This section helps you to understand the options to manipulate SIP header content.
On the SBC main screen, go to Configuration > System Provisioning > Category: Trunk Provisioning > Trunk Group > SIP Trunk Group > Signaling > Message Manipulation.
Message Manipulation can be checked for each Address Context, for each Zone, for each SIP Trunk Group created or for all the Address Contexts, Zones and SIP Trunk Groups created. Use the drop-down box to select the desired Address Context, Zone and SIP Trunk Group. The Edit Message Manipulation window is displayed. The following fields are displayed: Make the required changes and click Save at the right hand bottom of the panel to save the changes made.