101st Airborne Division | Football League First Division | NCAA Men's Division I Basketball Championship | Football League Second Division | Joy Division | 82nd Airborne Division | Texas Ranger Division | Cypriot First Division | Hong Kong First Division League | Football League Third Division | division | Division (military) | USL Second Division | Third Division | The Division | Sylhet Division | United States Department of Justice Antitrust Division | Argentine Primera División | 2010 NCAA Men's Division I Basketball Tournament | NCAA Division I Baseball Championship | Faculty (division) | 2013–14 NCAA Division I men's basketball season | Riding (division) | Kumaon division | Belgian Second Division | 2013 NCAA Division I FBS football season | 2011 NCAA Division I FBS football season | Segunda División B | Peruvian Primera División | Division 4 |
When operating as a pure ADM, the 454 could add and drop circuits from OC-192 down to Digital Signal 1 (DS1) -- later it would support Wavelength Division Multiplexing (WDM).
SDH, SONET and WDM systems are often configured in self-healing rings.