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Trunk Custom Headers


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Is there any detailed information on the trunk custom headers?


What I am looking to find is how much intelligence is built into the {if.... statement with custom headers?


I am looking to do something like IF to-user =~"^sip:1410[0-9]*@.*"

HeaderRpi: = ""

else HeaderRpi: = "01234567890"


i.e if the dialled number begins with 141 remove the RPID field else fill it with a number also I would need to strip the 141 from the dialled digits sent to the carrier.


Any help with the correct syntax would be appreciated






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