In the 1990s, the Facility and Equipment Planning System (FEPS) and Planning Workstation System (PWS) products were incorporated into the Telcordia TIRKS CE System. TIRKS is still in use at AT&T, Verizon, CenturyLink/Lumen Technologies, and altafiber.
In the 1990s, the Telcordia TIRKS CE System combined the Facility and Equipment Planning System (FEPS) and Planning Workstation System (PWS). As a result, these systems remain in use by prominent carriers including AT&T, Verizon, CenturyLink/Lumen Technologies, and altafiber.