C-DOT DSS-maintenance software

Switching systems are expected to meet stringent performance criteria, in order to meet the high availability requirements laid down for them. To meet these requirements, major emphasis is placed on reliability, quality of service and maintainability, in the Centre for Development of Telematics (C-DOT) digital switching system (DSS). A robust hardware/software distributed architecture is developed. Within this architecture a loosely coupled recovery strategy is adopted, in which an error is confined and recovered in the module where the error is detected. C-DOT DSS has a wide range of automated capabilities, which provide it with the capability to run with no need for manual intervention. These maintenance functions are capable of handling multiple failures and severe malfunctions. However, a wide variety of user friendly maintenance functions are provided which give the maintenance personnel overriding powers. The flexibility, fault resilience, and user friendly maintenance capabilities are described.<>