The 5ESS switching system: System test, first-office application, and early field experience

Comprehensive system testing and verification of feature design at a “first-office”-application site are integral parts of the design and development methodology for the 5ESS™ system. The strict enforcement of this methodology has led to a product that has exhibited high quality and reliability in the field. This paper describes the activities associated with the integration and system testing of 5ESS system generics, as well as the procedures used at the first-office-application site to verify operational compatibility prior to release for service. The operational experience with in-service 5ESS systems is also described.