GE 19209 Installation Instructions Manual page 3

Parking the jumper on an open set of pins. The two jumpers on the left are in the
parked position.
Setting The House Security Code
Each chime component has jumpers for setting the house security code.
In most cases you will not need to change the factory settings for the
security code. If your chime activates intermittently or does not work at all,
you may be able to solve the problem by changing your security code.