# Enabling OSB Call

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Descriptions

The Called Number Prefix Barring feature allows an operator or service provider to bar subscriber within his home PLMN from making an outgoing call with certain destination prefix. There can be multiple destination prefixes to be barred and they are configurable. There are two different profiles allowed to be set. Each profile contains a different set of number prefixes subject to barring. Operator can then assign different profiles to different subscribers according to the services they have subscribed.

This feature provides operators a truly flexible call barring tool for a variety of destinations to be restricted. Since the restriction is dialing prefix based, this feature gives the operator full flexibility to bar some subscribers from calling any call destinations. no matter it is local or domestic or international. This is in addition to the already implemented standard international call barring and the Operator Determined Call Barring features. The operators may want to enable the barring for those who have difficulty paying the bills while putting not barring for their premium subscribers.

There are two OSB attributes, OSB-1 & OSB-2 flags, defined in each Dialing Prefix’s propriety. If a Dialing prefix’s OSB flag is enabled then this Dialing Prefix is subject to that OSB call restriction. The operator constructs the two OSB profiles by setting the OSB flags of the Dialing Prefixes. The operator could apply one or two OSB profile(s) to the subscribers. When a subscriber with OSB applied tries to make an outgoing call with the number which Dialing Prefix OSB is enabled, the call will be barred. This feature has no impact on the mobile terminated calls.

A voice notification will be produced when a call is barred. The voice announcement is to inform the subscriber why call is barred so that the subscriber is not mistaken in thinking that the system is not connecting a particular call.

Implementation

| Configure MSC Parameters

1.Go to EMS >Configuration >NSS >MSC.

2.Make sure the System ID at the upper right corner displays MSC_pub, click the button.

1.Click the Dialing Prefix Set tab to display the Dialing Prefix Set table.

2.Click the proper hyperlinked index of an existing Dialing Prefix Set to open its Option window.

3.Click the hyperlinked number in the Dialing Prefix Entries field to open the Prefix table.

4.Click New at the bottom of the Prefix table to add OSB prefix.

5.In the Prefix ID box, click the button.

6.In the Prefix Option window, configure the relevant parameters given in the following table.

7.Click the button to update Prefix parameters to application servers.

8.Click the button to activate the new created premium prefix.

9.Repeat Step 4 to 8 to add more OSB prefixes.

Sub-parameter | Description | Recommended Value
Dialing Prefix
Prefix | A combination digits that dial to originate the premium call. | --
TON Incoming Call | The original type of the incoming number. It is specified by originating node for terminating node to route this call with proper dialed number manipulation. | Unknown
Length of Dialed Number | The length of the dialed number. | --
Call Type | Service type of the outgoing call. | Normal
RSC | Routing Selection Code is a "route selection" index to select a trunk group in a routing zone pointing to the destination. | --
CDR Flag | Enable or disable the Call Detail Record generation of this prefix. | Enable
MNP Flag | Enable if this prefix relating to Mobile Number Portability service. | Disable
Premium Call Flag | Enable Premium Call service and select a category. | Disable
OSB 1 Flag | Subscribers with OSB type 1 can only make calls to this dialing prefix with the Flag enabled. | •Enable •Disable
OSB 2 Flag | Subscribers with OSB type 2 can only make calls to this dialing prefix with the Flag enabled.
TON Outgoing Call | The transformed type of the incoming number, which will be routed to the associated trunk group. | --
Out Trunk Deletion Count | Number of digits to be deleted from the beginning of the dialed number. | --
Out Trunk Inserted Digits | Digits of the number to be added to the front of the dialed number. | --
E.164 International Deletion Count | Number of digits to be deleted from the beginning of the incoming number. | --
E.164 International Inserted Digits | Digits of the number to be added to the front of the incoming number to convert it to an international E.164 format (CC and NDC included). | --

| Configure VLR Parameters

1.Go to EMS >Configuration >NSS >VLR.

2.Make sure the System ID at the upper right corner displays VLR_pub, click the button.

1.On the System tab, configure the relevant parameters given in the following table.

2.Click the button to update parameters to application servers.

Sub-parameter | Description (Click highlight SAVE after change) | Recommended Value

OSB Definition

These options allow the operator to set whether a call is allowed or barred:

•If this option is set to call allow, the call with the called number matched the dialing prefix with the OSB attribute enabled will be allowed to pass through, all other calls will be barred.

•If it is set to call bar, the call with the destination number matching the dialing prefix defined with the OSB attribute enabled will be barred while all other calls will be allowed.

•OSB1=Disable, OSB2=Allowed

•OSB1=Allowed, OSB2=Disable

•OSB1=Disable, OSB2=Barred

•OSB1=Barred, OSB2=Disable

•OSB1=Allowed, OSB2=Allowed

•OSB1=Allowed, OSB2=Barred

•OSB1=Barred, OSB2=Allowed

•OSB1=Barred, OSB2=Barred

| Configure HLR Subscriber Account to Enable Called Number Prefix Barring

1.Go to EMS >Account >Subscriber >HLR.

2.Click the hyperlinked IMSI of the subscriber to open its Option window.

3.Click the button at the top of the parameter table to update values from HLR servers.

4.Configure the relevant parameters given in the following table.

5.Click the button to update modified attributes to HLR database.

Sub-parameter | Description | Recommended Value
ODB Status | A flag indicates whether a subscriber is subject to operator determined barring. | Operator Determined Barring
ODB Specific Data | Set the flag of Called Number Prefix Barring: •OSB1 •OSB2 | Check to Enable

See Also

• Enable Premium Call

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