I build hardwired intrusion detectors that use your landline to dial your cellphone and turn on a camera, in conjunction with a separate redundant gigahz video/audio transmitter that calls you on a separate ghz a/v receiver range up to 30 miles and a separate alert intrusion Mhz transmitter/receiver pair 3 mile range which can have up to 10 or more family members with alert receivers/.. it can give biometric signatures of the intruders....if`n they hack your wifi or landline...just sayin`..it`s triple redundant...
I have an LED enhanced 9mm with a 17X serial multiprocessor backed up by a manually operated wide field dispersion device in conjunction with a 5.56 extended range supersonic delivery system with a 30X serial multiprocessor. So yea, triple redundancy. ;^)