Whenever a call comes to a CTI Route Point manged by a CCX application, I see in CDR that there are some 4 digit numbers starting with 61 appearing in finalCalledPartyNumber field. These numbers don't exist in our system, but appear in CDR. What are these numbers? What is their technical name? Someone told me these numbers are generated on the fly to maintain call status before actually forwarding to the party. Can someone please provide more details?