Most alarm systems are activated by a keypad. You enter a personal identification number (PIN) to arm and disarm the system. There are also key fobs that can be used to arm and disarm the system. The key fob sends a radio signal to the alarm panel, which then disarms or arms the system. Some alarm systems can be activated using your smartphone. You download an app and use your phone to arm and disarm the system.

There are many ways to activate a house alarm system. One way is to use a keypad to enter a code that will arm the system. Another way is to use a remote control to activate the system. Some systems can be activated by voice command or through a mobile app.