Method of managing supplementary service procedures in the visitor location register of a gsm system directed towards the home location register

A SYSTEM TO MANAGE IN MSC / VLR SUPPLEMENTARY SERVICES PROCEDURES TOWARDS HLR, INCLUDES THE FOLLOWING STEPS: MSC / VLR KNOWED ONLY THOSE OPERATIONS THAT SHOULD BE IN MSC / VLR; WHEN YOU RECEIVE A ADVANCE ADDRESS MESSAGE WITHIN AN MS OPERATION, A CHECK IS MADE WITH A VIEW TO THE DESTINATION OPERATION; WHEN THE OPERATION IS KNOWN TO MSC / VLR, THE PROCEDURE IS TERMINATED AT MSC / VLR; WHEN THE OPERATION IS NOT KNOWN TO MSC / VLR, MSC / VLR DOES NOT MAKE ADDITIONAL CHECKS OF THE INVOLVED COMPONENT IN THE FORWARD MESSAGE RECEIVED FORWARD, BUT FORWARDS THE MESSAGE TO HLR IN THE CONDITION IN WHICH IT HAS BEEN RECEIVED IN .