AT&T 1856 Quick Start Manual page 6

Installation options
Tabletop installation
2. Hold down the switch hook on the telephone base, then slide the handset tab
upwards to remove it from the slot. Rotate the handset tab 80 degrees. Push
the handset tab down into the grooves so it settles into position.
3. Rotate the bracket to tabletop position, insert the bracket tabs into slots
on the telephone base, then press the other bracket tabs into slots
. Plug one end of the telephone line cord into the telephone base. Plug the
other end into the wall jack. Plug the small end of the power adapter into
the telephone base. Route the power adapter cord through the slot. Plug
the large end of the power adapter into an electrical outlet not controlled
by a wall switch.
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