
COMSPHERE ±48 Vdc Central Office Power Unit
| shared diagnostic unit | A circuit card that plugs into a dedicated slot in the COMSPHERE 3000 Series | 
| (SDU) | Carrier to provide the shared diagnostic control panel and network management | 
| 
 | interfaces to the DSUs in the carrier. It translates the network management protocol | 
| 
 | to the devices in the carrier and routes incoming messages to the appropriate slots. | 
| 6800 Series Network | A Paradyne automated network management system that supports the CO Power | 
| Management System | Unit and other devices. It allows an operator to monitor network conditions, | 
| (NMS) | analyze problems, and take restorative measures. | 
| May 1998 |