Vplmn ID - Emergency Urn Prefix

Use this window to identify specific URN prefix values that identify emergency calls for a specific Visited Public Land Mobile Network (VPLMN) ID. In networks supporting the S8 Home Routing (S8HR) roaming model, any calls that are identified as emergency calls from users identified as outbound roaming users are processed so that the calls are handled by the visited network rather than the home network. 

Refer to Emergency Call Handling for the Roaming Users in S8HR Model for more information.

To View Emergency Urn Prefixes

On the SBC main screen, go to All > Profiles > Services > Vplmn Profile > Vplmn ID > Emergency Urn Prefix. The Emergency Urn Prefix window opens displaying all configured emergency urn prefixes.

To Create an Emergency Urn Prefix

You must associate each URN prefix with a specific VPLMN ID within a specific VPLMN profile. The option to create an emergency URN prefix only becomes available after you select a VPLMN profile and VPLMN ID. 

1. In the Vplmn Profile list, select the VPLMN profile to which you want to add the prefix.
2. In the Vplmn ID list, select the VPLMN ID to which you want to add the prefix.

3. Click New Emergency Urn Prefix. The Create New Emergency Urn Prefix window opens.

4. In Urn Prefix Entry, enter a prefix that identifies an emergency call. The prefix can be up to 27 alphanumeric characters. 

5. Click Save.

To Delete an Emergency Urn Prefix

1. Click the radio button adjacent to the emergency URN prefix you want to delete.
2. Click the red X at the end of the row.
3. Confirm the deletion when prompted.