AT&T CL2909 - Manual (Page 14)

Getting started
8
Reverse the handset tab.
This tab holds the handset when you hang up. Hold down the switchhook,
and slide the handset tab up and out of its slot. Turn the tab so that the
end with the hook is up. Then insert the handset tab back into its slot.
3.
Connect the short telephone line cord to a wall jack and mount the
telephone on the studs on the mounting plate.
Make sure the short telephone line cord snaps firmly into place. Place the
telephone on the wall jack mounting stubs and pull down until it is held
securely.
4.
Follow steps 4-5 in Tabletop installation on page 6. 5.
DSL filter (not
included)
Switchhook
Handset tab