Before revision: Dec 2010 but the term OSS/BSS (or occasionally BSS/OSS) has been in use since at least URL Ericsson at OSS-BSS World Summit, London, 2010 The interface, for example, between the BSS capturing an order and the OSS fulfilling it could be quite URL Aradial OSS-BSS at WISPA summit 2019 The interfaces and models needed for OSS and BSS systems and scaling.
After revision: Dec 2010 but the term OSS/BSS (or occasionally BSS/OSS) has been in use since at least URL Ericsson at OSS-BSS World Summit, London, 2010 The interface, for example, between the BSS capturing an order and the OSS fulfilling it could be quite URL Aradial OSS-BSS at WISPA summit 2019