Let the hive mind of Engadget get that for you.
"I just moved into a new apartment and have been reading about all of the new power strips out there, especially the green ones. I was wondering if you had any suggestions about which "green "power strips are out there with decent joules ratings. And when I say green, I mean power strips that have the remotes or switches to turn off all electricity flowing to certain plugs and with at least 2 plugs that are always on. I was looking specifically at sub $50 because I will need two, but if that is not possible I could be convinced otherwise. Thanks!"
-If the power is under part 15 limis, they can use any frequency, as long as it doesnt cause "harmful interference". Example: CDMA and GSM test sets are legal, especially when used in a shield box.
-Non-WCDMA systems don't authenticate the network. No problem there.
-GSM systems just query each network and try to register. If your phone has manual network selection, you just select the box's network.
-A test network code is established for CDMA systems, your phone automatically selects it if it sees it (for use in test)
-Femtocells run on (W)CDMA for frequency planning reasons, GSM can run just fine in a femtocell if it doesn't need to play nice with the rest of the network.
Essentially, you can do this by going on eBay and buying a HP CDMA or GSM test set, and patching the audio to a phone line yourself. It's also how you set up a fraudulent base station and listen in on others calls.