OSPS System Architecture
Richard J. Basso, Hugh J. Beuscher, Iris S. Dowden, Richard J. Piereth, Samuel M. Salchenberger · AT&T Technical Journal · 1989
Operator services position system (OSPS) architecture builds on the 5ESS® switch Integrated Services Digital Network (ISDN) base to provide modern, flexible operator services. This article details some major operator system innovations provided by the OSPS system architecture.