5th August 2014 at 16:02
#41128
gyan
Guest
It is -48 V D.C cause of the commercial battery stack available. Commercial battery stack is available in -12 V, -24 V or – 48 V. For info, actually any telecom equipment or for that matter any sophosticated equipment runs on a range of supply voltages by using their own inbuilt SMPS and it is very difficult to maintain a constant voltage by the power source.