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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 Telecommunications Service and Wireless Priority Service.
SBC is enhanced to support 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.
- 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 | Specifies the name of the HPC Call Profile. |
State | Specifies whether HPC Call Profile entry is enabled or disabled. The options are:
|
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 | Specifies the name of the HPC Call Profile. |
State | Specifies whether HPC Call Profile entry is enabled or disabled. The options are:
|
| Rph | |
Ets Default Value | Specifies the default value used for the ETS namespace. The value ranges from 0 to 4 and the default value is 0. |
Use Wps Precedence | Specifies whether SBC must use ingress precedence, if available as ETS value when adding RPH header. The options are:
|
Use Incoming Ets | Specifies whether SBC uses the received ETS value if available, when adding RPH and it has the highest precedence in deciding ETS value when adding RPH. The options are:
|
Use Precedence | Specifies whether to use precedence Multilevel Precedence and Preemption or Wireless Priority Service (MLPP/WPS) from ingress side to be sent on egress side. The options are:
|
Ets CPC Precedence | Controls the SBC behavior when it receives conflicting Emergency Telecommunications Services (ETS) (RPH and CPC (ISUP-MIME)) values. The options are:
|
Wps MIpp Precedence | Specifies the SBC behavior when there is a conflict between precedence derived from RPH WPS namespace and ISUP-MIME (SIP-I) MLPP values. The options are:
|
Include Require | Specifies whether a Require: Resource-Priority header is included in an egress INVITE or not. The options are:
|
Reject Not Ets Dn | If SBC classifies a call as HPC based on received RPH and rejectNotEtsDn is enabled and if PSX determines that the dialed digits do not match the PSX's configuration for Government Emergency Number Prefix, the call will be rejected. The options are:
|
Include Accept In417 | Specifies whether SBC includes the Accept-Resource-Priority header or not when sending a 417 response. The options are:
|
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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