AT&T DECT TL91278 - Manual (Page 17)

Getting started
12
Installation options
Desktop to wall mount installation
4. Align the holes on the bracket with the standard wall plate and slide the
bracket until the telephone is secured as shown below. Plug the telephone
line cord into a telephone wall jack. Plug the power adapter into a power
outlet not controlled by a wall switch.
3. Bundle the telephone line cord and power adapter cord, and secure them with Bundle the telephone line cord and power adapter cord, and secure them with
a twist tie before placing them behind the telephone base as shown below.
DSL filter (not included),
required if you have DSL
high-speed Internet service.