On Fri, 7 Jun 2002, Kayne Ian (Softlab) wrote: > Why's that? I've never heard of a bank making that statement. A cordless > phone is pretty much a minor risk anyway, if someone wanted to go to the > trouble of listening in to your call to the bank, they'd be better off > splicing the phone line outside your house. IIRC DECT fones are scrambled in this situation is similar to ethernet - would you rather tap wires (even if they were outside the building), or listen for accesspoints within the area? > some way, so you can't just tune in with a reciever. Non-DECT fones have just because it's digital, doesn't mean you can't listen to it :) unless it's encrypted of course. > enough trouble finding the base station and making a clear call through even > paper thin walls, so someone sitting outside your house is unlikely to get > anything through a few layers of concrete... i wouldn't be so sure. once upon a time people used phones that transmited 49MHz from the set and 46MHz from the base station. using a cb radio receiver and a simple home made converter i could listen into the base station from very far away. on a 1/4 gp antenna i could hear a base station from over a kilometer away (at night when the channel wasn't very crowded). a 3 element yagi antenna improved the range even further. the only problem with listening to cordless phones is that there are too many on a single channel transmiting at once, so you hear only nearby stations. i haven't personally tried listening to 900MHz phones, but i would suspect that they are even easier to listen to. the higher the frequency the easier it is for radio waves to bounce around obstacles. you can also make a directional antenna with higher gain easily. jacek
This archive was generated by hypermail 2b30 : Mon Jun 10 2002 - 11:29:22 PDT