why we use -48 power supply dc for Nokia Equipment,what is benifits of that?

why we use -48 power supply dc for Nokia Equipment,what is
benifits of that?

Question Posted / pawan

3 Answers
4830 Views
NSN, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

why we use -48 power supply dc for Nokia Equipment,what is benifits of that?..

Answer / vinay

Because -ve voltage is less prone to corosity as compared
to +ve voltage.
You can even see on batteries fitted with inverter in our
homes that only +ve terminal get corrogated and damaged.

Is This Answer Correct ?

1 Yes

0 No

why we use -48 power supply dc for Nokia Equipment,what is benifits of that?..

Answer / heet

Becase when we use -ve port for the equepment we use GND as
the refrence and so it would not damaged by corroson of the
power supply.

Is This Answer Correct ?

2 Yes

1 No

why we use -48 power supply dc for Nokia Equipment,what is benifits of that?..

Answer / tahir aziz

because we use +ve as a refrence (
ground) mostly damged batteries if u have seen the +ve
portion of the cell were damaged.

Is This Answer Correct ?

1 Yes

0 No

Post New Answer

More Electronics Communications Interview Questions

what is the use of -3 db frequency?& why does it exist in filters?

1 Answers

can you give me example of igbt drive circuit... i still not under stand how it can be design with certain equation using mathlab program...

0 Answers

Explain to find conductivity?

0 Answers

Explain what is the meaning of tristate signal in electronics?

0 Answers

i am also applied for the AAI jr executive (electronics/ATC) written test. pls forward me the syllabus & test pattern if any question papers, any one got reply for this quaries? if any one know plz reply to me on my email shivani_19jan@yahoo.co.in

3 Answers AAI Airports Authority Of India,

write a c programme to identify the biggest smallest and middle value of the given three numbers

2 Answers

why we not connect the 12 V batteries in parallel to get the more backup supply ? how to calculate the input wattage and output wattage of an UPS ?

1 Answers

What is the work of Bus cable, Power cable and Er cable in nokia flexi edge bts.

0 Answers TATA,

By referring to the barkhausen criterion and conventional circuit's analysis,show that for the Wein Bridge oscillator to oscillate,the voltage gain (Av) of the op amp must be set to 3 and the feedback ratio must be 1/Av.. Anyone, please help me!

0 Answers

Difference between mobile and a cell phone.

0 Answers

hiii,i am richa.. i want to know .. the criteria for appearung for BEL... how much percent i shuold have and is it will be for per semester or for a whole year

0 Answers HCL,

What are the basic logic gates?

0 Answers

For more Electronics Communications Interview Questions Click Here