Many home alarm systems feature control panels that require easy access to electricity and telephone connections. The home security company Provident Security notes that all-in-one control panels allow intruders to tamper with the system and sometimes disconnect the devices from electricity and telephone outlets.
Many home alarm systems rely on telephone connections to communicate with monitoring centers. A poor telephone connection or disconnected service can interfere with the alarm monitoring service. Bevan Security experts state that Voice over Internet Protocol, or VoIP, telephone services do not offer the same reliability as traditional phone lines and may cause the home alarm system to not work as expected. In addition, technology website DSL Reports notes that home alarms and Digital Subscriber Line service can interfere with one another.
Components like sensors and motion detectors in both wired and wireless home alarm systems can fail, according to the home security website Wireless Security Systems. When these components go bad, the home alarm may produce false alarms or fail to work altogether.