Andrew Wireless System NCM843 Manuel D’Utilisation

5 Functional Description 

 

 

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In case power fails, a battery backup system for controller and modem has been 
implemented. This provides enough power for the controller that is integrated into the 
DCM and the modem to operate for a limited period of time (battery backup time). 
Within this time, the Node M/C will initiate a call to the OMC and alert the operator 
that power has been lost. All other functions will cease to work in case of power 
failure. 
 
The battery pack is protected from deep discharge. When performing preventive 
maintenance, make sure that all circuits are voltage free by disconnecting the battery 
cable from the DCM. In case of a power cycle, it is sufficient to press the “Battery 
disconnect button” on the EAC-board to interrupt the voltage supply. After mains is 
connected again, the battery will be charged and the battery backup function will be 
available again.