File operation for a non-stop service enhanceable software (NOSES) platform

This paper presents the main technologies required for file operation in a non-stop service enhanceable software (NOSES) environment. NOSES is a software system that ensures reliable operation of communication and switching systems for multimedia and B-ISDN communication as well as ordinarily telephone communication. An over-all file management architecture based on a TMN architecture has been established for partial file modification, office data provisioning, and file updating. The necessary file management functions, including configuration control and testing have been identified and developed. Since file handling may often cause serious problems, internal program execution and operational behaviour are coordinated. A mechanism has been developed to run new and old programs/data simultaneously during verification of modifications so that incorrect modifications can be rolled back