[Freeswitch-users] Set b-leg CallerID using from in a 300 Multiple Choices reply

Hi Guys I am trying to use the From field in a 300 Multiple Choices message to set the outbound CallerID in the re-directed b-leg So call comes into FreeSwitch, gets sent out to a SIP Redirect server which replies with a 300 Multiple choices. I need to pull the number from the From field of this 300 Response and use it to set the From field, raid & Paid fields in the re-directed invite. Any help would be very much appreciated. Regards