In this section:
High Probability of Completion (HPC) features comprise a set of functionalities that provide an enhanced probability of call completion to authorized Government Emergency Telecommunications Service (GETS) and Wireless Priority Service (WPS) users during network stress and/or congestion.
There are two methods in HPC call classification:
- Early HPC classification—an HPC call is recognized based on the received SIP RPH content in the incoming INVITE or the code point in Calling Party's Category (CPC) parameter of the ISUP-MIME. For ANSI, the CPC parameter is National Security/Emergency Preparedness (NS/EP) and for ITU, the CPC parameter is International Emergency Preference Scheme (IEPS).
- Late HPC classification—An HPC call can also be recognized by PSX during analysis of the Called Party Number.
HPC capable switches such as GSX9000 enable HPC calls to receive additional network support to increase the chances of successful call completion.
For more information on GSX9000’s GETS and WPS feature, refer to GSX documentation Support for Government Emergency Telecomunications Service and Wireless Priority Service.
The SBC supports a subset of GSX9000's HPC capabilities and the capabilities are as follows:
- HPC call classification that is, early or late HPC classification.
- Call Admission Control (CAC) treatment: ingress CAC for early HPC classified calls and egress CAC treatment for early and late HPC classified calls.
- The Resource-Priority header (RPH) is used for treating and marking SIP calls as HPC calls.
- Network Wide HPC (NW-HPC) License enforcement.
Note
- The SBC must be configured to use the external PSX for this feature. For more information on PSX's GETS / WPS feature, refer to PSX documentation Government Emergency Telecommunications Service.
Preferential servicing of HPC calls is conditional on the installation of NW-HPC license on EMS. For more information on EMS licenses, refer to the EMS documentation Licensed Applications and Features.
To View Hpc Call Profile
On the SBC Main screen, go to Configuration > Profile Management > Category: Service Profiles > Hpc Call Profile. The Hpc Call Profile window is displayed.
Hpc Call Profile Window
To Edit Hpc Call Profile
To edit any of the created Hpc Call Profiles, click the radio button next to the specific Hpc Call Profile entry.
Hpc Call Profile Highlighted
The Edit Selected Hpc Call Profile window is displayed below.
Hpc Call Profile Edit Window
Make the required changes and click Save at the right hand bottom of the panel to save the changes made.
To Create Hpc Call Profile
To create a new Hpc Call Profile, click New Hpc Call Profile tab on the Hpc Call Profile List panel.
Hpc Call Profile Fields
Hpc Call Profile Create Window
The following fields are displayed:
Hpc Call Profile parameters
Parameter | Description |
|---|---|
| Name | The name of the HPC Call Profile. |
| State | Determines whether the HPC Call Profile entry is enabled or disabled.
|
| DSCP Value | The DSCP code for the HPC Call. The value has a range of 0-63, with a default of 0. The DSCP configuration in the SIP signaling port marks non-HPC calls. The DSCP value configured in the HPC profile takes precedence over the DSCP value configured in the SIP signaling port, and applies to all outbound traffic (IPv4 and IPv6) associated with HPC calls. For more information, refer to SBC Support of GETS and WPS. Note: When the DSCP Value is modified, the new value applies only to new HPC calls while the existing HPC calls use the previously configured value. |
To Copy Hpc Call Profile
To copy any of the created Hpc Call Profile and to make any minor changes, click the radio button next to the specific Hpc Call Profile entry to highlight the row.
Hpc Call Profile Highlighted
Click Copy Hpc Call Profile tab on the Hpc Call Profile List panel.
Hpc Call Profile Fields
The Copy Selected Hpc Call Profile window is displayed along with the fields which can be edited.
Hpc Call Profile Copy Window
The following fields are displayed:
Hpc Call Profile parameters
Parameter | Description |
|---|---|
| Name | The name of the HPC Call Profile. |
| State | Determines whether the HPC Call Profile entry is enabled or disabled.
|
| DSCP Value | The DSCP code for the HPC Call. The value has a range of 0-63, with a default of 0. The DSCP configuration in the SIP signaling port marks non-HPC calls. The DSCP value configured in the HPC profile takes precedence over the DSCP value configured in the SIP signaling port, and applies to all outbound traffic (IPv4 and IPv6) associated with HPC calls. For more information, refer to SBC Support of GETS and WPS. Note: When the DSCP Value is modified, the new value applies only to new HPC calls while the existing HPC calls use the previously configured value. |
Make the required changes to the fields and click Save to save the changes. The copied Hpc Call Profile entry is displayed at the bottom of the original entry in the Hpc Call Profile List panel.
To Delete Hpc Call Profile
To delete any of the created Hpc Call Profile entry, click the radio button next to the specific Hpc Call Profile entry which you want to delete.
Hpc Call Profile Highlighted
Click Delete at the end of the highlighted row. A delete confirmation message appears seeking your decision.
Hpc Call Profile Delete Confirmation message
Click Yes to remove the specific Hpc Call Profile entry from the list.
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