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Select the new Message Manipulation entry in the navigation tree
Panel borderStyle none Caption 0 Figure 1 Select Message Manipulation 
Add a SIP Message Rule Table
Panel borderStyle none Caption 0 Figure 1 Add SIP Message Rule Table 
Set how the rule will be applied. It can be applied to All SIP Messages, only Requests, only Responses, or Selected Messages.
Panel borderStyle none Caption 0 Figure 1 Applicable Messages 
Add an entry to the new table.
Panel borderStyle none Caption 0 Figure 1 Add Entry 
Set the Header Action to Modify and the Header Name to P-Asserted-Identity. As you can see, any SIP Header can be manipulated.
Panel borderStyle none Caption 0 Figure 1 Set Header Action And and Name 
To set the new PAI value, click Add/Edit...
Panel borderStyle none Caption 0 Figure 1 Set PAI Value 
... and add the new value in the Edit Message Field
Panel borderStyle none Caption 0 Figure 1 Edit Message Field 
Click OK to complete adding the entry to the table.
Panel borderStyle none Caption 0 Figure 1 Click OK 
In the SG, Enable the Message Manipulation
Panel borderStyle none Caption 0 Figure 1 Enable Message Manipulation 
Add the new Message Manipulation to the Outbound Message Manipulation Table
Panel borderStyle none Caption 0 Figure 1 Add Message Table 
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Add a Conditional Rule Table entry
Panel borderStyle none Caption 0 Figure 1 Add Conditional Rule Table Entry 
Add the Description and set the Match Type from the pulldown. In this case, we're looking to match the calling number, which is represented by the from.uri.userinfo.user token.
Panel borderStyle none Caption 0 Figure 1 Add Description And and Match Type 
Set the Operation to Equals. Set the Match Value Type to Literal and put the number to be matched into the Match Value.
Panel borderStyle none Caption 0 Figure 1 Set Operation 
With the Match information configured, it's time to modify the Message Rule so that it only runs when the Condition is met. In the Message Rule, click the Condition Expression Add/Edit button.
Panel borderStyle none Caption 0 Figure 1 Set Static PAI 
Set it for Match All Conditions and select the Conditional Rule you just finished programming in the previous steps. Click Apply.
Panel borderStyle none Caption 0 Figure 1 Message Rule Condition 
Click Apply to complete the update to the Message Rule.
Panel borderStyle none Caption 0 Figure 1 Update Message Rule 
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