP signaling. The Calling Party Category Parameters in the IAM on the SS7 side are then interworked into the INVITE message on the SIP side. The Calling Party Parameter can be interworked into either the From: Header or the P-Asserted Identity Header.
Call Flow
User Part or Username Call Trace example
From:unavailable<sip:unavailable;cpc=operator@10.129.39.59>;tag=95ffcd055e0f78f7d5d397020e89288d78a1Â
Parameter Part Call Trace example
From:unavailable<sip:unavailable@10.129.39.59;cpc=operator>;tag=95ffcd055e0f78f7d5d397020e89288d78a1Â
CPC Mapping
Received CPC | CPC sent out in a SIP message |
Operator, language French | operator |
Operator, language English | operator |
Operator, language German | operator |
Operator, language Russian | operator |
Operator, language Spanish | operator |
Ordinary calling subscriber | ordinary |
Calling subscriber with priority | priority |
Data Call (voice band data) | datacall |
Test Call | test |
Payphone | payphone |
Configuration
Initial Configuration
The Calling Party Category Parameter is configured in the SIP ISUP CPC Mapping object under the SIP Profile object. The SIP Profile is then inserted into an external network element object. Below are instructions on how to configure the Calling Party Category parameter. Before configuring, the IMG 2020 must have an initial configuration created on it. Follow the Basic Configurations procedure before proceeding.Â
Create SIP Profile (SGP) and enable OLI
Create a SIP SGP object. Under the SIP SGP object, the ISUP OLI can be configured.
Create a SIP Profile. Right click on the Dialogic object and select New Profiles. The Profiles object is a parent or container object and no configuration is needed here.
Right click on the Profiles object and select New SIP Profile. The first profile that gets created is a Default SIP Profile and cannot be modified. Disregard this profile.
Right click on the Profiles object just created again and select New SIP Profile. Either enter a Name into the name field that identifies this profile or accept the default entry.
Right click on the SIP Profile object just created and select New SIP ISUP CPC Mapping. By default, the SIP ISUP CPC Mapping object is set to Disabled. For information on how to configure each of the individual fields in the object, refer to the SIP Profile - ISUP CPC Mapping topic.
Create SIP signaling stack
Right click on the IMG 2020 physical node and select New Signaling. Â The Signaling object is a parent or container object and no configuration is needed here. Refer to the Signaling topic for more information on this object.
Right click on the Signaling object created and select New SIP. In the IP Address field, select from the drop down menu which IP address will be used for SIP signaling. Refer to IMG 1010 - SIP Signaling Object topic for more information.
Create SIP Channel Groups
Right click on the Dialogic 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.
Right click on Routing Configuration and select New Channel Groups. The Channel Groups object is a container object also and no configuration is needed. Refer to the Channel Groups topic for more information.
Right click on Channel Groups object and select New Channel Group. Either enter a name that identifies this channel group or accept the default entry. In this example the Channel Group was labeled SIP_ISUP_CPC_ChGrp.
Select SIP from the drop down menu of the Signaling Type field. Refer to Channel Group topic for more information on configuring this object.
Create an External Gateway
The SIP Channel group needs to communicate withe an external SIP entity. Create an external network element and then an external gateway that the SIP channel group will transmit messages to. Follow procedure below to communicate with a remote gateway.
Right click on the Dialogic 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 External Network Elements topic for more information.
Right click on External Network Elements and select New External Gateways. The External Gateways object is a parent or container object also and no configuration is needed here. Refer to External Gateways for more information.
Right click on External Gateways and select New External Gateway. Enter a name that identifies the gateway being configured. In this example the gateway was labeled SIP_ISUP_CPC_GW
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Refer to the  External Gateway topic for more information.
 Insert SIP External Network Element into SIP Channel Group:
Right Click on the SIP Channel group created and select New IP Network Element. Within the IP Network Element field, select from drop down menu, the gateway created. See screen capture below.
Click on the Channel Groups object again. The Channel Groups object will have a yellow exclamation point in place of the icon indicating the configuration has not been sent to the IMG 2020. Click on the Download Resource Tables button and the new configuration will be sent to the IMG 2020.
The SIP ISUP CPC Mapping feature is now configured.