Applicability evaluation of service feature enhancement using the partial-file “plug-in” modification technique

This paper evaluates the applicability of the plug-in mechanism of the nonstop service enhanceable software (NOSES) platform. Plug-in is a dynamic partial-file modification technique that does not affect calls in service in a communication switching system. To apply plug-in program modification widely, the static and dynamic properties of the modified software must be considered. The evaluated applicability of plug-in based on case studies and field data was about 60% for service feature additions modifications. Thus, plug-in is effective for file maintenance of switching systems