Cordless phone

I had the same type of question .When we needed phone service in our house it was 800 ft from the street .I was curious if we could use a remote instead of a hard line .The same for our internet connection .But we were told the phone company purposely limits reception .Probably so you can't borrow from your nieghbors wireless connection for free .But it did make me wonder if someone clever enough couldn't find a way to get around that .

Cordless generally work on 10mW transceivers. In some countries they may be 100mW. While power decreases with square root of the distance (1/x^2), e-field alone decreases in proportion to the distance (reciprocal or 1/x). Receiver requires microwatts signal at the input stage, and LNA sensitivity gives increased and decreased range. There are other factors, such as walls, trees, line of site, weather that also affect the range. 10mW can reach 300m in usual sense and 100mW can reach near 1km.

Then there are other factors. Bad LNA in transceiver can reduce the distance. Good antenna can increase the distance. Lower is the frequency band, greater is the distance, larger is the size of the antenna.

Each transceiver has way to protect communication and hence will not be of any use to other transceiver unless it is configured to be a part of the network.

Shyam
India

This sounds like a terrorist looking for an easy answer in building a remote control phone bomb. Since two of you have already given some sort of answer with out actually looking deeper into this question. In the day of terrorism and car bombs and the balance in the world, any type of legitemate answer could be a doomsday answer towards some poor civilian trying to exist in live. Reality is reality, and this being a sort of think tank of what nots, we fail to actually be aware of our answers, which are giving the enemy an education to some critical element of their plot against human kind. Food for thought.

You're a nut job.

You are right look what happend to appolications ment for defence use was declasified and released to commercial use.being free and generus we are responcible for transfering Know how to create desistors murali India

Surely, no would-be bomb-detonating terrorist needs to ask this forum for the information required. It's already public domain!

i agree with you murali Indai