AT&T 992 User Manual page 5

The instructions below are for both table/desk and wall installation.
1 Choose a spot near an electrical outlet and a telephone jack.
This phone requires a modular telephone jack and a standard
electrical outlet (110v AC) not controlled by a wall switch.
2 Install the handset battery.
• Remove the battery cover by pressing on the indentation and
sliding downward.
• Plug the battery pack connector into the handset, and place
the battery pack and wires into the compartment.
• Replace the battery cover by sliding it on its track up over the
battery compartment until it snaps firmly into place.