Patent ID: 7308491
Filing Date: 2007-12-11
Classification: H04W

Abstract:
1. For use in a switch comprising two or more call application nodes (CANs), a method of upgrading a plurality of call process server applications, wherein each of the call process server applications comprises a primary call process and a backup call process executed on different ones of the two or more CANs, the method comprising the steps of: receiving a shutdown command operable on a first call process server application comprising a first primary call process executed on a first CAN and a first backup call process executed on a second CAN; in response to receipt of the shutdown command, disabling the first primary call process such that no future call traffic associated with the first call process server application is directed to the first primary call process on the first CAN; re-designating the first backup call process as a new primary call process of the first call process server application such that all future call traffic associated with pre-existing calls handled by the first call process server application is directed to the re-designated first backup call process on the second CAN; moving a second backup call process, if any, associated with a second call process server application and resident on the first CAN to a different CAN; and installing an upgraded first call process server application on the first CAN, such that an upgraded first primary call process of the upgraded first call process server application executes on the first CAN and creates on the first CAN an upgraded first backup call process of the upgraded first call process server application.