Using Dial Plan Tags for Message Manipulation

You can use Dial Plan tags (srctags and dsttags) in Message Manipulation rules, configured in the Message Manipulations table (see Configuring SIP Message Manipulation). The tags can be used only in the 'Condition' and 'Action Value' fields. For example, you can configure a rule that adds the SIP header "City" with the value "ny" (i.e., City: ny) to all outgoing SIP INVITE messages associated with the source tag "ny":