Interested to Buy Any Domain ? << Click Here >> for more details...
Why -48V dc power supply using in telecom field?
- 7 Answers
- 23475 Views
- APC, Cisco, I also Faced
- E-Mail Answers
Answer Posted / cnu
Basically for any electronic device it needs a DC supply as
a source power the different components inside it.
everybody knew that the telephone in our houe will not
contain any supply line (speaking about basic model) other
than the one that comes from the exchange. but how is the
Electronic board inside the telephone is working?
this line carries a DC voltage of 48V (42V to $8V approx).
this voltage supplies power to the components inside the
telephone as well as carries the voice signals from
exchange to our phone and vice versa.
| Is This Answer Correct ? | 16 Yes | 9 No |
Post New Answer View All Answers
Efficient electrical earthing in hard rock area
Hello everyone, somebody knows what is a "surplice power" ? The hole phrase is: "This rating is appropriate for a generator set paralleled with an infinite bus e.g. a national electrical supply network or grid where the generator set is run at 100% load, 24 hours a day, 365 days a year and any surplice power is exported into the grid" Thanks in advance.
what is the correct method for the outdoor termination of 19/33 KV HT cable step by step?
is it possible to turn on the single phase star delta on delay timer using 24 v dc ?
How to Calculate KA Rating of Main LT Panel
In which of the following case, the rotating magnetic field is reversed? A regenerative breaking B plugging C dynamic breaking D forward motoring
best manufacturer for busbar for outdoor switchyard having double bus bar scheme, can any one share technical specification of busbar. 132kv voltage ?
what is the effect of vector group while phase sequence of a generator changes,whether the vector group changes or not
for what purpose the star point is done in ct
why single CT used in DOL starter power circuit?
how to estimate wiring ins roughing ins. and boxes
what are the condition that makes hooter blow?
any one can explain the stages of a knee point which is taken during ct magnetising curve.
WHY RATING OF VCB NOT LESS THAN 630A
i've iocl interview.. if you know the interview process please give me information..
