Use this window to define the prescribed behavior associated with various 3GPP P-Headers.
On the SBC main screen, go to Configuration > System Provisioning > Category: SIP Carrier Peering > Signaling > P-Header Extensions. The P-Header Extensions window is displayed.
Use the drop-down boxes to select the desired Address Context, Zone and SIP Trunk Group. The Edit P-Header Extensions window is displayed. The following parameters can be configured: Make the required changes and click Save.