COMSPHERE ±48 Vdc Central Office Power Unit
NOTE
For more information on the alarm cables and NMS adapter cable, see Appendix A of this guide.
Part numbers for the CO Power Unit and its related components are listed in Appendix B of this guide.
Features
The CO Power Unit provides the following features:
•Enables DCEs supported by the COMSPHERE 3000 Series Carrier to operate in a ± 48 Vdc central office environment.
•Provides the following three modes of operation:
ÐBasic mode ± the mode in which the single power module supplies power to the entire carrier. This mode of operation is the only mode available for the CO Power Unit with one power module.
ÐRedundant mode ± the mode in which two power modules supply power to the entire carrier. If one power module fails, the remaining power module assumes the full load of the carrier. To operate in this mode of operation, you must install an optional second power module in the CO Power Unit.
ÐIndependent mode ± the mode in which each of the two power modules supplies power to
•Provides forced air cooling for the carrier via a
± 48 Vdc fan in the power module.
•Provides an optional air filter which prevents dust from entering the CO Power Unit and the COMSPHERE 3000 Series Carrier.
•Detects power module and fan failures by monitoring the power output levels and the fan's
•Sends power failure and/or fan failure alarms to a CO alarm system and/or a 6800 Series NMS via a Modular 3611 DSU.
Figure 1-1 illustrates the CO Power Unit with one power module in the left side of the CO power tray. In Basic mode, the single power module can be installed in either the left or right side of the CO power tray.
Figure 1-2 illustrates the CO Power Unit with two power modules.
May 1998 |