Just so you don't freak out some time, those wireless door bells sometimes pick up wirless internet signals as well. Had ours going berko one night. Was ready to kill the neighbours kids as I thought they were pranking us. Then the bell went off with me standing right there. Reason I found it was internet was my computer picked up the signal at the same time as the door bell. I turned off the bell and had free internet for a while. Then the buggers next door moved.
Border River Pet Resort